Safety precautions by mikeholy


                                     0109969en   001

                      Gasoline portable cut-off saw

                                            BTS ...

Operator´s Manual
       Important information

           This machine has been provided with an EPA-certified engine.

           Additional information           can    be    found      in   the     engine
           manufacturer‘s notes.

                   Engine exhaust, some of its constitvents, and certain vehicle
                   components contain or emit chemicals known to the State of
                  California to cause cancer and birth defects or other reproduc-
                                            tive harm.


                                  This engine is an EPA engine.
                Adjusting the engine speed will interfere with EPA certification and
                                         the emissions.
                 Only authorized personnel can make adjustments to this engine.
             Please contact you nearest engine dealer or your Wacker Dealer for more

T00940GB                               1
T00940GB   2
      for machines equipped with an EPA-certified engine (USA)

      The engine manufacturer warrant(“s”) to the initial retail purchaser and each
      subsequent owner, that this non-road engine (herein “engine“) has been designed,
      built, and equipped to conform at the time of initial sale to all applicable regulations of
      the U.S. Environmental Protection Agency (EPA), and that the engine is free of defects
      in materials and workmanship which would cause this engine to fail to conform with
      EPA regulations during its warranty period.
      For the components listed under PARTS COVERED, the service dealer authorized by
      WACKER will, at no cost to you, make the necessary diagnosis, repair, or replacement
      necessary to ensure that the engine complies with applicable U.S. EPA regulations.
      The warranty period for this engine begins on the date of sale to the initial purchaser
      and continues for a period of 2 years.
      Listed below are the parts covered by the Emission Components Defect Warranty.
      Some of the parts listed below may require scheduled maintenance and are warranted
      up to the first scheduled replacement point for that part.
      Fuel Metering System
      Carburetor and internal parts
      Fuel filter, if applicable
      Throttle stopper, if applicable
      Choke System, if applicable
      Air Induction System
      Air cleaner plate, Air filter
      Air cleaner case, Intake manifold
      Ignition System
      Spark plugs
      Flywheel Magneto
      Ignition Coil
      Miscellaneous Items Used in Above Systems
      Fuel hoses, clamps and sealing gaskets
      To obtain warranty service, take your engine to the nearest authorized WACKER
      service dealer. Bring your sales receipts indicating date of purchase for this engine.
      The service dealer authorized by WACKER will perform the necessary repairs or
      adjustments within a reasonable amount of time and furnish you with a copy of the
      repair order. All parts and accessories replaced under this warranty become the
      property of WACKER.

T00965GB                                     3

                ∗    Conditions resulting from tampering, misuse, improper adjustment
                     (unless they were made by the service dealer authorized by WACKER
                     during a warranty repair), alteration, accident, failure to use the
                     recommended fuel and oil, or not performing required maintenance

                ∗    The replacement parts used for required maintenance services.

                ∗    Consequential damages such as loss of time, inconvenience, loss of
                     use of the engine or equipment, etc.

                ∗    Diagnosis and inspection charges that do not result in warranty-eligible
                     service being performed.

                ∗    Any non-authorized replacement part, or malfunction of authorized
                     parts due to use of non-authorized parts.


      As the engine owner, you are responsible for the performance of the required
      maintenance listed in your owner’s manual. WACKER recommends that you retain all
      receipts covering maintenance on your engine, but WACKER cannot deny warranty
      solely for the lack of receipts or for your failure to ensure the performance of all
      scheduled maintenance. As the engine owner, you should however be aware that
      WACKER may deny warranty coverage if your engine or a part has failed due to abuse,
      neglect, improper maintenance or unapproved modifications.

      You are responsible for presenting your engine to the nearest service dealer
      authorized by WACKER when a problem exists.

      If you have any questions regarding your warranty rights and responsibilities, you
      should contact the WACKER CORPORATION Product Support Department (U.S.A. 1-
      800-770-0957, Canada 1-877-977-0775) for the information.


T00965GB                                  4

      You are responsible for the proper maintenance of the engine. You should keep all
      receipts and maintenance records covering the performance of regular maintenance in
      the event questions arise. These receipts and maintenance records should be
      transferred to each subsequent owner of the engine. WACKER reserves the right to
      deny warranty coverage if the engine has not been properly maintained. Warranty
      claims will not be denied, however, solely because of the lack of required maintenance
      or failure to keep maintenance records.


      If other than the parts authorized by WACKER are used for maintenance replacements
      or for the repair of components affecting emission control, you should assure yourself
      that such parts are warranted by their manufacturer to be equivalent to the parts
      authorized by WACKER in their performance and durability.


      All repair qualifying under this limited warranty must be performed by a service dealer
      authorized by WACKER. In the event that any emission-related part is found to be
      defective during the warranty period, you shall notify WACKER CORPORATION
      Product Support Department (U.S.A. 1-800-770-0957, Canada 1-877-977-0775) and
      you will be advised of the appropriate warranty service dealer or service providers
      where the warranty repair can be performed.

T00965GB                                   5
T00965GB   6
Operating instructions
1.   Foreword

                For your own safety and protection from bodily injuries, carefully read,

                understand and follow the safety instructions in this manual.

                Please operate and maintain your Wacker machine in accordance with

                the instructions in this manual. Your Wacker machine will reward your

                attention by giving trouble-free operation and a high degree of


                Defective machine parts are to be replaced as soon as possible.

                All rights, especially the right for copying and distribution are reserved

                Copyright by Wacker Construction Equipment AG

                No part of this publication may be reproduced in any form or by any

                means, electronic or mechanical, including photocopying, without

                express permission in writing from Wacker Construction Equipment AG.

                Any type of reproduction, distribution or saving on data carriers of any

                type or method not authorized by Wacker represents an infringement of

                valid copyrights and will be prosecuted. We expressly reserve the right

                to technical modifications - even without express due notice - which aim

                at improving our machines or their safety standards.

Table Of Contents
1.   Foreword                                                                                                        7

2.   Thank you for purchasing a WACKER product!                                                                    10
     2.1    Packing ............................................................................................... 11

3.   Delivery Inventory/Symbols                                                                                    12
     3.1    Delivery Inventory ............................................................................... 12
     3.2    Symbols .............................................................................................. 12

4.   Safety precautions                                                                                            14
     4.1    Use as designed ................................................................................. 14
     4.2    General precautions ........................................................................... 14
     4.3    Personal protective equipment ........................................................... 15
     4.4    Fuels/Refuelling .................................................................................. 17
     4.5    Putting into operation ......................................................................... 18
     4.6    Cutting blades .................................................................................... 19
     4.7    Kickback and lock-in ........................................................................... 22
     4.8    Working behavior/Method of working ................................................. 23
     4.9    Cutting metals .................................................................................... 24
     4.10   Cutting masonry concrete, asbestos or asphalt ................................. 27
     4.11   Transport and storage ........................................................................ 29
     4.12   Maintenance ....................................................................................... 30
     4.13   First aid ............................................................................................... 31

5.   Technical data                                                                                                32

6.   Denomination of components                                                                                    34

7.   Putting into operation                                                                                        36
     7.1    Fitting cutting blades .......................................................................... 37
     7.2    Tightening the V-belt/Checking V-belt tension ................................... 38
     7.3    Fuels ................................................................................................... 39
     7.4    Fuel storage ....................................................................................... 40
     7.5    Refuelling ........................................................................................... 41
     7.6    Starting the engine ............................................................................. 42

                                                                                       Table Of Contents
     7.7     Cold-starting ....................................................................................... 43
     7.8     Warm-starting ..................................................................................... 44
     7.9     Stopping the engine ........................................................................... 44
     7.10    Adjusting the carburetor ..................................................................... 44

8.   Maintenance                                                                                                 46
     8.1     Changing the V-belt ............................................................................ 47
     8.2     Cleaning the protective hood .............................................................. 48
     8.3     Cleaning/changing the air filter ........................................................... 48
     8.4     Prefilter and air cleaner insert ............................................................ 50
     8.5     Replacing the spark plug .................................................................... 51
     8.6     Checking the ignition spark ................................................................ 52
     8.7     Replacing the suction head ................................................................ 53
     8.8     Starter rope replacement .................................................................... 53
     8.9     Replace the return spring ................................................................... 55
     8.10    Cutting arm in inboard/outboard ......................................................... 56
     8.11    Repositioning the cutting arm ............................................................. 57
     8.12    Instructions for periodic maintenance ................................................. 59
     8.13    Troubleshooting .................................................................................. 61

9.   FBTS                                                                                                        62
     9.1     Guide cart ........................................................................................... 62
     9.2     Safety precautions .............................................................................. 63

10. Labels                                                                                                       64

     EC - Confornity Certificate                                                                                 65

     DIN EN ISO 9001 CERTIFICATE                                                                                 67

Thank you for purchasing a WACKER product!
2.    Thank you for purchasing a WACKER product!

                 Congratulations on choosing a WACKER Power Cut cutoff saw!
                 WACKER Portable Cut-off Saws feature specially designed high-
                 performance engines with outstanding power-to-weight ratios, for
                 heavy-duty yet lightweight tools.

                 Other advantages of the WACKER Portable Cut-off Saws:

             ∗   Sturdy construction and high reliability.

             ∗   Maintenance-free electronic ignition, hermetically sealed to protect
                 against dust and moisture.

             ∗   Vibration damping with 2-mass system for Less fatigue-oróne working
                 even when guiding the Cut-off Saw by hand.

             ∗   Five-stage air-filter system for reliable working even under very dusty

             ∗   Two options for mounting the cutting arm: Either inboard, for good
                 balance when guiding the unit manually, outboard, for flush cuts along
                 walls or curbsides or horizontally directly above the ground.

             ∗   Extensive range of accessories available, such as resinoid-bonded or
                 diamond-tipped cutting blades as well as a guide trolley, water
                 sprinkling system or angled fuel tank filler neck.

                 We want you to be satisfied with your WACKER product.

                 In order to guarantee the optimal function and performance of your
                 Cut-off Saw and to ensure your personal safety we would request you
                 to perform the following:

                 Read this instruction manual carefully before putting the Cut-off
                 Saw into operation for the first time, and strictly observe the
                 safety regulations! Failure to observe these precautions can lead
                 to severe injury or death

T00961GB                              10
                      Thank you for purchasing a WACKER product!
      2.1   Packing

                 Your WACKER Power Cut is packed in a cardboard box to prevent
                 shipping damage.

                 Cardboard is a basic raw material and is consequently reuseable or
                 suitable for recycling (waste paper recycling).

T00961GB                           11
Delivery Inventory/Symbols
3.    Delivery Inventory/Symbols

      3.1   Delivery Inventory

                    1. Cut-off saw
                    3. Universal wrench 13/19
                    4. Allen key
                    5. Screwdriver for carburetor adjusment
                    6. Operator‘s manual (not shown)

                   In case one of the parts listed should not be included in the delivery
                   inventory, please consult your sales agent!

      3.2   Symbols

            You will notice the following symbols on the saw and in the operator´s

                      Read operator´s manual and
                      follow the warning and                  Combination switch Start/Stop
                      safety precautions!                     (I/O), choke

T00961GB                               12
                                          Delivery Inventory/Symbols

           Particular care and caution!          Locked / Unlocked

           Forbidden!                            Use eye protection!

           Wear protective helmet, eye           Engine - manual start
           and ear protection!

           Wear protective gloves!               Stop engine!

           Wear respiratory protection!          Warning! Kickback!

           No smoking!                           Fuel/oil mixture

           No open fire!                         First aid

           Turning direction of cutting          Recycling

           Max. peripheral blade speed           CE - marking

           Cutting blade dimensions

T00961GB                      13
Safety precautions
4.    Safety precautions

      4.1   Use as designed

                    Cut-off saw
                    The cut-off saw may only be used for the cutting/shortening of
                    appropriate materials outdoors with a cutting blade approved for the
                    Unauthorized working procedure
                    The cutting blades of the cut-off saw may not be used for grinding
                    purposes (removal of material with the side face of the cutting blade).
                    This could cause the blade to fracture! Fitting the cut-off saw with
                    circular saw discs, knives, brushes etc. is absolutely forbidden.
                    Non-authorized operators:
                    Persons who are not familiar with the operator´s manual, children,
                    teenagers, as well as persons under the influence of alcohol, drugs or
                    medication are not allowed to operate the machine.

      4.2   General precautions

            4.2.1   The operator MUST read this manual to ensure safe operation
                    (even if you already have experience in using cut-off saws), It is
                    important to be familiar with the operation of this particular cut-off saw.
                    Users insufficiently informed will endanger themselves as well as
                    others due to improper handling.


            4.2.2   Let only persons who have experience in using cut-off saws work with
                    this unit. When letting another person use the cut-off saw, this manual
                    must be provided along with it.
            4.2.3   First-time operators should ask a specialist to instruct them in working
                    with gasoline-powered cut-off saws.
            4.2.4   Children and persons under 18 years of age must not be allowed to
                    use this cut-off saw. Persons over the age of 16 years may, however,
                    use the cut-off saw for the purpose of being trained as long as they are
                    under the supervision of a qualified trainer.
            4.2.5   Working with the cut-off sawrequires high concentration.
            4.2.6   Operate the Power Cut only if you are in good physical condition. If you
                    are tired, your attention will be reduced. Be especially careful at the
                    end of a working day. Perform all work calmly and carefully. The user
                    has to accept liability for others.

SV00068GB                                14
                                                                  Safety precautions
            4.2.7   Never work while under the influence of alcohol, drugs, medication or
                    other substances which may impair vision, dexterity or judgement.


            4.2.8   Ar fire extinguisher must be available in the immediate vicinity when
                    working in easily inflammable vegetation or when it has not rained for
                    a long time (danger of fire).
            4.2.9   Asbestos and other materials that can release toxins may be cut only
                    with the necessary safety precautions and after notification of the
                    proper authorities and under their supervision or that of a person
                    appointed by them.

      4.3   Personal protective equipment

            4.3.1   In order to avoid head, eye, hand or foot injuries as well as to
                    protect your hearing the following protective equipment must be
                    used during operation of the cut-off saw:
            4.3.2   The kind of clothing should be appropriate, i. e. it should be tight-fitting
                    but not be a hindrance. Clothing in which grains of material can
                    accumulate (trousers with cuffs, jackets and trousers with wide-open
                    pockets, etc.) must not be worn, particularly when cutting metal.
            4.3.3   Do not wear any jewellery or clothing that can get caught or distract
                    from the operation of the cut-off saw.


            4.3.4   It is necessary to wear a protective helmet whenever working with the
                    cut-off saw. The protective helmet (A) is to be checked in regular
                    intervals for damage and is to be replaced after 5 years at the latest.
                    Use only approved protective helmets.
            4.3.5   The helmet visor (B) protects the face from dust and material grains.
                    In order to prevent injuries to eyes and face, always wear protective
                    goggles (C) or visor when using the cut-off saw.

SV00068GB                                15
Safety precautions
            4.3.6    To prevent hearing damage, always wear suitable personal hearing
                     protection. (ear muffs (D), ear plugs, etc.). Octave brand analysis
                     upon request.


            4.3.7    When dry-cutting dust-producing materials such as stone or concrete,
                     always wear approved respiratory protection (E).

            4.3.8    Work gloves (F) of tough leather are part of the required work kit of
                     the cut-off saw and must always be worn when working with the cut-off


            4.3.9    Always wear safety shoes or boots (G) with steel toes, non-skid
                     soles, and leg protectors when working with the cut-off saw. Safety
                     shoes equipped with a protective layer provide protection against cuts
                     and ensure a secure footing.

            4.3.10   Always wear a work suit (H) of sturdy material.

SV00068GB                                16
                                                                    Safety precautions
      4.4   Fuels/Refuelling

            4.4.1    Go to a safe, level place before refuelling. Never refuel while on
                     scaffolding, on heaps of material, or in similar places!
            4.4.2    Switch off the engine before refuelling the Power Cut.


            4.4.3    Do not smoke or work near open fires (6).
            4.4.4    Let the engine cool down before refuelling.
            4.4.5    Fuels can contain substances similar to solvents. Eyes and skin should
                     not come in contact with mineral oil products. Always wear protective
                     gloves when refuelling (not the regular work gloves!). Frequently clean
                     and change protective clothes. Do not breathe in fuel vapors.
                     Inhalation of fuel vapours can be hazardous to your health.
            4.4.6    Do not spill fuel. If a spill occurs, clean off the cutt-off saw immediately.
                     Fuel should not come in contact with clothes. If your clothes have
                     come in contact with fuel, change them at once.
            4.4.7    Ensure that no fuel runs into the soil (environmental protection). Use
                     an appropriate base.
            4.4.8    Refuelling is not allowed in closed spaces. Fuel vapors will accumulate
                     near the floor (explosion hazard).
            4.4.9    Make sure to firmly tighten the screw plug of the fuel tank.

                           3 meters
                           (10 feet)

            4.4.10   Before starting the engine, move to a location at least 3 meters (10
                     feet) from where you fuelled the cut-off saw (7), but not within the
                     extended swing range of the cutting blades (direction of sparks).
            4.4.11   Fuel cannot be stored for an unlimited period of time. Buy only as much
                     as will be consumed in the near future.
            4.4.12   When making up the gasoline/oil mixture, always put the oil in the
                     mixing container first, and then the gasoline.

SV00068GB                                  17
Safety precautions
            4.4.13   Use only approved and marked containers for the transport and
                     storage of fuel.

                     Keep fuel away from children!

      4.5   Putting into operation

            4.5.1    Do not work on your own. There must be someone around in case
                     of an emergency (within shouting distance).

            4.5.2    Observe all anti-noise regulations when working in residential areas.

            4.5.3    Never use the Power Cut near inflammable materials or explosive
                     gases! The Power Cut can create sparks leading to fire or

                                          30 m(100 feet)

                                                    = Wear protective equipment

            4.5.4    Make sure that all persons within 30 meters (100 feet), such as other
                     workers, are wearing protective gear (see „Protective Equipment“) (8).
                     Children and other unauthorized persons must remain more than 30
                     meters (100 feet) away from the working area. Keep an eye out for
                     animals as well (9).


            4.5.5    Before starting work the cut-off saw must be checked for perfect
                     function and operating safety in aaccordance with regulations.

SV00068GB                                18
                                                                 Safety precautions
                    In particular, make sure that the cutting blade is in good conditions
                    (replace immediately if torn, damaged or bent), the cutting blade is
                    properly mounted, the protective hood is locked in place, the V-belt has
                    the proper tension, the throttle moves easily and the half-throttle lock
                    button functions properly, the handles are clean and dry, and the
                    combination switch functions properly.
            4.5.6   Start the cut-off saw only after complete assembly and inspection.
                    Never use the cutt-off saw when it is not completely assembled.

      4.6   Cutting blades

            4.6.1   The protective hood must always be on! Change cutting blades
                    only with the engine off!
                    Always make sure to observe the „direction of rotation“ markings.
                    When using diamond cutting blades.


            4.6.2   Cutting blades have been designed exclusively for radial loads. Never
                    use the side face of the cutting blade for grinding purposes, as there is
                    danger of blade fracture.

                              min. 5 m
                              (16 feet)


                    Never change direction (turning radius less than 5 meters (16
                    feet), exert lateral (sideways) pressure, or cant the cut-off saw
                    during cutting applications (11)!
            4.6.3   Use a cutting blade only for cutting the materials it is intended for. The
                    proper type of blade must be selected for either metals or concrete.

SV00068GB                                 19
Safety precautions
            4.6.4    The arbour hole (bore) of the cutting blade must fit the shaft exactly. If
                     the arbour hole is larger than the shaft diameter, a spacer ring must be
            4.6.5    Free-hand cutting blades with a blade diameter of 355 mm (14“) must
                     be approved for speeds of up to 4370 1/min (rpm) or80 m/s (260 ft./
                     sec); blades with a blade diameter of 300 mm (12“) must be approved
                     for speeds of up 5100 1/min (rpm) or 80 m/s (260 ft./sec).


            4.6.6    The cutting blade must be free of defects (12). Make sure by sound
                     testing with a piece of wood. Do not use defective cutting discs.
                     Always tighten the cutting blade‘s mounting bolt to a torque of 30
                     Nm (22.2ft.lbs.). Otherwise, the cutting blade could warp.
            4.6.7    Make sure you have a steady footing before starting the cutting blade.


            4.6.8    Put the cut-off saw into operation only as described in this manual (13).
                     Always place your left foot in the rear handle and grasp the other
                     handle firmly (with thumb and fingers). Other starting methods are not
            4.6.9    When starting the cut-off saw it must be well supported and securely
                     held. The cutting blade must not be touching anything.
            4.6.10   If the cutting blade is new, test it by running it at least 60 seconds at
                     top speed. When doing this, make sure that no persons or body parts
                     are in the extended swing range of the cutting blade, in case it is
                     defective and flies apart.

SV00068GB                                 20
                                                                Safety precautions
            4.6.11 When working with the cut-off saw always hold it with both
                   hands. Take the back handle with the right hand and the tubular
                   handle with the left hand. Hold the handles tightly with your thumbs
                   facing your fingers.

            4.6.12 ATTENTION: When you release the throttle lever the cutting blade
                   will keep spinning for a short period of time (free-wheeling effect.).

            4.6.13   Always make sure that you have a safe footing.

            4.6.14   Hold the cut-off saw such that you will not breathe in the exhaust gas.
                     Do not work in closed rooms or in deep holes or ditches (danger of
                     poisoning by fumes).

            4.6.15 Immediately switch off the cut-off saw if you observe any
                   changes in its operating behavior.



                                                              *Replacing    the cutting blade
                                                              *Repositioning   the cutting arm
                                                              *Work   pause

                      14                                             of operation

            4.6.16 Stop the engine (14) before checking the V-belt‘s tension or
                   retightening the V-belt, before replacing a cutting blade, before
                   changing the cutting arm (inboard to outboard or vice versa) and
                   before eliminating malfunctions.

            4.6.17   Turn off the engine immediately and check the cutting blade if you hear
                     or feel any change in cutting behaviour.

            4.6.18   Turn off the cut-off saw when taking a break or stopping work (14).
                     Place the unit in such a way that the cutting blade is not touching
                     anything and cannot endanger anyone.

            4.6.19   Do not put the overheated cut-off saw in dry grass or on any
                     inflammable objects. The muffler is very hot (danger of fire).

            4.6.20 ATTENTION: After wet cutting, first turn off the water feed and then let
                   the blade run at least another 30 seconds, to fling off the remaining
                   water and prevent corrosion.

SV00068GB                                21
Safety precautions
      4.7   Kickback and lock-in

            4.7.1   There is a danger of kickback and lock-in. When working with the cut-
                    off saw.


            4.7.2   Kickback occurs when the top of the cutting blade is used for cutting
            4.7.3   This causes the cut-off saw to be thrown back toward the user with
                    great force and out of control. Risk of injury!
                    To prevent kickback, observe the following:
            4.7.4   Never cut with the section of the cutting blade shown in figure 15.
                    Be especially careful when reinserting the disc into cuts that have
                    already been started!
            4.7.5   Lock-in occurs when the cut narrows (crack, or workpiece under
            4.7.6   This causes the cut-off saw to suddenly jump forward, out of control
                    and with great force. Risk of injury!
                    To prevent lock-in, observe the following:
            4.7.7   When reinserting the disc into previous cuts, have the cut-off saw
                    running at top speed. Always cut at top speed.


            4.7.8   Always support the workpiece so that the cut is under pulling tension
                    (16), so that the cut does not press together and jam the cutting blade
                    as it proceeds through the material.

SV00068GB                               22
                                                                 Safety precautions
            4.7.9    When starting a cut, apply the cutting blade to the workpiece with care.
                     Do not just shove it into the material.

            4.7.10   Never cut more than one piece at a time! When cutting, make sure that
                     no other workpiece is touched.

      4.8   Working behavior/Method of working

            4.8.1    Before starting work, check the work area for any hazards (electrical
                     wires, inflammable substances). Clearly mark the work area (for
                     example with warning signs or by cordoning off the area).

            4.8.2    When working with the cut-off saw hold it firmly by the front and rear
                     handles. Never leave the cut-off saw unattended!

            4.8.3    Whenever possible run the cut-off saw at the rated arbour speed (see
                     „Technical Data“).

            4.8.4    Only use the cut-off saw during good light and visibility periods. Be
                     aware of slippery or wet areas, and of ice and snow (risk of slipping).

            4.8.5    Never work on unstable surfaces. Make sure that there are no
                     obstacles in the working area, risk of stumbling. Always ensure that
                     you have a safe footing.


            4.8.6    Never cut above your shoulder height (17).

            4.8.7    Never stand on a ladder to cut (17).

            4.8.8    Never use the cut-off saw while standing on scaffolding.

            4.8.9    Do not lean over too far when working. When putting down and picking
                     up the cut-off saw, do not bend over from the waist, but instead bend
                     in the knees. Save your back!

SV00068GB                                23
Safety precautions


            4.8.10   Guide the cut-off saw in such a way that no part of your body is within
                     the extended swing range of the blade (18).

            4.8.11   Use cutting blades only for the materials for which they are designed!

            4.8.12   Do not use the cut-off saw to lift up and shovel away pieces of material
                     and other objects.

                     Important injury hazard! Before cutting, remove all foreign objects,
                     such as rocks, gravel, nails etc. from the cutting area. Otherwise, such
                     objects can be flung away by the blade with great speed.

            4.8.13   When cutting workpieces down to length use a firm support. If
                     necessary, secure the workpiece from slipping, but do not steady it
                     with your foot or allow another person to hold it.

            4.8.14   When cutting round items, always secure them against rotation.

            4.8.15   When guiding the cut-off saw by hand, use the outboard position of the
                     cutter arm only when actually necessary. Otherwise, always use the
                     inboard position. This gives the unit a better balance, for reduced
                     operator fatigue.

      4.9   Cutting metals


                     Always wear approved respiratory protection!

                     Materials that can release toxic substances may be cut only after
                     notifying the proper authorities and under their supervision or
                     that of a person appointed by them.

SV00068GB                                24
                                                                 Safety precautions



                    The rapid rotation of the cutting blade heats metal and melts it at
                    the point of contact. Swing the guard as far down as possible
                    behind the cut (19) in order to direct the stream of sparks forward,
                    away from the operator (fire hazard).

            4.9.1   Determine the direction of cutting, mark the cut and apply the blade to
                    the material at moderate speed, to cut a guide groove before going to
                    top speed and applying more pressure to the cut-off saw.

            4.9.2   Keep the blade straight and vertical. Do not tip it, as this can break it.

            4.9.3   The best way to get a good, clean cut is to pull or move the cut-off saw
                    back and forth. Do not simply press the blade into the material.


            4.9.4   Thick round stock is best cut in stages (20).

            4.9.5   Thin tubing and pipes can be cut with a simple downward cut.

            4.9.6   Treat large-diameter pipes as round stock. To prevent tipping and for
                    better control, do not let the blade sink too deeply into the material.
                    Instead, always cut shallow around the whole piece.

            4.9.7   Worn blades have a smaller diameter than new blades, so that at the
                    same engine speed they have a lower effective circumferential speed
                    and therefore do not cut as well.

SV00068GB                                25
Safety precautions


            4.9.8    Cut I-beams and L-bars in steps; see Figure 21.

            4.9.9    Cut bands and plates like pipes: along the wide side with a long cut.


            4.9.10   When cutting material under stress (supported material or material in
                     structures), always make a notch in the thrust (pressure) side, and
                     then cut from the tension side, so that the blade does not lock in (22).
                     Secure cutoff material from falling!


                     If there is a chance that the material is under stress, be prepared
                     for it to kick back. Make sure you can get out of the way if you
                     have to!

                     Be particularly careful in scrap-metal yards, junkyards, at
                     accident sites, and with haphazard piles of material. Precariously
                     balanced pieces or pieces under stress can act in unpredictable
                     ways, and may slide, jump out, or burst. Secure cutoff material
                     from falling (22)! Always exercise extreme caution and use only
                     equipment that is in perfect working order.

                     Observe the accident-prevention rules and regulations of your
                     employer and/or insurance organization.

SV00068GB                                26
                                                                 Safety precautions
      4.10 Cutting masonry concrete, asbestos or asphalt

                     Always wear approved respiratory protection!
                     Asbestos and other materials that can release toxic substances
                     may be cut only after notifying the proper authorities and under
                     their supervision or that of a person appointed by them. When
                     cutting prestressed and reinforced concrete piles, follow the
                     instructions and standards of the responsible authorities or the
                     builder of the structural member. Reinforcement rods must be cut
                     in the prescribed sequence and in accordance with applicable
                     safety regulations.
                     Mortar, stone, and concrete develop large quantities of dust during
                     cutting. To increase the lifetime of the cutting blade (by cooling), to
                     improve visibility, and to avoid excessive dust creation, we strongly
                     recommend wet cutting instead of dry cutting.
                     In wet cutting, the blade is watered at an equal rate on both sides by a
                     trickle of water. WACKER offers the right accessories for all wet cutting
                     applications (see also “SPECIAL ACCESSORIES“).
            4.10.1   Remove foreign objects such as sand, stones and nails found within
                     the working area.
                     Caution: Watch out for electric wires and cables!


                     The rapid rotation of the cutting blade at the point of contact
                     throws fragments out of the cut groove at high speed. For your
                     safety, swing the protective hood down as far as possible behind
                     the cut (23), so that material fragments are thrown forward, away
                     from the operator.
            4.10.2   Mark the cut, and then make a groove about 5 mm deep (just under
                     0,2“) along the entire length of the planned cut. This groove will then
                     guide the cut-off saw accurately guring the actual cutoff.

SV00068GB                                27
Safety precautions



                     For long, straight cuts we recommend using a guide cart (24, see also
                     “SPECIAL ACCESSORIES“). This makes it much easier to guide the
                     unit in a straight line with less effort.


            4.10.3   When cutting slabs to size, you need not cut through the entire material
                     thickness (creating unnecessary dust). Instead, simply make a shallow
                     groove, and then knock off the excess material cleanly on a flat surface


                     When cutting into lengths, cutting through material, making cutouts,
                     etc., always make sure to plan the direction and sequence of cuts in
                     such a way that the blade does not get jammed by the cut-off piece,
                     and that no persons can be injured by falling pieces.

SV00068GB                                  28
                                                                 Safety precautions
      4.11 Transport and storage


            4.11.1 Always turn off the cut-off saw when transporting it or moving it
                   from place to place on a site (26).
            4.11.2   Never carry or move the unit with the engine running or the blade
            4.11.3   Carry the unit only by the tubular (middle) handle with the cutting blade
                     pointing behind you (26). Avoid touching the exhaust muffler (burn
            4.11.4   When moving the cut-off saw over longer distances, use a
                     wheelbarrow or wagon.
            4.11.5   When transporting the cut-off saw in a vehicle, make sure it is securely
                     positioned in such a way that no fuel can leak out. Always remove the
                     cutting blade before transporting the unit in a vehicle.
            4.11.6   The cut-off saw should be stored safely in a dry place. It must not be
                     left outdoors! Always dismount the cutting blade before storage. Keep
                     the cut-off saw away from children.
            4.11.7 Before long-term storage and before shipping the cut-off saw ,
                   follow the instructions in the chapter on “Periodic care and
                   maintenance“. ALWAYS empty the fuel tank and run the
                   carburetor dry.
            4.11.8   When putting cutting bladess in storage, be careful to:
            4.11.9   Clean and dry them well.
            4.11.10 Store them lying down flat.
            4.11.11 Avoid dampness, freezing temperatures, direct sunshine, high
                    temperatures and temperature fluctuations, as these can cause
                    breakage and splintering.
            4.11.12 Always check new cutting blades or blades that have been in
                    storage to make sure that they are free of defects.

SV00068GB                                29
Safety precautions
      4.12 Maintenance


            4.12.1 Switch off the cut-off saw (27) and pull out the plug cap Before
                   performing maintenance work.

            4.12.2   Always check the cut-off saw before using it to make sure that it is in
                     good working order. In particular, make sure that the cutting blade is
                     properly mounted. Make sure that the cutting blade is undamaged and
                     suitable for the job it will be used for.

            4.12.3   Operate the cut-off saw only at a low noise and emission level. For this
                     ensure the carburetor is adjusted correctly.

            4.12.4   Clean the cut-off saw regularly.

            4.12.5   Check the fuel tank cap regularly for good sealing.

                     Ovserve the accident prevention instructions issued by trade
                     associations and insurance companies. NEVER make any
                     modifications to the cut-off saw! You will only be putting your
                     own safety at risk!

                      28                        SERVICE
                     Perform only the maintenance and repair works described in the
                     operator‘s manual. All other work must be carried out by WACKER

                     Use only original WACKER spares and accessories.

                     The use of non-WACKER spares, accessories, or cutting blades
                     increases the risk of accident. We cannot accept any responsibility for
                     accidents or damage occurring in association with the use of
                     accesories other than original WACKER.

SV00068GB                                30
                                                               Safety precautions
      4.13 First aid


                  For the event of a possible accident, please make sure that a first aid
                  kit is always immediately available close by. Immediately replace any
                  items used from the first aid box.

                  When calling for help, give the following information:

              ∗   Place of the accident

              ∗   What happened

              ∗   Number of injured people

              ∗   Kind of injuries

              ∗   Your name!


                  Individuals with circulatory problems who are exposed to excessive
                  vibration may experience injury to blood vessels or the nervous

                  Vibration may cause the following symptoms to occur in the fingers,
                  hands or wrists: “Falling asleep“ (numbness), tingling, pain, stabbing
                  sensation, alteration of skin colour or of the skin.

                  If any of these symptoms occur, see a physician!

SV00068GB                              31
Technical data
5.    Technical data

                                                                            BTS 930L3                 BTS 935L3
          Item no.                                                          0008987 ...               0008988 ...
          Displacement                                     cm3   (cu in)                  64 (3,9)
          Bore                                                mm (in)                     47 (1,85)
          Stroke                                              mm (in)                     37 (1,46)
          Max. power                                          kW (hp)                     3,3 (4,5)
          Max. torque                                      Nm (ft.lbs.)                   4,0 (3,0)
          Idling speed                                     1/min [rpm]                        2.500
          Clutch engagement speed                          1/min [rpm]                        3.800
          Engine speed limitation                          1/min [rpm]                        9.350
          shaft speed                                      1/min [rpm]                        4.300

          Sound pressure level LpA eq per EN 1454 1) 4)          dB (A)                        97

          Sound power level                                        LWA                  109 db(A)
          Vibration acceleration ah,w per EN 1454
           - Tubular handle (idle/rated spindle speed)                                        6/5
           - Rear handle (idle/rated spindle speed)               m/s2                        8/6
          Carburetor (diaphragm carburetor)                Typ (Type)            TILLOTSON HS-273 A
          Ignition system (with speed limitation)          Typ (Type)                   electronic
          Spark plug                                       Typ (Type)      NGK BPMR 7A / BOSCH WSR 6F /
                                                                                CHAMPION RCJ 6Y
          Electrode gap                                       mm (in)                   0,5 (.020)
          Fuel consumption at max. load per ISO 8893               l/h                         2,1
                                                             (US qt/h)                        (2,2)
          Specific consumption at max. load per                g/kWh                          500
          ISO 8893                                           (oz./hph)                        (13)
          Fuel tank capacity                                 l (US qt)                    1,1 (1,2)

          Mixture ratio fuel/two-stroke oil 5)                                                50:1

          Cutting blade fer max. 80 m/s (260 ft/sec.) 2)      mm (in)      300 / 20,0 / 53)          350 / 25,4 / 53)
                                                                           (12/0,787/0,2)              (14/1/0,2)
          Arbor diameter                                      mm (in)       20,0 (0,787“)               25,4 (1“)
          Weight cut-off saw (empty tank, no blade)                  kg         10,0                      10,2
                                                                    (lb)        (22)                     (22,5)

       ) Figures derived in equal part from idle and max.-speed operation.
       ) Circumference speed at max. engine speed.
       ) Outside diameter/arbor hole/thickness.
       ) At the workplace (at user‘s ear).
       ) With 2-cycle engine oil according to API TC, JASO FC. or ISO L-EGD

TD00676GB                                           32
                                                                                            Technical data

                                                                           BTS 1030L3        BTS 1035L3
            Item no.                                                        0008989 ...       0008990 ...
            Displacement                                    cm3 (cu in)                     73 (4,5)
            Bore                                               mm (in)                      50 (1,97)
            Stroke                                             mm (in)                      37 (1,46)
            Max. power                                         kW (hp)                      4,2 (5,7)
            Max. torque                                    Nm (ft.lbs.)                     5,0 (3,7)
            Idling speed                                   1/min [rpm]                        2.500
            Clutch engagement speed                        1/min [rpm]                        3.800
            Engine speed limitation                        1/min [rpm]                        9.350
            spindle speed                                  1/min [rpm]                        4.300

            Sound pressure level LpA eq per EN 1454 1)           dB (A)                        99

            Sound power level                                      LWA                      110 db(A)
            Vibration acceleration ah,w per EN 1454
             - Tubular handle (idle/rated spindle                                             7/5
            speed)                                                m/s2                        8/7
             - Rear handle (idle/rated spindle speed)
            Carburetor (diaphragm carburetor)               Typ (Type)            TILLOTSON HS-273 A
            Ignition system (with speed limitation)         Typ (Type)                      electronic
            Spark plug                                      Typ (Type)      NGK BPMR 7A / BOSCH WSR 6F /
                                                                                 CHAMPION RCJ 6Y
            Electrode gap                                      mm (in)                      0,5 (.020)
            Fuel consumption at max. load per              l/h (US qt/h)                    2,7 (2,9)
            ISO 8893
            Specific consumption at max. load per               g/kWh                         500
            ISO 8893                                          (oz./hph)                       (13)
            Fuel tank capacity                                l (US qt)                     1,1 (1,21)

            Mixture ratio fuel/two-stroke oil 5)                                              50:1

            Cutting blade fer max. 80 m/s (260 ft/sec.)        mm (in)      300/20,0/53)      350/25,4/53)
            2)                                                             (12/0,787/0,2)      (14/1/0,2)
            Arbor diameter                                     mm (in)     20,0 (0,787“)        25,4 (1“)
            Weight cut-off saw (empty tank, no blade)           kg ( lb)     10,0 (22)                10,2 (22,5)

      1) Figures derived in equal part from idle and max.-speed operation.

      2) Circumference speed at max. engine speed.

      3) Outside diameter/arbor hole/thickness.

       ) At the workplace (at user‘s ear).
       ) With 2-cycle engine oil according to API TC, JASO FC. or ISO L-EGD

TD00676GB                                             33
Denomination of components
6.    Denomination of components

                                    Identification plate
                                    Indicate when ordering spare parts!

T00962GB                       34
                                        Denomination of components
           1 Handle

           2 Filter cover for air filter and spark plug cap

           3 Cover lock

           4 Tubular handle

           5 Muffler

           6 Protective hood

           7 Protective hood handle

           8 V-belt tension adjusting screw

           9 Retaining nuts

           10 Base

           11 Carburetor adjustment opening

           12 Identification plate

           13 Fuel tank with handle

           14 Starter grip

           15 Combination switch Start/Stop (I/O), choke

           16 Stop knob for halfway throttle

           17 Safety locking button

           18 Throttle lever

           19 Fuel tank plug

           20 Fan housing with starting assembly

           21 Cutting blade

           22 Cutting blade fastening bolt

           23 Spring washer

           24 Lock bore for V-belt pulley

T00962GB                        35
Putting into operation
7.    Putting into operation


                            Always turn off the engine and pull off the spark plug
                            cap before doing any work on the cut-off saw! Always
                            wear protective gloves!
                            Start the cut-off saw only after complete assembly and

                  For the the following work, use the assembly tools included with

                                                         1.13/19 AF universal wrench
                                                         2. Allen key
                                                         3. Carburetor adjustment

                               1     2      3

                  Place the cut-off saw on a stable surface and carry out the following
                  assembly steps:

T00962GB                             36
                                                            Putting into operation
      7.1   Fitting cutting blades



                              Inspect the disc for damage, see SAFETY
                              INSTRUCTIONS. Unscrew screw (9) and remove the spring
                              washer (8). Place the cutting disc (5) on the arbour (7).

                   NOTE: The arbor hole of the cutting disk must fit the shaft precisely.
                   Use an adapter ring to compensate for a larger arbor hole.

                              When using a diamond cutting disc be sure to mount it so
                              that it rotates in the proper direction!


                   Place the spring washer (8) on the arbour and insert the screw (32/9)
                   and tighten by hand.
                   Slowly turn the cutting disc until the stop hole of the V-belt wheel is
                   visible in the cutting arm hole (10). Insert the Allen key (2) as far as it
                   will go. The shaft is now blocked.
                   Tighten the screw with the combination wrench (1).

                   NOTE: Tighten the screw firmly 30 + 2 Nm (22 + 1,5 ft.lbs.), as
                   otherwise the cutting wheel could slip during cutting applications.

T00962GB                                37
Putting into operation
      7.2   Tightening the V-belt/Checking V-belt tension


                  Exact V-belt tension is essential for maximum cutting
                  performance with minimum fuel consumption. Improper V-belt
                  tension will result in premature wear to the V-belt and V-belt
                  pulley or damage to the clutch bearing. Retighten new V-belt after
                  first running hour!


                  NOTE: The two fastening nuts (11) must be loosened before
                  tightening the V-belt or checking the tension.
                  To increase the belt tension, turn the tightening screw (12) to the right
                  (clockwise) with the combination wrench included with the cut-off saw
                  The belt tension is correctly adjusted when the nut (13) is centred on
                  the mark (14).
                             ATTENTION: After tightening/inspection, make certain to
                             tighten the fastening nuts (11) 30 + 2 Nm (22 + 1,5 ft.lbs.).

T00962GB                              38
                                                             Putting into operation
      7.3   Fuels

                    The cut-off saw uses mineral-oil products (gasoline and oil).
                    Be especially careful when handling gasoline.
                    Do not smoke. Do not allow gasoline to come near flames, sparks
                    or fire (explosion hazard).

                                             Gasoline               50:1


                                    1000 cm3   (1 liter)           20 cm3
                                     5000 cm   (5 liter)          100 cm3
                                    10000 cm3 (10 liter)          200 cm3
                                             Us-gal.1,0            2,5 fl.oz.
                                             Us-gal. 2,5           6,4 fl.oz.
                                             Us-gal. 5,0          12,8 fl.oz.

                                        The correct mixture ratio:
                                        50:1 50 parts gasoline to 1 part oil.


                    Fuel mixture
                    The cut-off saw is powered by a high-performance two-cycle engine. It
                    runs on a mixture of gasoline and two-cycle engine oil.
                    The engine is designed for unleaded regular gasoline with a min.
                    octane value of 91 ROZ. In case no such fuel is available, you can use
                    fuel with a higher octane value. This will not affect the engine.
                    In order to obtain an optimum engine output and to protect your
                    health and the environment use unleaded fuel only.

T00962GB                                39
Putting into operation
                  The 2-cycle engine oil must comply with API TC, JASO FC or ISO L-
                  EGD specifications.

                  NOTE: For preparing the fuel-oil mixture first mix the entire oil quantity
                  with half of the fuel required, then add the remaining fuel. Shake the
                  finished mixture thoroughly before pouring it into the saw‘s tank.

                  ATTENTION: Open the tank cap carefully, as pressure might have
                  built up inside!

                  It is not wise to add more engine oil than specified to ensure safe
                  operation. This will only result in a higher production of
                  combustion residues which will pollute the environment and clog
                  the exhaust channel in the cylinder as well as the muffler. In
                  addition, fuel consumption will rise and performance will

      7.4   Fuel storage

                  Fuels have only a limited shelf-life. Buy only as much as you will use
                  in 4 weeks.

                  Only store fuel in approved and marked containers.


                  AVOID SKIN AND EYE CONTACT

                  Mineral oil products degrease your skin. If your skin comes in contact
                  with these substances repeatedly and for an extended period of time,
                  it will dry out. Various skin diseases may result. In addition, allergic
                  reactions are known to occur.

                  Eyes can be irritated by contact with oil. If oil comes into your eyes,
                  immediately wash them with clear water.

                  If your eyes are still irritated, see a doctor immediately!

T00962GB                               40
                                                         Putting into operation
      7.5   Refuelling

                    38                             Fuel mixture


                  Be careful and cautious when handling fuels.

                  The engine must be turned off and cooled down!

                  Carefully clean the area around the fuel-tank filler neck to keep dirt
                  from getting in the tank.

                  Place the unit on its side on an even surface.

                  Unscrew the tank cap and fill tank with fuel mixture. Take care to avoid

                  Tightly screw on the plug.

                  Clean tank cap and surrounding area after refuelling. Never start
                  or operate the cut-off saw in the same place as it was fuelled!

T00962GB                               41
Putting into operation
      7.6   Starting the engine



                                                                     3 meters
                                                                     (10 feet)


                  Observe the SAFETY INSTRUCTIONS under all circumstances!
                  Start the cut-off saw only after complete assembly and
                  Move at least 3 m (10feet) away from the place where you fuelled
                  the cut-off saw.
                  Make sure you have a good footing, and place the cut-off saw on
                  the ground in such a way that the cutting disc is not touching


                  Turn protective hood (3) to optimum position according to cutting
                  application (see drawing).
                  Grab handle (2) and move protective hood (3) to any position desired
                  between stops in either direction..

T00962GB                             42
                                                           Putting into operation
                  By all means make sure that outer edge of stop plate (4) is parallel to
                  the edge of the protective hood (see arrows).
                  Visit a specialized work shop if this should not be the case.

      7.7   Cold-starting


                  Move the combination switch (5) upwards (choke position).
                  Grasp handle (hand pressure actuates the grip throttle lever lock (7)).
                  Push the throttle (8) in all the way and hold it.
                  Press the throttle lock (6) and release the throttle (8) (the throttle lock
                  will hold the throttle at half-throttle position).


                  Grasp the tubular handle firmly with one hand and press the cut-off
                  saw firmly against the ground:
                  Place the tip of your left foot in the rear handle.
                  Slowly pull out the starter rope until you notice resistance (the piston is
                  positioned before the top dead centre).
                  Now pull the starter rope with a fast and forceful movement until you
                  hear the first ignition.

T00962GB                               43
Putting into operation
                  ATTENCION: Do not pull out the starter rope more than approx. 50 cm
                  (20 feet), and lead it back by hand.
                  Move the combination switch (42/5) to the position “I“.
                  Keep pulling the starter rope until the engine starts running.
                  As soon as the engine is running, press the throttle (42/8) to release
                  the half-throttle lock (42/6), allowing the engine to idle.

      7.8   Warm-starting

                  As described under „Cold starting“, except without moving the
                  combination switch (42/5) to the choke position.

      7.9   Stopping the engine


                  Push the combination switch (9) down to position

      7.10 Adjusting the carburetor

                                               Set the idling speed with a screwdriver (width
                                               of blade: 4 mm) (0,16“).
                                               The screwdriver shown has a molded-on lug to
                                               assist in adjustment.


                            NOTE: The cut-off saw has been equipped with an
                            electronic ignition to limit the speed. The carburetor
                            also has a fixed jet which cannot be adjusted.
                            At the factory the idling speed has been set to approx.
                  2.500 1/min, but the running-in process of a new engine may
                  require slight readjustment of the idling speed.

T00962GB                              44
                                                    Putting into operation


           The following steps must be carried out: For the correct
           adjustment of the idling speed
           Start the engine and run it until it is warm (about 3 - 5 minutes).


           Carry out carburetor adjustment with the scope of delivery.
           Readjusting the idle speed
           Proceed as follows if the cutting blade is turning while the engine is
           idling: turn the throttle valve‘s stop screws (2) outwards until the cutting
           blade stops moving. Turn the screw back in if the engine stops running
           while idling.
           Stop engine

T00962GB                        45
8.    Maintenance


                    Before doing any work on the cut-off saw turn off the engine,
                    remove the cutting blade, pull the plug cap off the spark plug and
                    wear protective gloves!
                    Start the cut-off saw only after complete assembly and

                    Because many of the parts and assemblies not mentioned in this
                    Instruction Manual are vital to the safety of the unit, and because
                    all parts are subject to a certain amount of wear and tear, it is
                    important for your own safety that you have the unit checked and
                    maintained regularly by a WACKER service station.
                              If the cutting blade should have broken during a cutting
                              application, take the cut-off saw to a WACKER service
                              station for its repair before using the machine again!

T00963GB                               46
      8.1   Changing the V-belt


                  Loosen nuts (3).
                  Loosen the tightening screw (1) (counter-clockwise) until the end of the
                  screw (2) is visible in the gap.
                  Unscrew the nuts (3) and remove the cover (4).
                  Remove the screws (5) and (7) and remove the side cover (6).

                            Screw (5) is longer than screws (7). Make sure to put
                            them back in the right places during reassembly!


                  Loosen the screws (8) and remove the crankcase cover (9).
                  Remove the old belt (10) or belt pieces. Clean out the inside of the
                  cutting arm with a brush.
                  Put in a new V-belt.

                  Reassemble the crankcase housing cover (9), side cover (50/6) and
                  cover (50/4) in the reverse order.
                  To tighten the V-belt see “Tightening the V-belt / Checking V-belt

T00963GB                              47
      8.2   Cleaning the protective hood

                                    NOTE: See “Fitting cutting blades“ for
                                    assembly of blades.


                   Over time, the inside of the protective hood can become caked with
                   material residue (especially from wet cutting), which if allowed to
                   accumulate can hinder the free rotation of the cutting blade. For this
                   reason the hood must be cleaned out from tim to time.
                   Take off the cutting blade with spring washer and remove the
                   accumulated material from inside the hood with a strip of wood or
                   similar implement.
                   Clean the shaft and all disassembled parts with a cloth.

      8.3   Cleaning/changing the air filter


                   Turn the cover lock (11) to the „Unlocked       “ position and carefully
                   remover the filter cover (12).
                   Two sealing rings (54/15) are located between the filter cover (12) and
                   the covering cap (54/14).

T00963GB                               48


           Loosen the screws (13) and remove the covering cap (14).
           Clean the sealing rings (15) with a small brush and check them for


           Remove prefilter (17) from the filter cover.
           Pull air filter insert (18) from the hood.
           Remove the inner filter (16) from the intake opening.
           Do not allow dirt to get into the carburetor!
           Set the combination switch to “Choke“ or cover the carburetor with a
           clean cloth.

T00963GB                      49
      8.4   Prefilter and air cleaner insert



                   Clean prefilter (1/7) daily ore more often if in the pesence of a lot of
                   dust. Replace latest after 20 hours running time!

                   Clean air cleaner insert (2/8) once every week, replace every 100
                   hours running time! This means that with proper maintenance the air
                   cleaner insert needs be replaced after the prefilter has been replaced
                   five times.

                   Cleaning prefilter and air cleaner insert

                   Knock the contaminated prefilter (1/7) against a clean surface or wash
                   in a luke warm soap sud of commercially available dish washer
                   detergent. Do not clean with fuel. Let prefilter dry thoroughly. The
                   air cleaner insert (2/8) filters the intake air throughtan extremely fine
                   paper filter lamellar system and should not be washed under any
                   circumstances. Open up the lamellas of the air cleaner insert slightly
                   and carefully knock against a clean surface.

                   Additional note:

                   The prefilter may be humidified with oil to increase its filtering
                   performance. Follow manufacturer‘s instructions!


                   If the air filter becomes damaged, replace immediately!

                   Pieces of cloth or large dirt particles can destroy the engine!

T00963GB                               50
      8.5   Replacing the spark plug

                  Do not touch the spark plug or plug cap if the engine is running
                  (high voltage).
                  Switch off the engine before starting any maintenance work.
                  A hot engine can cause burns. Wear protective gloves!
                  The spark plug must be replaced in case of damage to the insulator,
                  electrode erosion (burn) or if the electrodes are very dirty or oily.
                  ATTENCION: Use only BOSCH WSR 6F spark plug, CHAMPION
                  RCJ-6Y or NGK BPMR 7A.
                  The use of a non-approved spark plug may result in damage to the
                  ignition system.


                  Turn the cover lock (6) to the “Unlocked      “ position and carefully
                  remove the filter cover (7).
                  Flip up spark plug cover (8). Pull plug cap (9) off spark plug. Remove
                  spark plug only by using universal wrench delivered with machine.
                  Electrode gap
                  The electrode gap must be 0.5 mm (0,020“).

T00963GB                              51
      8.6   Checking the ignition spark


                  Insert the combination wrench (9) between the hood and cylinder only
                  as shown.


                  Do not insert the combination tool into the spark plug hole, but make
                  contact only with the cylinder (otherwise you may damage the engine).

                  Using insulated pliers, hold the spark plug (10) (unscrewed but with the
                  plug cap on) against the combination tool (away from the spark plug

                  Switch the combination switch (11) to “I“.

                  Pull the starter rope hard.

                  If the function is correct, an ignition spark must be visible near the

T00963GB                               52
      8.7   Replacing the suction head


                  The felt filter (13) of the suction head can become clogged. It is
                  recommended to replace the suction head once every three months in
                  order to ensure unimpeded fuel flow to the carburetor.
                  Unscrew the fuel tank cap (12) and pull the loss-prevention stopper
                  Empty fuel tank.
                  To remove the suction head for replacement, pull it out through the
                  tank filler neck using a piece of wire bent at one end to form a hook.
                  ATTENCION: Do not allow fuel to come into contact with skin!

      8.8   Starter rope replacement


                  Loosen four screws (14). Remove the fan housing (15).
                  Unscrew 2 screws (16) and carefully remove air duct (17) from fan
                  Note and follow sequence (A-B-C-D).
                  Remove remainders of old rope (18).

T00963GB                              53


              Thread a new 1000 mm (40“) long and 4,0 mm (0,16“) diameter starter
              rope as shown in the drawing (do not forget washer (19) and then tie
              knots at both ends.

              Pull knot (20) into rope drum (21).

              ATTENCION: The knot or, as the case may be, the end of the rope
              should not jut out over the surface of the rope drum.

              Insert knot (22) into the starter handle (23).


              Guide the rope into the recess (24) on the rope drum and use the rope
              to turn the drum two turns in the direction shown by the arrow.

              Holding the rope drum in your left hand, straighten out the twist in the
              rope with your right hand, pull the rope tight, and hold.

              Release the rope drum. The drum‘s spring force will now wind the rope
              around the drum.

              Repeat procedure three times. The starter handle must stand out from
              the fan housing.

T00963GB                           54
                  NOTE: With the rope pulled all the way out, it must still be possible to
                  turn the pulley another 1/4 turn against the return spring.
                  ATTENCION! Injury hazard! When you pull out the starter rope
                  hold the starter handle firmly. It will whip back if the rope drum is
                  released by accident.
                  Assemble air duct in reverse order (see picture 63). Make sure that the
                  guide (25) is located inside the seat (26) at the fan housing.
                  When replaceing fan housing, it may be necessary to pull the starter
                  rope lightly so that the rope pulley catches.

      8.9   Replace the return spring


                  Take off fan housing (see chapter “Starter rope replacement“).
                  Remove air duct from fan housing (see chapter “Starter rope
                  Remove retaining ring (1) (see accessories for extemal retaining ring
                  Pull off rope drum (2).
                  Unscrew screws (3).
                  Carefully and evenly remove retum spring (4) from spring holder with
                  screw driver or similar tool. Be extremely careful, as return spring is
                  pretensed and could jump out of spring holder!
                  ATTENCION: Danger of bodily harm! Wear safety glasses and
                  safety gloves under all circumstances!

T00963GB                              55
                  Replacement retum springs are delivered inside a housing and
                  pretensed. CAUTION, the spring can jump out.

                  A spring that has jumped out can be placed back in the housing by
                  following the drawing (pay attention to the direction of rotation!).
                  The new return spring (4) must be lightly greased with multipurpose
                  grease before proceeding with mounting inside the fan housing. After
                  greasing insert retum spring (4), press in slightly so that the brackets
                  (5) snap into the seats. Screw in screw (3) and only tighten lightly. Tum
                  rope drum slightly when placing until it snaps in audibly. Mount
                  retaining ring. Coil starter rope (see chapter “starter rope

                  Assemble air duct (see picture 62). If the need arises, pull starter
                  handle lightly until the starting device grips wehn replacing the fan

      8.10 Cutting arm in inboard/outboard


                  NOTE: The cut-off saw is delivered with the cutting arm mounted in the
                  inboard position (1). For cutting up against obstacles, such as curbs or
                  walls, the cutting arm can be mounted to one side (outboard) (2). Use
                  this position only when actually necessary, and afterwards return the
                  cutting attachment to the inboard position. In this position the cut-off
                  saw has better balance, is easier to guide, and is not as fatiguing for
                  the operator.

T00963GB                              56
      8.11 Repositioning the cutting arm


                  Loosen nuts (5).

                  Loosen the tightening screw (3) (counter-clockwise) until the end of the
                  screw (4) is visible in the gap. Unscrew the nuts (5) and remove the
                  cover (6).


                  Lift out stop bolt (7) with universal wrench (8) as shown in drawing until
                  protective hood (10) can be turned.

                  NOTE: The turning stop (65/7) is not active when the stop bolt (7) has
                  been pulled. The protective hood (10) can thus be turned further than
                  normally allowed by the turning stop (65/7).

                  Disengage V-belt and then remove cutting arm.

T00963GB                               57


              Press the cutting arm (12) in the side position onto the drive arm

              Guide the V-belt (13) over the V-belt wheel (14).


              Put the guard plate (15) on.

              Screw on nuts (16) and tighten by hand.

              To tighten the V-belt see “Tightening the V-belt / Checking V-belt

              Tighten the nuts (16) firmly with the combination wrench.


              When you reposition the cutting attachment, the direction of
              rotation of the cutting wheel changes.

              Diamond blacks must be filted according to the turning direction!

T00963GB                          58
      8.12 Instructions for periodic maintenance

                  To ensure long life, prevent damage and ensure the full functioning of
                  the safety features the following maintenance must be performed
                  regularly. Warranty claims can be recognized only if this work is
                  performed regularly and properly. Failure to perform the prescribed
                  maintenance work can lead to accidents!

                  Users of the cut-off saw must not perform any maintenance work not
                  described in this Instruction Manual. All such work must be carried out
                  by a WACKER service station.

                  General      Entire Power Cut       Clean exterior, check for damage. In case of
                                                      damage, have repaired by a qualified service
                                                      centre immediately

                               Cutting blade          Inspect regularly for damage and wear.

                               Protection hood        Clean, check position
                  Before       Cutting blade          Check for damages and make sure the correct
                  each start                          cutting blade for the planned aplication has
                                                      been filted.

                               V-belt                 Check V-belt tension.

                               Combination            Functional check.
                               switch, Safety
                               locking button,
                               Throttle lever

                               Fuel tank plug         Check for tightness.

                  Every day    Prefilter              Clean. (Replace after 20 running hours)

                               Idle speed             Check (cutting blade must not turn on idle).

                  Every        Fan housing            Clean to ensure proper air cooling.
                               Starter                Check for damage.

                               V-belt                 Check V-belt tension, inspect for damage and

                               Air filter cartridge   Clean. (Replace after 100 running hours)

                               Spark plug             Check and replace if necessary.

                               Muffler                Check tightness of mounting.

                  Every 3      Suction head           Replace.
                               Fuel tank              Clean.

                               Bearing                Clean and regrease.
                               Clutch drum

T00963GB                                   59
              Storage   Entire cut-off saw   Clean exterior, check for damage. In case of
                                             damage, have repaired by a qualified service
                                             centre immediately

                        Cutting blade        Remove and clean.

                        Fuel tank            Empty and clean.

                        Carburetor           Run empty.

T00963GB                            60
      8.13 Troubleshooting

                 Malfunction         System        Observation        Cause

                 Cutting blade       Clutch        Engine runs        Damage to clutch
                 does not start

                 Cutting blade       Carburetor,   Cutting blade      Incorrect idle speed, clutch
                 turns while         Clutch        turns              stuck
                 engine idles

                 Engine does         Ignition      Ignition spark     Malfunction in fuel supply
                 not start or only   system                           system, compression
                 with difficulty                                      system, mechanical

                                                   No ignition        Switch on STOP, fault or
                                                   spark              short-circuit in the wiring,
                                                                      plug cap or spark plug

                                     Fuel supply   Fuel tank is       Choke in wrong position,
                                                   filled             carburetor defective,suction
                                                                      head dirty, fuel line bent or

                                     Compres-      Inside             Cylinder base packing ring
                                     sion system                      defective, radial shaft
                                                                      packings defective, cylinder
                                                                      or piston rings defective

                                                   Outside            Spark plug does not seal.

                                     Mechanical    Starter does not   Spring in starter broken,
                                     malfunction   engage             broken parts inside the

                 Insufficient        Carburetor    Fuel tank is       Wrong carburetor
                 power                             filled Igntion     adjustment.

                 Engine does         Fuel supply   Fuel tank is       Wrong idling adjustment,
                 not start or only                 filled             suction head or carburetor
                 with difficulty                                      dirty. Tank venting defective,
                                                                      fuel line interrupted, cable
                                                                      defective, Stop switch
                                                                      defective. Starting valve

                 Low                 Serveral      Engine is idling   Air filter dirty, wrong
                 performance         systems                          carburetor adjustment,
                                     may be                           muffler clogged, exhaust
                                     involved                         channel in cylinder clogged.

T00963GB                                  61
9.    FBTS

      9.1    Guide cart

                   The WACKER guide cart makes it much easier to carry out straight
                   cuts, while simultaneously enabling almost untiring working. It can be
                   adjusted for the operator‘s height, and can be operated with the cutting
                   arm mounted in the inboard or outboard position. For easier refuelling
                   when using the trolley, we recommend adding an angled tank filler

                   The guide cart has been equipped with a water tank and a water spray
                   system; the water will bind the dust during the cutting process and will
                   also help to cool the cutting disc.

                   Notches have been added to the area of the clamp lever, thus making
                   it easier to adjust the cutting depth of the blade. One notch is
                   equivalent to 10 mm (0,4“) cutting depth.

T00964GB                               62
      9.2   Safety precautions

            9.2.1   The mounting brackets for the cut-off saw must be cleaned before
                    placing the BTS into the guide cart.

            9.2.2   The stop bolt must be correctly engaged to avoid a possible detaching
                    of the cut-off sawduring applications.

            9.2.3   Be careful to verify that both the clamp lever for the cutting depth
                    setting and the star-shaped knob for the handle height setting are
                    tightly screwed down during cutting applications.

            9.2.4   The guide cart should be cleaned with water after each use to avoid
                    possible malfunctions.

            9.2.5   Park the equipment on an even, horizontal surface during work breaks,
                    storage or transport. Also make sure that the equipment has been
                    secured against tipping over or rolling away.

            9.2.6   Push the throttle lever to the idle position (forwards) immediately after
                    ending the cutting process.

T00964GB                                63
10. Labels

             1   Fuel to oil ratio

             2   Wacker Logo

             3   Type

             4   Cover safety

             5   Protective hoad safety

SK00658GB                            64
                                                          EC - Confornity Certificate
                                 Wacker Construction Equipment AG , Preußenstraße 41, 80809 München
                             hereby certify that the construction equipment specified hereunder:
                             1. Category:

                                                        Portable gasoline cut-off saw
                             2. Type:

                                              BTS 930L3 / BTS 935L3         BTS 1030L3 / BTS 1035L3

                             3. Equipment item number:

                                          0008340 ... / 0008341 ...         0008339 ... / 0007975 ... / 0008912 ...
                                          0008987 ... / 0008988 ...              0008989 ... / 0008990 ...

                             4. absolute installed power:

                                                       3,2 kW                           4,2 kW

                             has been evaluated in conformity with Directive 2000/14/EC:
                              Conformity assessment    Measured sound power level                     Guaranteed sound
                              procedure                                                               power level

                                                          BTS 930/935L3        BTS 1030/1035L3

                                      Annex V               109 dB(A)               110 dB(A)                 111 dB(A)
                             and has been manufactured in accordance with the following directives:
                             * 2000/14/EG
                             * 89/336/EG
                             * 98/37/EG

                                                                                              Dr. Sick
                                                                                         Board of Directors
File certificate carefully


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