MS180

1. Introduction 2

2. Specifications 3

2.1 Engine 32.2 Fuel System 32.3 Ignition System 42.4 Cutting Attachment 42.5 Special Accessories 42.5.1 For User 42.5.2 For Service 42.6 Tightening Torques 5

3. Clutch, Chain Drive,Chain Brake andChain Tensioner 6

3.1 Chain Sprocket 63.2 Chain Catcher 63.3 Clutch 73.4 Disassembling

Chain Brake 83.5 Assembling

Chain Brake 93.6 Front Chain

Tensioner 103.7 Bar Studs 10

4. Engine 11

4.1 Exhaust Muffler 114.2 Leakage Test 114.2.1 Preparations 124.2.2 Pressure Test 124.2.3 Vacuum Test 134.3 Removing and

Installing Engine 144.4 Oil Seals 154.5 Cylinder 164.6 Piston 174.7 Piston Ring 184.8 Connecting Rod 194.9 Crankshaft 19

5. Ignition System 20

5.1 Spark Plug Terminal 205.2 Ignition Module 215.2.1 Ignition Timing 215.2.2 Removing and

Installing 215.3 Flywheel 225.4 Ground Wire 235.5 Short Circuit Wire 23

6. Rewind Starter 24

6.1 General 246.2 Fan Housing 246.3 Rewind Spring 256.3.1 Replacing 256.3.2 Tensioning 266.4 Starter Rope, Pawl,

Rope Guide Bush 26

7. AV Handle System 27

8. Master Control/Handle System 28

8.1 Switch Shaft 288.2 Contact Spring 288.3 Throttle Trigger/

Interlock Lever 298.4 Handle Frame 30

9. Chain Lubrication 31

9.1 Oil Pump 319.2 Worm 329.3 Oil Tank 329.4 Suction Hose/

Pickup Body 33

10. Fuel System 34

10.1 Air Filter 3410.2 Filter Housing 3410.3 Carburetor 3410.3.1 Leakage Testing 3410.3.2 Removing and

Installing 3510.4 Carburetor

Adjustment 3610.5 Pickup Body 3610.6 Tank Vent 3710.7 Fuel Tank 3710.8 Fuel Hose 38

11. Special ServicingTools and Aids 39

11.1 Special ServicingTools 39

11.2 Servicing Aids 40

© 1999, Andreas Stihl AG & Co., Waiblingen

017, 018CONTENTS

017, 018 1

This service manual containsdetailed descriptions of all therepair and servicing proceduresspecific to this power tool series.

There are separate handbooksfor servicing procedures for stand-ardized parts and assemblies thatare installed in several STIHLpower tool models. Reference ismade to these handbooks in theappropriate chapters of thismanual.

You should make use of theillustrated parts lists while carryingout repair work. They show theinstalled positions of the individualcomponents and assemblies.

Always use the latest edition ofthe parts to determine the partnumbers of any replacement partsrequired. Microfilmed parts list arealways more up to date thanprinted lists.’

A fault on the machine may haveseveral causes. Consult thetroubleshooting charts for allassemblies in the “GeneralServicing, Troubleshooting”handbook.

Refer to the “Technical Informa-tion” bulletins for engineeringchanges which have been intro-duced since publication of thisservice manual. Technical informa-tion bulletins also supplement theparts list until a revised edition isissued.

The special servicing tools men-tioned in the descriptions are listedin the last chapter of this manual.Use the part numbers to identifythe tools in the “STIHL SpecialTools” manual. The manual lists allspecial servicing tools currentlyavailable from STIHL.

Service manuals and all technicalinformation bulletins describingengineering changes are intendedexclusively for the use of STIHLservicing dealers. They must notbe passed to third parties.

Servicing and repairs are madeconsiderably easier if the power-head is mounted on the assemblystand (2) with the clamping rail (1).The machine is secured to thestand by means of the barmounting nuts (after removing thesprocket cover).

This enables the powerhead to beswivelled to the best position forthe ongoing repair and leaves bothhands free.

To work on the underside (e.g.removing the oil pump), turn themachine over and positionclamping rail on the assemblystand so that one screw engagesthe inner 10 mm hole.

Note: Pull the hand guard againstthe front handle before clampingthe machine in this position.

Always use original STIHLreplacement parts.They can be identified by theSTIHL part number,thep logoand the STIHL parts symbol (The symbol may appear alone onsmall parts.

1. INTRODUCTION

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2.1 Engine STIHL single-cylinder two-stroke engine with specialimpregnated cylinder bore

017 018Displacement: 30.1 cm3 (1.84 cu.in) 31.8 cm3

Bore: 37 mm (1.46 in) 38 mmStroke: 28 mm (1.10 in) 28 mm (1.10 in)Compression ratio: 9.5 :1 9.5 :1Engine power: 1.2 kW (1.6 bhp) 1.4 kW (1.9 bhp)Max. torque: 1.5 Nm (1.1 lb.ft) 1.5 Nm (1.1 lb.ft)

at n = 5500 rpm at n = 5500 rpmMean idle speed: 3,200 rpm 2,800 rpmMain bearings: Two deep-groove ball bearingsBig end bearing: Cylinder rollers

(cageless) Needle sleeveSmall end bearing: Needle cage Needle sleevePiston pin diameter: Ø 8 mm (0.3 in) Ø 8 mm (0.3 in)Connecting rod length: 51 mm (2 in) 51 mm (2 in)Rewind starter: Pawl systemReserve pull onrope rotor: min. 1/2 turnStarter rope: 3.0 mm (0.12 in) dia.,

800 mm (31.5 in) longClutch: Centrifugal clutch without liningsDiameter: 65 mm (2.56 in) 65 mm (2.56 in)Clutch engages at: 4,100 rpm 4,100 rpmCrankcase leakagetestat gauge pressure: 0,4 bar (5.8 psi)under vacuum: 0,4 bar (5.8 psi)

2.2 Fuel SystemCarburetor: Diaphragm carburetorStandard setting 017 018High speedadjusting screw H: 1) 2)

Low speedadjusting screw L: approx. 1 turn openCarburetor leakage testat gauge pressure: 0.4 bar (5.8 psi)Fuel tank capacity: 0.25 l (0.53 US pt)Octane number: min. 90 RON (USA/CAN: pump

octane min. 87 unleaded)Fuel mixture: Regular brand-name gasoline

and two-stroke engine oilMix ratio: 50:1 with STIHL 50:1 two-stroke engine oil

25:1 with other brand-nametwo-stroke, air-cooled engine oils

Air filter: Felt element

1) No H screw. Maximum engine RPM is permanently set by fixed jet (not adjustable)2) Carburetor with balanced idle system with only one adjusting screw (LD)

2. SPECIFICATIONS

017, 018 3

2.3 Ignition System Type: Electronic magneto ignition(breakerless) with integraltrigger unit

Air gap: 0.15 - 0.30 mm (0.006-0.012 in)Ignition timing: 1.0 - 1.6 mm (0.04-0.063 in) B.T.D.C.

at 8,000 rpmSpark plug (suppressed): CHAMPION RCJ 6Y

BOSCH WSR 6 FElectrode gap: 0.5 mm (0.020 in)Spark plug thread: M14 x 1.25Length of thread: 9.5 mm (0.37 in)Heat range: 200

2.4 Cutting Attachment Guide bars: STIHL Rollomaticwith nose sprocket

Bar tail: 3005Bar lengths: 30 and 35 cm (12 and 14 in)Oilomatic chain: 3/8" (9.32 mm) Picco-Micro MiniChain sprockets: 6-tooth spur sprocket

for 3/8" Picco pitchChain speed: 18.6 m/s (61 ft/sec) at 10,000 rpm

(with 6-tooth 3/8" P sprocket)Chain lubrication: Speed-controlled reciprocating

oil pump, no oil feed atidle speed

Oil tank capacity: 0.15 l (0.32 US pt)

2.5 Special Accessories

2.5.1 For User STIHL repair kit 1130 900 5000

2.5.2 For Service Carburetor parts kit 1130 007 1060

4 017, 018

Plastoform screws are used for polymer components and "DG" screws for lightmetal components.These screws form a permanent thread when they are installed for the first time. They can be removed andinstalled as often as necessary without detrimentally affecting the strength of the screwed assembly, providingthe specified tightening torque is observed.For this reason it is essential to use a torque wrench.

Fastener Thread For component Torque Remarkssize Nm lbf.ft

Spline screw IS-DG 5x24 Ignition module/cylinder 7.5 5.6

Spline screw IS-DG 5x24 Crankcase 8.0 5.9

Spline screw IS-DG 5x24 Fan housing/crankcase 4.5 3.3

Spline screw IS-DG 5x24 Crankcase/cylinder 9.5 7.0bar mounting

Collar screw M 8 Crankcase 16.0 11.8 1)

Flange nut M 12x1L Clutch 50.0 37.0

Flange nut M 5 Carburetor 3.5 2.6

Nut M 5 Muffler/cylinder 7.0 5.2

Flange nut M 8x1 Flywheel 27.5 20.3

M 14x1.25 Spark plug 25.0 18.5

Screw IS-P 4x12 Hand guard/fan housing 1.7 1.25 2)

Panhead Screw IS-DG 5x16 Engine housing/Spiked bumper 3.7 2.7

Screw IS-P 4x19 Handle molding/Handle frame 2.0 1.5

Use the following procedure when refitting a P or DG screw in an existing thread:

– Place the screw in the hole and rotate it counterclockwise until it drops down slightly.– Tighten the screw clockwise to the specified torque.This procedure ensures that the screw engages properly in the existing thread and does not form a new thread.

Remarks1) Screw must be secured with adhesive 0786 111 1101 (Loctite 243).2) Torque may be reduced by approx. 1 Nm (0.7 lbf.ft) when refitting a screw in an existing thread

Note: Screws secured with adhesive are easier to release if the adhesive is heated first with a hot air blower(hair dryer). Take care on polymer components.

2.6 Tightening Torques

017, 018 5

• Unscrew nuts and remove thechain sprocket cover.

• Disengage the chain brake bypulling the hand guard towardthe front handle.

• Remove the E-clip (1).

• Remove the washer (2).

• Pull off the chain sprocket.

• Take the needle cage out of thesprocket.

Reverse the above sequence toinstall the chain sprocket.

Note: Clean stub of crankshaft.Wash needle cage in clean whitespirit and lubricate with grease -see 11.2. Replace damagedneedle cage.

Rotate chain sprocket and applyslight pressure at the same sameuntil oil pump drive springengages properly.

Chain sprocket with integrallymolded chain catcher (1).

If the chain catcher has broken off(2), repair as follows:

• Ease the plug out of the frontright-hand AV element.

• Oil the cylindrical portion (1) ofthe replacement chain catcher.

• Push the chain catcher into theAV element (2) and engage thepeg (3) in the hole (4) at thesame time.

3. CLUTCH, CHAIN DRIVE, CHAIN BRAKE AND CHAIN TENSIONER3.1 Chain Sprocket 3.2 Chain Catcher

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Troubleshooting chart - see,,General Servicing, Trouble-shooting“ handbook.

- Remove the chain sprocket - see3.1.

- Squeeze the interlock lever andthrottle trigger.

• Move Master Control lever (1)down to lowest position.

• Turn twist lock (2) horizontal.

• Lift off the shroud (3).

• Pull spark plug boot (1) off thespark plug (2).

- Unscrew the spark plug.

• Push the locking strip (1) into thecylinder.

• Unscrew the clutch from thecrankshaft.

Caution: Clutch has a left-handthread.

- Disassemble and reassemblethe clutch - see ,,GeneralServicing, Troubleshooting“handbook.

• Screw clutch onto crankshaftand torque down to 50 Nm(37 lbf.ft).

- Remove locking strip fromcylinder.

- Install spark plug and torquedown to 25 Nm (18.5 lbf.ft).

- Refit spark plug boot on sparkplug.

Important: Turn ignition lead sothat it does not rest against thecylinder head.

• Fit shroud in retainers andturn twist lock to vertical position.

- Install chain sprocket - see 3.1.

3.3 Clutch

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017, 018 7

- Remove chain sprocket cover.

- Disengage chain brake.

• Ease the cover out of itsseat.

• Carefully pry the brake spring (1)off the anchor pin and unhook itfrom the bell crank (2).

• Lever the brake band out of theengine housing and detach itfrom the bell crank (1).

• Remove the screw from thehand guard.

• Ease the E-clip off the bell crankpivot pin.

- Slip the strap off the bell crankpivot pin.

• Push the strap to one side andremove it from the hand guardpivot pin.

• Remove the washer.

- Remove the shroud - see 3.1.

• Carefully ease the hand guard(1) and bell crank (2) off the pivotpins and lift them away together.

- Pull the bell crank out of thehand guard.

• Take out the flat spring.

- Inspect parts. Replace any wornor damaged parts.

3.4 Disassembling Chain Brake

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- Fit flat spring in position.

• Slide bell crank into end of handguard. The short arm of the bellcrank must point to top of handguard.

• Locate bearing boss of handguard (1) on pivot pin and fitother end over the housing.

• Fit bell crank (2) on pivot pin andpush it into position.

• Fit the washer.

• Place strap on pivot pin (1) andpush it in direction of arrow untilit engages the groove. Thenpush it over the pivot pin (2) andsecure with the E-clip.

• Attach brake band to the bellcrank.

- Lubricate sliding and bearingpoints of chain brake with STIHLmultipurpose grease or, prefera-bly, Molykote grease - see 11.2.

• Fit the brake band and press itinto the engine housing.

• Hook the brake spring onto thebell crank.

• Use the assembly tool (2) toattach the brake spring (1) to theanchor pin.

• Fit cover over chain brake andpress it home until it snaps intoposition.

3.5 Assembling Chain Brake

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017, 018 9

• Fit hand guard over boss on fanhousing.

- Insert screw and tighten to1.7 Nm (1.25 lbf.ft).

- Fit the shroud - see 3.1.


• Pull the cover out of the enginehousing.

• Unscrew the nut (1) from theadjusting screw (2) and take theadjusting screw out of the cover(3).

Reverse the above sequence toinstall the chain tensioner.


• Push the stud puller (1) onto thestud as far as it will go.

• Unscrew the stud.

- Coat thread of stud with Loctite -see 11.2.

- Insert stud and torque down to16 Nm (11.8 lbf.ft).

3.6 Front Chain Tensioner 3.7 Bar Studs

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This machine does not have aconventional crankcase.The engine consists of thecylinder, piston, crankshaft andengine pan.


• Unscrew nuts (1) from muffler.

• Remove the cover plate (2).

• Remove the spark arrestingscreen.

- Clean the spark arresting screenor fit a new one if necessary.

• Pull out the muffler.

• Remove the gasket.

• Take the screws out of theflange.

Reassemble in the reversesequence.

Defective oil seals and gaskets orcracks in castings are the usualcauses of leaks. Such faults allowsupplementary air to enter theengine and thus upset the fuel-airmixture.

This makes adjustment of theprescribed idle speed difficult, ifnot impossible.

Moreover, the transition from idlespeed to part or full throttle is notsmooth.

The engine housing can bechecked thoroughly for leaks withthe carburetor and crankcasetester and the vacuum pump.

4. ENGINE4.1 Exhaust Muffler 4.2 Leakage Test

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017, 018 11

- Remove the muffler - see 4.1.

• Fit the sealing plate (1) betweenthe screws.

• Push the flange (1) over thescrews.

• Fit the sleeves (2) on the screws.

- Fit the nuts and tighten themdown firmly.

Note: The sealing plate mustcompletely fill the space betweenthe two screws.

- Remove the carburetor - see10.3.2.

- Set the piston to top dead center(T.D.C.). This can be checkedthrough the intake port.

• Check that sleeve is in positionin manifold.

• Fit the test flange (1) in place ofthe carburetor.

• Connect tester’s pressure hoseto nipple on test flange.

- Make sure the spark plug isproperly tightened down.

• Close the vent screw (1) on therubber bulb.

- Use rubber bulb to pump air intothe engine housing until thegauge indicates a pressure of0.4 bar (5.8 psi). If this pressureremains constant for at least 20seconds, the engine housing isairtight.

4.2.1 Preparations 4.2.2 Pressure Test

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• However, if the indicatedpres-sure drops, the leak mustbe located and the faulty partreplaced.

Note: To find the leak, coat thesuspect area with oil andpressurize the engine housingagain. Bubbles will appear if a leakexists.

- Carry out the vacuum test - see4.2.3.

- After finishing the test, open thevent screw and disconnect thehose.

- Remove the test flange and refitthe carburetor - see 10.3.2.

- Remove the flange.

- Remove the sealing plate.

- Install the muffler - see 5.1.

Oil seals tend to fail when sub-jected to a vacuum, i.e. the sealinglip lifts away from the crankshaftduring the piston’s induction strokebecause there is no internalcounterpressure.

An additional test can be carriedout with the vacuum pump todetect this kind of fault.The preparations for this test arethe same as for the pressure test -see 4.2.1.

• Connect the vacuum pump’ssuction hose to test flange nipple.

- Make sure the spark plug isproperly tightened down.

• Close the vent screw (1) on therubber bulb.

• Operate lever (2) until pressuregauge indicates a vacuum of 0.4bar (5.8 psi).

Note: If the vacuum readingremains constant, or rises to nomore than 0.3 bar (4.25 psi) within20 seconds, it can be assumedthat the oil seals are in goodcondition.However, if the pressure continuesto rise (reduced vacuum in theengine housing), the oil seals mustbe replaced, even if no leaks weredetected in the pressure test.

- After finishing the test, open thevent screw and disconnect thehose.

- Remove the test flange and refitthe carburetor - see 10.3.2.

- Remove the flange.

- Remove the sealing plate.

- Install the muffler - see 4.1.

4.2.3 Vacuum Test

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Always check and, if necessary,repair the fuel system, carburetor,air filter and ignition system beforelooking for faults on the engine.

- Remove the muffler - see 4.1.

- Remove the clutch - see 3.3.

- Remove handle frame - see 8.4.


- Remove the flywheel - see 5.3.

• Pull off the worm with drivespring.

• Take the sleeve out of themanifold.

• Pull off the short circuit wire (1).

• Take out the screws (2).

• Remove the ignition module (3).

• Remove mounting screws fromunderside of engine.

• Remove engine sideways fromhousing and push the manifoldflange out of the intake openingatthe same time.


- To fit the manifold in the enginehousing intake opening, wind apiece of string (about 15 cm/6"long) around the back of the ma-nifold flange and pass the endsof the string through theintake opening.

• Place the engine in position,push the manifold against theintake opening and pull the endsof the string outward at the sametime.

The manifold flange is pulledthrough the engine housing intakeopening without any damage tothe manfold.

- Torque down engine mountingscrews to 9.5 Nm (7.0 lbf.ft).

- After completing assembly,adjust air gap between ignitionmodule and flywheel - see 5.2.2.

4.3 Removing and InstallingEngine

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It is not necessary to disassemblethe complete engine housing ifonly the oil seals have to bereplaced.

- Remove the engine - see 4.3.

Clutch side:

• Pry out the retaining ring.

• Apply the puller (1) (with No. 3.1jaws).

- Clamp the puller arms.

- Pull out the oil seal.

Important: Take special care notto damage crankshaft stub.

• If new oil seals have alreadybeen installed, use puller andNo. 3.1 jaws to remove theclamping ring (1). Pry the sealingring (2) out of the housing.

- Clean sealing face on crankshaftstub with standard commercial,solvent-based degreasantcontaining no chlorinated or halo-genated hydrocarbons - see 11.2.

- Pack cavity between sealing lipand oil seal with grease - see11.2.

- Thinly coat the outside diameterof the oil seal with sealant - see11.2.

- Position the oil seal so that theclamping ring faces upwards.

• Use the press sleeve (1) toinstall the oil seal.

- Fit the retaining ring in thecrankshaft groove.

Starter side:

• Apply the puller (1) as at theclutch side and pull out the oilseal.

Note: Remove the oil seal withclamping ring as described forclutch side.

- Clean sealing face on crankshaftstub with standard commercial,solvent-based degreasantcontaining no chlorinated or halo-genated hydrocarbons - see 11.2.

- Pack cavity between sealing lipand oil seal with grease - see11.2.

- Thinly coat the outside diameterof the oil seal with sealant - see11.2.

- Position the oil seal so that theclamping ring faces upwards.

• Screw guide sleeve (1) on to thecrankshaft stub.

4.4 Oil Seals

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• Use the press sleeve (1) to presshome the oil seal.

- Unscrew the guide sleeve.

- Install the engine - see 4.3.


• Take the ring (1) and manifold(2) off the intake port.

• Unscrew the engine pan mount-ing screws.

- Pull the engine pan off thecylinder.

Note: Fit the clamp (1) on theconnecting rod to prevent it slip-ping off the crankshaft while thepiston is being removed.

• Lift the crankshaft and pull thepiston out of the cylinder.

- Inspect the cylinder and replaceit if necessary.

Note: If a new cylinder has to beinstalled, always fit the matchingpiston. Replacement cylinders areonly supplied complete with pistonfor this reason.

- Thoroughly clean all residue ofsealant from the cylinder andengine pan mating faces.

- Lubricate piston and piston ringwith oil.

• Position the piston ring so thatthe radii at the ring gap meet atthe fixing pin in the piston groovewhen the ring is compressed.

4.5 Cylinder

1

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- Apply a thin coating of sealantto the outer diameters of the oilseals, see 11.2.

• Slide piston carefully into thecylinder.

Note: The piston ring iscompressed by the inner taper ofthe cylinder.

• Line up the crankshaft so thatthe long crankshaft stub (2)points to the right when viewedfrom the exhaust port (2).

• Apply a thin bead of sealant tothe engine pan mating face, see11.2.

Note: Follow manufacturer’sinstructions for use of sealant.

• Fit the engine pan so that theseat (1) for the oil pump is at thesame side as the long crankshaftstub (2).

- Insert screws and torque downto 9.5 Nm (7.0 lbf.ft).

• Push the manifold on to theintake port so that the peg (1)engages the hole (2).

- Install the engine - see 4.3.

- Pull the piston out of the cylinder- see 4.5.

• Use a scriber or similar tool toease the hookless snap rings outof the grooves in the pistonbosses.

• Use the assembly drift (2) topush the piston pin (1) out ofthe piston.

Note: If the piston pin is stuck, tapthe end of the drift lightly with ahammer. Important: Hold thepiston steady during this processto ensure that no jolts are transmit-ted to the connecting rod.

- Remove the piston from theconnecting rod.

4.6 Piston

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• Inspect piston ring and replace ifnecessary - see 4.7.

- Oil needle cage in the small end.

- Heat the piston on an electricheating plate to approx. 60°C(140°F).

• Slip the piston over the connect-ing rod so that the arrow (1) onthe piston head points towardsyou when the long stub (2) of thecrankshaft points to the left.

• Push the assembly drift (1), snalldiameter first, through the pistonand small end (needle cage) andline up the piston.

• Fit the piston pin (1) on theassembly drift (2) and slide itinto the piston (the pin slideshome easily if the piston is hot).

• Fit the snap rings. To do this,Apply the installing tool (1) to thepiston boss, hold the pistonsteady, center the tool shankexactly and press home until thesnap ring slips into the groove.

Note: For instructions on how touse installing tool, see ,,GeneralServicing, Troubleshooting“ hand-book.

- Install the piston - see 4.5.

- Remove the piston - see 4.5.

- Remove ring from piston.

• Use a piece of old piston ring toscrape the groove clean.

• Install the new piston ring in thegroove so that the radii faceupward.


4.7 Piston Ring

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- Remove the piston - see 4.6.

• Pull the oil seal (1) and ball bear-ing (2) off the short crankshaftstub.

• Remove the clamp from theconnecting rod.

• Remove the connecting rod fromthe crankshaft.

• Remove cylindrical rollers fromthe crankshaft.

Note: Cylindrical rollers are avail-able in three tolerance groups.Always replace cylindrical rollersin complete sets (13 per set) toensure that they are all of thesame tolerance group.

- Use grease, see 11.2, to stickthe cylindrical rollers to thecrankshaft.

- Slide the connecting rod intoposition and secure it with theclamp.

- Heat ball bearing to approx.50°C (120°F) and push it on tothe crankshaft stub as far asstop.

- Coat sealing lip of oil seal with oil.

- Slide oil seal on to crankshaftstub so that the clamping ringpoints outward (sealing lip alsopoints outward).


- Remove the connecting rod -see 4.8.

• Pry out the retaining ring (1).

• Pull off the oil seal (2) and ballbearing (3).

- Heat ball bearing to approx.50°C (120°F) and push it on tothe crankshaft stub as far asstop.

- Coat sealing lip of oil seal with oil.

- Slide oil seal on to crankshaftstub so that the clamping ringpoints outward (sealing lip alsopoints outward).

- Install the connecting rod - see4.8.

• Apply thin coating of sealant, see11.2, to outside diameter of oilseals.

4.8 Connecting Rod 4.9 Crankshaft

143R

A08

8

1

2

143R

A08

9

143R

A09

1

143R

A09

2

1 2 3

143R

A09

0

143R

A09

3

017, 018 19

Warning! Exercise extremecaution when carrying outmaintenance and repair work onthe ignition system. The highvoltages which occur can causeserious or even fatal accidents!

Troubleshooting on the ignitionsystem should always begin atthe spark plug. See ,,GeneralServicing, Troubleshooting“handbook.

The electronic (breakerless)ignition system basically consistsof an ignition module (1) andfly wheel (2).


• Pull the terminal (1) off thespark plug (2).

• Pull the ignition lead out of theretainer (3).

• Use pliers to grip the leg springand pull it out of the spark plugterminal.

- Unhook the leg spring from theignition lead.

• Pull spark plug terminal off theignition lead.

- Coat end of the ignition lead(about 20 mm/3/4") with oil.

- Fit spark plug terminal over theignition lead.

- Use pliers to grip the end of theignition lead inside the sparkplug terminal and pull it out.

• Pinch the hook of the leg springinto the center of the lead, i.e.about 8 mm (0.3") from the endof the lead.

• Pull the lead back into theterminal so that the leg springlocates properly inside it (seeillustration).

- Push the ignition lead into theretainer, see 5.5.

- Fit terminal on spark plug.


5. IGNITION SYSTEM 5.1 Spark Plug Terminal

143R

A09

5

33 1122

143R

A09

7

143R

A09

4

2

1

143R

A09

6

143R

A09

8

20 017, 018

The ignition module accommo-dates all the components requiredto control ignition timing. There areonly two electrical connections onthe coil body:

1. the high voltage output (1) withignition lead (2)

2. the connector tag (3) for theshort circuit wire

Accurate testing of the ignitionmodule is only possible withsophisticated test equipment. Forthis reason it is only necessary tocarry out a spark test in the work-shop. A new ignition module mustbe installed if no ignition spark isobtained (after checking thatwiring and stop switch are in goodcondition).

Ignition timing on the electronic(breakerless) magneto ignitionsystem is fixed at 1.3 mm (0.050")B.T.D.C. at 8,000 rpm and is notadjustable.

However, in view of the permis-sible tolerances in the electroniccircuit, it may vary between 1.0and 1.6 mm (0.040" and 0.060")B.T.D.C. at 8,000 rpm.

Since there is no mechanical wearin these systems, ignition timingcannot get out of adjustment. How-ever, an internal fault in the circuitcan alter the switching point insuch a way that a spark test willstill show the system to be in orderalthough timing is outside thepermissible tolerance. This willimpair engine starting and runningbehavior.


• Pull the terminal (1) off the sparkplug (2).

• Pull the ignition lead out of theretainer (3).

• Pull the short circuit wire off theconnector tag on the ignitionmodule.

• Remove the ignition modulemounting screws.

- Remove the ignition module.

5.2 Ignition Module 5.2.1 Ignition Timing 5.2.2 Removing and Installing

143R

A09

5

33 1122

143R

A09

9

33

1

22

143R

A10

014

3RA

101

017, 018 21

- Remove the spark plug terminal -see 5.1.

Note: The ignition lead is moldedto the ignition module.

- Place the module in position,insert the screws but do nottighten them down yet.

Note: Secure the ground wire withthe upper mounting screw.

• Slide the setting gauge (1)between the arms of the ignitionmodule and the flywheelmagnets.

- Press the ignition moduleagainst the flywheel and tightendown the mounting screws to atorque of 5.0 Nm (3.7 lbf.ft).

- Push the ignition lead into theretainer, see 5.5.

- Fit spark plug boot on spark plug.

Caution: Turn the ignition lead sothat it does not rest against thecylinder head.

- Fit the shroud.

Removing the flywheel:

- Use locking strip to block piston -see 3.3.

- Remove the fan housing - see6.2.

• Unscrew the flywheel nut.

• Pull the flywheel off the crank-shaft.

Note: If the flywheel cannot bepulled off by hand, screw thepuller (1) on to the crankshaftstub. Free off the flywheel bylightly tapping the end of thepuller. Unscrew the puller andremove the flywheel.

• Inspect the condition of the fly-wheel (1) and magnets (2). If youfind any damage (e.g. cracks,broken fan blades), fit a newflywheel.

Installing the flywheel:

Important: Clean the stub of thecrankshaft and the flywheel hubbore with a standard commercial,solvent-based degreasant contain-ing no chlorinated or halogenatedhydrocarbons - see 11.2.

- Fit the flywheel.

- Tighten down flywheel nut to27.5 Nm (20.2 lbf.ft).

Assembly of the remaining parts isnow a reversal of the disassemblysequence.

5.3 Flywheel

143R

A10

2

11 143R

A10

6

11

22

143R

A10

5

11143R

A10

314

3RA

104

22 017, 018


• Pull retainer (1) off the ignitionlead.

• Take the upper screw (2) out ofthe ignition module.

• Pull the ground wire off thecontact spring.


Note: After installing, push theground wire between the retaininglugs.Push ignition lead into the retainer,see 5.5.



• Pull the retainer (1) off theignition lead.

• Pull short circuit wire (2) off theconnector tag on the ignitionmodule.

• Pull short circuit wire out ofengine housing.

Install in the reverse sequence.

Note: After installing, push theshort circuit wire between theretaining lugs.

Push short circuit wire into recessnext to intake opening.

Place short circuit wire and groundwire in the retainer.Push the ignition lead into theretainer so that dimension ,,a“ isabout 60 mm (2.5").

5.4 Ground Wire 5.5 Short Circuit Wire

143R

A10

914

3RA

108

143R

A10

7

22 11

143R

A11

0

1122

143R

A11

214

3RA

113

143R

A19

0a

143R

A11

1

017, 018 23

If the action of the starter ropebecomes very stiff and the roperewinds very slowly or not com-pletely, it can be assumed thatthe starter mechanism is in orderbut plugged with dirt. At very lowoutside temperatures the lubri-cating oil on the rewind spring maythicken and cause the springwindings to stick together. Thishas a detrimental effect on thefunction of the starter mechanism.In such a case it is sufficient toapply a few drops of paraffin(kerosine) to the rewind spring.

Then carefully pull out the starterrope several times and allow it torewind until its normal smoothaction is restored.

If clogged with dirt or pitch, theentire starter mechanism, includ-ing the rewind spring, must beremoved and disassembled. Takespecial care when removing thespring.

Wash all parts in paraffin or whitespirit.

Lubricate the rewind spring andstarter post with STIHL speciallubricant, see 11.2, beforeinstalling.


• Remove fuel tank and oil tankfiller caps together with the capretainers.

- Drain both tanks.

• Take out the fan housing mount-ing screws.

• Pull the hand guard (1) off thepin (2) on the fan housing.

• Push the hand frame to one sideuntil the fan housing can beeased passed the corner (1) andremoved.

• Pull the fan housing away to therear.


6. REWIND STARTER6.1 General 6.2 Fan Housing

143R

A11

5

143R

A11

8

1

143R

A11

614

3RA

117

1

2

143R

A11

9

24 017, 018



- Pull out the starter rope about5 cm (2") and hold the rope rotorsteady.

- While still holding the rope rotorsteady, take three full turns offthe rope rotor.

- Pull out the rope with the startergrip and then let go of the roperotor.

Note: The rope rotor will spinback and relieve the tension of therewind spring. The rewind springwill not be under tension if thestarter rope is broken.

- Remove the rope rotor, see,,General Servicing, Trouble-shooting“ handbook, use pliersto remove any remaining piecesof spring from the fan housing.

Note: The replacement springcomes ready for installation andis held by a retainer. It should belubricated with a few drops ofSTIHL special lubricant beforeinstallation - see 11.2.

The retainer (1) slips off as therewind spring is pressed into thefan housing. Engage the anchorloop (2) over the lug in the fanhousing.

Caution: The rewind spring maypop out and uncoil during instal-lation.

- If the rewind spring has poppedout, refit it as follows:

• Position anchor loop about11 mm (0.4") (dimension ’a’)from the edge of the assemblytool (1).

• Fit the rewind spring in theassembly tool in the counter-clockwise direction, startingoutside and working inwards.

Note: The wooden assemblyblock can be placed over theassembly tool to simplify thisoperation.

- Slip the assembly tool withrewind spring over the starterpost.

• Push the rewind spring into thefan housing and then remove theassembly tool.

- Install the rope rotor - see,,General Servicing, Trouble-shooting“ handbook.

- Tension the rewind spring - see6.3.2.

6.3 Rewind Spring6.3.1 Replacing

VA14

3RA

122

VA

143R

A12

1

1

a

143R

A12

3

143R

A12

0

22

11

017, 018 25

• Make a loop in the starter rope.

• Grip the rope close to the rotorand use it to turn the rope rotorsix full turns clockwise.

• Hold the rope rotor steady.

• Pull out the rope with the startergrip and straighten it out.

- Hold the starter grip firmly tokeep the rope tensioned.

- Let go of the rope rotor andslowly release the starter grip sothat the rope winds itself onto therotor.

Note: The rewind spring iscorrectly tensioned when thestarter grip sits firmly in the ropeguide bush without drooping toone side. If this is not the case,tension the spring by oneadditional turn.

When the starter rope is fullyextended, it must still be possibleto rotate the rope rotor at leastanother half turn before maximumspring tension is reached. If this isnot the case, pull the rope out,hold the rope rotor steady andtake off one turn of the rope.

Do not overtension the rewindspring as this will cause it tobreak.

- Refit the fan housing - see 6.2.

Note: For descriptions ofprocedures for replacing thepawl or the rope guide bush,see ,,General Servicing,Troubleshooting“ handbook.

6.3.2 Tensioning 6.4 Starter Rope, Pawl,Rope Guide Bush

143R

A12

4V

A14

3RA

125

143R

A12

7

143R

A12

6

26 017, 018

Rubber anti-vibration buffers areinstalled between the enginehousing and handle frame.Damaged rubber buffers (annularbuffers) must always be replacedin sets.

- Remove the handle frame - see8.4.

Annular buffer in handle frame:

• Pry the annular buffer out of thehandle frame.

• Push the new annular buffer intothe handle frame until its groove(1) engages the inner rib (2).

Lower annular buffer in enginehousing

- Remove the fuel tank - see 10.7.

• Pry the plug out of the annularbuffer.

- Pry annular buffer out of enginehousing.

• Push the new annular buffer intohousing from outside until itsgroove (1) engages the inner rib(2).

Upper annular buffer in enginehousing


• Pry the plug out of the annularbuffer.

- Pry annular buffer out of enginehousing.

• Push the new annular buffer intohousing from outside until itsgroove (1) engages the inner rib(2).

7. AV HANDLE SYSTEM

143R

A13

2

143R

A12

8

143R

A13

0

143R

A12

9

1122

143R

A13

1

22 11

143R

A13

31122

017, 018 27

The thumb-operated MasterControl lever moves the switchshaft to select the requiredfunction.

The following positions can beselected with the Master Controllever:

STOP (1) (closes shortcircuit contactand interruptsignition)

RUN (2) (normal operatingposition)

START (3) (warm start -starting throttle/choke shutter open)

CHOKE (4) (cold start -starting throttle/choke shutter closed)

- Remove the filter housing - see10.2.

• Pull short circuit wire out ofconnector (1) on switch shaft.

• Pull contact sleeve of shortcircuit wire out of switch shaft.

• Set Master Control to“CHOKE” (4)

• Pull choke rod out of the switchshaft and choke shaft.

• Pry the switch shaft out of itspivot mount.

- Pull the switch shaft out of thebore (1).


Note: The contact spring must belifted slightly to install the switchshaft. Press switch shaft into itspivot mount.


• Pull ground wire off the contactspring.

• Pull the contact spring out of itsseat in the engine housing.


8. MASTER CONTROL/HANDLE SYSTEM8.1 Switch 8.2 Contact Spring

143R

A13

4

1234

143R

A13

6

143R

A10

8

143R

A13

7

1

143R

A13

5

1

143R

A13

8

143R

A11

4

28 017, 018


• Pry the handle molding off thehandle frame.

• Take the torsion spring out of itsseat in the interlock lever.

• Remove the throttle trigger fromthe pivot.

• Take the throttle trigger off thethrottle rod (1).

• Take the torsion spring off thethrottle trigger.

• Pull the interlock lever off thepivot.


Note: Engage pivots (1) in holes(2) and press handle moldinghome until it snaps into position.

8.3 Throttle Trigger/Interlock Lever

143R

A13

9

143R

A14

314

3RA

144

143R

A14

2

1

143R

A14

5

2

2 11

1

2

143R

A14

014

3RA

141

017, 018 29

- Remove the filter housing - see10.2.

• Disconnect throttle rod from thethrottle shaft.

• Pry the plugs out of the annularbuffers.

• Push the annular buffers out oftheir seats.

• Push the handle frame to oneside and lift it away.

• Remove the throttle trigger (1)and interlock lever (2) - see 8.3.

• Remove the annular buffer - see7.


Note: The pin (1) must engage thehole.

The groove (2) must engage theinner rib in the handle frame.

• Install annular buffer in handleframe.

- Fit plugs in the annular buffers.

- Fit the filter housing - see 10.2.

8.4 Handle Frame

143R

A05

3

143R

A05

4

1

2

143R

A04

9

143R

A14

6

2

1

143R

A05

1

143R

A14

7

143R

A05

0

143R

A05

5

30 017, 018

Impurities gradually clog the finepores of the filter with tiny particlesof dirt. This prevents the oil pumpfrom supplying sufficient oil to thebar and chain. In the event ofproblems with the oil supplysystem, first check the oil tankand the pickup body. Clean the oiltank if necessary.


Removing oil pump:


• Pry the suction hose out of itsseat.

• Fit lever (1) of installing tool inthe bore for the annular buffer -from inside.

- Swing the lever up and out of theway.

• Screw puller (1) into the oil pump.

- Swing lever down into puller.

• Push connecting pin throughhole marked ,,1130".

• Push lever upward to pull the oilpump out of the housing.

• Unscrew the oil pump (1) fromthe puller (2).

Installing the oil pump:

• Place the oil pump in positionso that the left edge (1) of thegroove lines up with the step (2).

• Insert installer (1) with straightstem in the oil pump.

9. CHAIN LUBRICATION9.1 Oil Pump

143R

A14

814

3RA

149

11

143R

A15

2

143R

A15

4

11

143R

A15

0

11

143R

A15

6

1122

143R

A15

1

143R

A15

3

1122

017, 018 31

- Swing lever down into installer.

- Push connecting pin throughhole marked ,,1130".

• Press lever down until the in-staller butts against the housing.The oil pump is thus installed atthe right depth in the housing.

- Remove the lever.

- Push the suction hose into itsseat.

- Fit the handle frame - see 8.4.

- Remove the clutch - see 3.3.

• Pull the worm with drive springoff the crankshaft stub.

• Take the drive spring off theworm.



• Pry the suction hose out of itsseat.

• Remove the oil and fuel tankfiller caps together with the capretainers.

• Take out the fan housing mount-ing screws.

- Remove the fan housing.

9.2 Worm 9.3 Oil Tank

143R

A03

4

143R

A15

714

3RA

158

143R

A14

814

3RA

163

143R

A15

9

32 017, 018

• Remove the flywheel - see 5.3.

• Pull out the oil tank.


Note: When reinstalling, pass thesuction hose through the hole.

- Remove the oil tank - see 9.3.

• Pry flange of oil suction hose outof oil tank.

• Pull suction hose with pickupbody out of oil tank.

• Pull the pickup body off thesuction hose.

- Wash the pickup body in whitespirit and, if possible, blow it outwith compressed air.

Note: Replace the pickup body if itis damaged.

- Flush out the oil tank.

- Fit the suction hose, pickup bodyfirst, in the tank.

- Press the hose flange intoposition.

Note: Coat the hose flange witha little oil to simplify installation.

• Line up the suction hose so thatits end (1) points to the centerof the curved section (2).

- Install the oil tank - see 9.3.

9.4 Suction Hose/Pickup Body

143R

A16

7

11

22

143R

A16

1

143R

A16

5

143R

A16

2

143R

A16

6

143R

A16

0

143R

A16

4

017, 018 33

Dirty and clogged air filters reduceengine power, increase fuelconsumption and make startingmore difficult.

The air filter should always becleaned when engine powerbegins to drop off.


- Clean away any loose dirt fromaround the filter.

• Remove the filter element.

- Wash the filter element in afresh, non-flammable cleaningsolution (e.g. warm soapy water)and, if possible, blow out withcompressed air. Soften en-crusted dirt by soaking theparts in cleaning solution.

Note: If filter is damaged, installnew part immediately.



• Unscrew the mounting nuts.

• Pull away the filter housing.

- Inspect the filter element - see10.1.


Note: Tighten mounting nuts to3.5 Nm (2.6 lbf.ft).

Troubleshooting chart - see,,General Servicing, Troubleshoot-ing“ handbook.

The carburetor can be tested forleaks with the carburetor andcrankcase tester.


• Pull fuel hose off carburetorelbow connector.

• Push the fuel line (1) onto thenipple (2).

10. FUEL SYSTEM 10.2 Filter Housing 10.3 Carburetor10.1 Air Filter 10.3.1 Leakage Testing

143R

A16

914

3RA

170

143R

A17

2

2 1

VA

143R

A17

1

143R

A16

8

34 017, 018

• Use fuel line (1) with nipple (2)as adapter to make connectionbetween tester and carburetorelbow connector.

• Push the nipple into the tester’spressure hose (4).

• Close the vent screw (5) on therubber bulb (6) and pump air intothe carburetor until the pressuregauge shows a reading ofapprox. 0.4 bar (5.8 psi).

If this pressure remains constant,the carburetor is airtight. However,if it drops, there are two possiblecauses:

1. The inlet needle is not sealing(foreign matter in valve seat orsealing cone of inlet needle isdamaged or inlet control leversticking).

2. The metering diaphragm isdamaged.

In either case the carburetor mustbe removed and serviced - see,,Carburetor“ handbook.

- After completing test, open thevent screw and pull the fuel lineoff the elbow connector.

- Push the fuel hose onto thecarburetor elbow connector.


- Remove the switch shaft - see8.1.

• Pull the fuel hose off carburetorelbow connector.

• Disconnect the throttle rod fromthe throttle shaft.

• Pull the carburetor off the mount-ing studs.


Note: Before installing carburetor,check that sleeve is in position inmanifold.

10.3.2 Removing and Installing

143R

A17

3

33

36

35

44

11

22

143R

A17

514

3RA

176

143R

A17

4

143R

A04

3

017, 018 35

The carburetor is equipped with afixed jet in place of the high speedadjusting screw (H screw).

Maximum engine speed is perma-nently set and cannot be adjusted.Only the engine idle speed can beadjusted within fine limits.

The carburetor guarantees anoptimum fuel-air mixture in alloperating conditions.

Standard setting

If the carburetor has to beadjusted from scratch, first carryout the standard setting.

Carefully screw down the lowspeed adjusting screw (L) until it ishard against its seat. Then open itone full turn counterclockwise.

- Check chain tension.

- Check air filter and cleanif necessary.

- Start the saw -warm up the engine.

- Adjust idle speed correctly(chain must not rotate).

Adjusting idle speedIt is usually necessary to changethe setting of the idle speed screw(LA) after every correction to thelow speed adjusting screw (L).

Note: Turn screws very slowly andcarefully - even slight adjustmentsproduce a noticeable change inengine running behavior.

Engine stops while idling –Check standard setting.

Turn idle speed stop screw (LA)clockwise until the chain begins torun - then turn it back one quarterturn.

Chain runs while engine isidling – Check standard setting.

Turn the idle speed stop screw(LA) counterclockwise until thechain stops running - and thenturn it about another half turn inthe same direction.

Erratic idling behavior, pooracceleration -even though low speed adjust-ing screw is one turn openIdle setting too lean.Turn the low speed adjustingscrew (L) counterclockwise untilthe engine runs and acceleratessmoothly.

The diaphragm pump draws fuelout of the tank and into the carb-uretor via the fuel hose. Anyimpurities mixed with the fuel areretained by the pickup body (filter).The fine pores of the filter event-ually become clogged with minuteparticles of dirt. This restricts thepassage of fuel and results in fuelstarvation.

Important: In the event of troublewith the fuel supply system,always check the fuel tank andthe pickup body first. Clean thefuel tank if necessary.

Cleaning the fuel tank

• Unscrew the filler cap and drainthe tank.

- Pour a small amount of cleangasoline into the tank.

- Close the tank and shake thesaw vigorously.

- Open the tank again and drain it.

Note: Dispose of old fuel atapproved disposal site.

10.4 Carburetor Adjustment 10.5 Pickup Body

143R

A17

7

11

22

143R

A17

8

36 017, 018

Pickup body

• Use the assembly hook (1) topull the pickup body out of thefuel tank.

Note: Do not stretch the fuel hosewhile removing it.

• Pull the pickup body off the fuelhose.

- Fit a new pickup body.


Correct operation of the carburetoris only possible if atmosphericpressure and internal fuel tankpressure are equal at all times.This is ensured by the tank vent.

Important: In the event of troublewith the carburetor or the fuelsupply system, always check andclean the tank vent.

Equalization of pressure from theoutside inwards takes place viathe valve.

Note: Valve opening must beclean.

Equalization of pressure from theinside outwards takes placepassed the sides of the valve.


- Drain the fuel tank.

• Pull fuel hose off carburetorelbow connector.

• Pull the fuel tank out of theengine housing.

• Remove the fuel hose (1) andvalve (2).


10.6 Tank Vent 10.7 Fuel Tank

143R

A18

0

143R

A18

6

143R

A18

3

11

22

143R

A18

1

143R

A18

5

143R

A18

2

143R

A17

9

11

017, 018 37

Note: When pushing the fuel tankinto position, route the fuel hosebetween the straps on the enginehousing (see illustration).

- Remove the fuel tank - see 10.7.

• Use assembly hook (1) to pullthe pickup body out of the tank.

• Pull the pickup body off the fuelhose.

• Pry the grommet out of the tankand pull out the fuel hose.

• Pull the grommet off the fuelhose.


Note: Coat the grommet with alittle oil to simplify installation.

10.8 Fuel Hose

143R

A18

4

143R

A18

7

11

143R

A18

8

143R

A05

6

143R

A18

9

38 017, 018

No. Part Name Part No. Application Rem.

1 Locking strip for piston 0000 893 5903 Blocking the crankshaft2 Sealing plate 0000 855 8106 Sealing exhaust port for

leakage test3 - Flange 1123 855 42004 - Bushing 1123 851 83005 Test flange 1118 850 4200 Leakage test6 Carburetor and 1106 850 2905 Testing engine housing and

crankcase tester carburetor for leaks7 Vacuum pump 0000 850 3501 Testing engine housing for leaks8 - Nipple 0000 855 92009 - Fuel line 1110 141 8600

10 Puller 0000 890 4400 Removing oil seals11 - Jaws (No. 3.1) 0000 893 370612 Press sleeve 1123 893 2400 Installing oil seals13 Guide sleeve 1123 894 7700 Protecting oil seal at

starter side14 Clamp 1120 893 9100 Holding big end bearing15 Assembly drift 1114 893 4700 Fitting piston pin16 Installing rool 8 5910 890 2208 Fitting hookless snap rings

in piston17 Assembly tool 1117 890 0900 Fitting brake spring18 Stud puller M8 5910 893 0501 Removing bar mounting studs19 Setting gauge 1111 890 6400 Setting air gap bettween ignition

module and flywheel20 Assembly tool 1116 893 4800 Installing rewind spring21 Assembly tool 1123 890 2200 Removing oil pump22 - Puller 1130 893 140023 - Installer 1130 893 150024 Assembly hook 5910 893 8800 Removing pickup body

(fuel)25 Assembly stand 5910 850 3100 Holding saw for repairs26 Clamping rail 5910 890 2000 For mounting saw to assembly stand27 Torque wrench 5910 890 0301 Screw assemblies (0.5 to 18 Nm) 1)

5910 890 030228 Torque wrench 5910 890 0311 Screw assemblies (6 to 80 Nm) 1)

5910 890 0312 2)29 Screwdriver QI-T27x150 5910 890 2400 For all IS screws 3)30 Crimping tool 5910 890 8210 Attaching connectors to

electrical wires31 Puller 1116 893 0800 Removing flywheel32 Socket, 13 mm 5910 893 5608 Flywheel nut33 Socket, 19 mm 5910 893 5612 Clutch34 Socket T 27x125 0812 542 2104 IS screws

Remarks:

1) Always use torque wrench to tighten DG screws.2) Wrench has optical/acoustic signal.3) On DG screws, use for releasing only.

11. SPECIAL SERVICING TOOLS AND AIDS11.1 Special Servicing Tools

017, 018 39

No. Part Name Part No. Application

1 Lubricating grease 0781 120 1111 Oil seals, oil pump drive,chain sprocket bearing, chain tensioner,switch shaft/contact spring

2 Standard commercial, Cleaning crankshaft stubsolvent-based degreasantwithout chlorinated orhalogenated hydricarbons

3 STIHL special lubricant 0781 417 1315 Bearing bore in rope rotor,rewind spring in starter cover

4 Electrician’s repair kit 5910 007 1050

5 Graphite grease Peg on starter pawl

6 Molykote grease Sliding and pivot points of chain brake

7 Dirko sealant 0783 830 2120 Engine pan, oil seals (outside diameter)(100 g/3.5 oz)

8 Securing screws 0786 111 1101 Engine housing mounting screws(Loctite 242)

9 Screw set 5910 007 1060

11.2 Servicing Aids

40 017, 018

MS180

Documents

technical

pressure remains

annular buffer

stihl special

short circuit

rope guide

heat ball

fuel supply