MS171 MS181 MS211 Service Manual

STIH)

STIHL MS 171, 181, 211 2007-05

MS 1

RA

_533

_00_

01_0

1

1. Introduction 3

2.

3.

3.13.23.33.43.5

4.

4.14.2

4.34.44.54.64.7

5.

5.1

6.

6.1

7.

7.17.2

7.37.47.57.67.7

8. Engine 28 11. Servicing the AV System 60

AV Spring on Oil Tank 60AV Spring on Fuel Tank 60

Contents71, MS 181, MS 211

Safety Precautions 4

Specifications 5

Engine 5Fuel System 5Ignition System 5Chain Lubrication 5Tightening Torques 6

Troubleshooting 8

Clutch 8Chain Drive, Chain Brake, Chain Tensioner 9Chain Lubrication 10Rewind Starter 11Ignition System 12Carburetor 14Engine 17

Cutting Attachment 18

Chain Catcher 18

Clutch 19

Clutch Drum 21

Chain Brake 22

Checking Operation 22Removing and Installing the Brake Band 22Brake Lever 24Flat Spring 26Pins 26Chain Tensioner 27Bar Mounting Studs 27

8.1

8.28.2.18.2.28.2.38.38.4

8.5

8.68.7

8.88.8.1

9.

9.19.1.1

9.29.3

9.49.59.69.6.19.6.2

9.6.39.6.49.7

10.

10.110.2

10.310.410.510.610.7

10.8q AND

Muffler / Spark Arresting Screen 28Leakage Test 29Preparations 29Vacuum Test 30Pressure Test 30Oil Seals 31Removing and Installing the Shroud 32Removing and Installing the Engine 33Crankshaft 34Ball Bearings/Crankshaft 36Piston 37Piston Rings 39

Ignition System 40

Ignition Module 40Removing and Installing 40Ignition Timing 42Testing the Ignition Module 42Spark Plug Boot 43Flywheel 44Short Circuit Wire 45Testing 45Removing and Installing 45Ground Wire 47Contact Spring 47Ignition System Troubleshooting 49

Rewind Starter 52

General 52Removing and Installing 52Pawl 53ErgoStart 53Rope Rotor 55Starter Rope / Grip 55Tensioning the Rewind Spring 57Replacing the Rewind Spring 58

11.111.2

11.3

11.4

12.

12.112.1.1

12.2

13.

13.113.213.3

13.413.51

REAS STIHL AG & Co. KG, 2007

AV Spring on Cylinder 61Handle Frame 62

Master Control Lever 64

Switch Shaft 64Removing and Installing 64Throttle Trigger / Interlock Lever 66

Chain Lubrication 68

Pickup Body 68Oil Suction Hose 68Removing and Installing the Oil Pump 69Valve 70Oil Tank Cap 71

2Contents

14. Fuel System 72

14.114.214.3

14.314.4

14.414.414.414.414.414.414.4

14.4

14.414.5

14.514.514.6

14.7

14.7

14.814.814.8

14.814.914.914.914.9

14.9

15.

16.Air Filter 72Baffle / Filter Base 72Removing and Installing the Carburetor 73

.1 Leakage Test 74Servicing the Carburetor 74

.1 Metering Diaphragm 74

.2 Inlet Needle 76

.3 Fixed Jet 76

.4 Valve Jet 77

.5 Pump Diaphragm 77

.6 Air Valve 79

.7 Choke Shaft / Choke Shutter 80

.8 Throttle Shaft / Throttle Shutter 82

.9 Adjusting Screws 85Adjusting the Carburetor 86

.1 Basic Setting 86

.2 Standard Setting 87Choke and Throttle Rods 87Removing and Installing the Intake Manifold 89

.1 Removing and Installing the Carburetor Carrier 90Tank Vent 92

.1 Testing 92

.2 Removing and Installing 93

.3 Manual Fuel Pump 93Fuel Intake 94

.1 Pickup Body 94

.2 Fuel Intake Hoses 95

.3 Fuel Hoses, Tank Vent /Manual Fuel Pump 96

.4 Fuel Tank Cap 97

Special Servicing Tools 98

Servicing Aids 100MS 171, MS 181, MS 211

MS 1

1. Introduction

This service manual contains detailed descriptions of all the typicproc

You illustout rinstacom

Referelevnum

A fausevefault"TrouServasse

RefebullewhicpublTechsuppupda

The special tools mentioned in the descriptions are listed in chapter 171, MS 181, MS 211

al repair and servicing edures for this power tool.

should make use of the rated parts lists while carrying epair work. They show the lled positions of the individual ponents and assemblies.

r to the latest edition of the ant parts list to check the part bers of any replacement parts.

lt on the machine may have ral causes. To help locate the , consult the chapter on bleshooting" and the "STIHL

ice Training System" for all mblies.

r to the Technical Information tins for engineering changes h have been introduced since ication of this service manual. nical information bulletins also lement the parts list until an ted edition is issued.

"SpecmanuidentiSpecithe spavaila

SymbpicturThe m

In the

: = As(

= An(

IIn the

A

a

b 4.2

Servicinformexcluequipnot beial Servicing Tools" of this al. Use the part numbers to fy the tools in the "STIHL al Tools" manual which lists all ecial servicing tools currently ble from STIHL.

ols are included in the text and es for greater clarity. eanings are as follows:

descriptions:

ction to be taken as hown in the illustration above the text)

ction to be taken that is ot shown in the illustration above the text)

illustrations:

Pointer

Direction of movement

= Reference to anotherchapter, i.e. chapter 4.2 in this example

e manuals and technical ation bulletins are intended

sively for the use of properly ped repair shops. They must passed to third parties.

Servicconsiis mo5910the m1650 screw

The sthey, may dmach

The anecesstandmoun

33

ing and repairs are made derably easier if the machine unted to assembly stand (3) 890 3100. To do this, secure ounting plate (2) 5910 850 to the assembly stand with two s (1) and washers.

crews must not project since depending on the machine, amage housings when the

ine is clamped in position.

bove operation is not sary with the new assembly 5910 890 3101 since the ting plate is already fitted.

2

219R

A000

TG

4Afterand covepowethroumounut (

The the mhead

AlwareplaTheySTIHthe SSTIHThissma

Storfuels

Collecleanpropenvir

2. Safety Precautions disengaging the chain brake removing the chain sprocket r, bar and chain, the rheads bar stud is pushed gh the outer hole in the

nting plate and secured with the arrow).

machine is held in position on ounting plate by the two screw s on the engine housing.

ys use original STIHL cement parts. can be identified by theL part number,TIH) logo and the

L parts symbol ( symbol may appear alone on ll parts.

ing and disposing of oils and

ct fuel or lubricating oil in a container and dispose of it

erly in accordance with local onmental regulations.

533R

A000

TG

If the courswork,specias thewarni

Gasofuel acondi

Alwayglovecompassem

Improburns

Do noother All wooutdowiped

Alwayworkienginengine is started up in the e of repairs or maintenance observe all local and country-fic safety regulations as well safety precautions and

ngs in the instruction manual.

line is an extremely flammable nd can be explosive in certain tions.

s wear suitable protective s for operations in which onents are heated for bly or disassembly.

per handling may result in or other serious injuries.

t bring any fire, flame, spark or source of heat near the fuel. rk with fuel must be performed ors only. Spilled fuel must be away immediately.

s perform leakage test after ng on the fuel system and the e.MS 171, MS 181, MS 211

MS 1

3. Specifications

3.1 Engine

DispBorStroEng

MaxwithIdleCluCluCraat gund

3.2

3.3

3.4571, MS 181, MS 211

MS 171 MS 181, MS 181 C MS 211, MS 211 C

lacement: 30.1 cm3 31.8 cm3 35.2 cm3

e: 37 mm 38 mm 40 mmke: 28 mm 28 mm 28 mmine power to ISO 7293: 1.3 kW (1.8 PS)

at 9,500 rpm1.5 kW (2.0 PS) at 9,500 rpm

1.7 kW (2.3 PS) at 9,500 rpm

. permissible engine speed bar and chain: 13,500 rpm 13,500 rpm 13,500 rpm speed: 2,800 rpm 2,800 rpm 2,800 rpmtch: Centrifugal clutch without liningstch engages at: 5,100 rpm 5,100 rpm 5,100 rpmnkcase leakage test auge pressure: 0.5 barer vacuum: 0.5 bar

Fuel System Carburetor leakage test at gauge pressure:

0.8 bar

Operation of tank vent at gauge pressure: 0.5 barFuel: as specified in instruction manual

Ignition System Air gap between ignition module and fanwheel:

0.15...0.35 mm

Spark plug (suppressed): NGK CMR 6HElectrode gap: 0.5 mm

Chain Lubrication Fully automatic, speed-controlled oil pump with reciprocating piston

Oil delivery rate: 7.0 cm/min at 10,000 rpm

63.5 Tightening Torques

DG and P (Plastoform) screws are used in polymer and light metal components. These screws form a permanent thread when they are installed for the first time. They can be removed and installed as often as necobsFor

Fas

ScrScrScrCol

Col

Scr

Scr

Cou

ScrScr

ScrScrScr

Scr

Scr

ScrScr

Scr

ScrCol

ScrNut

ScrMS 171, MS 181, MS 211

essary without impairing the strength of the screwed assembly, providing the specified tightening torque is erved. this reason it is essential to use a torque wrench.

tener Thread size For component Torque RemarksNm

ew P 4x12 Cover plate, chain sprocket cover 2.5ew B 3.9x13 Cover plate (special accessory) 1.0ew D 4x15 Chain tensioner cover/engine housing 2.5lar screw D 8x18 Collar screw, engine housing/guide bar,

rear 16.0 1)

lar screw D 8x18 Collar screw engine housing/guide bar, front

16.0 1)

ew P 4x16 Cover, chain brake/engine housing (repair solution)

2.0

ew D 5x16 Cover, chain brake/engine housing (repair solution)

2.0

ntersunk screw M 6x14 Replacement chain catcher (repair solution)

4.0

ew P 5x20 Filter base/engine housing 4.0ew P 5x20 Filter base/engine housing/carburetor

carrier4.0

ew D 5x16 Spiked bumper/engine housing 3.5ew D 4x12 Manifold/cylinder 4.0ew P 5x20 AV bearing plug, front bottom/engine

housing4.0

ew P 5x20 AV bearing plug, rear bottom/handle frame

4.0

ew P 5x20 AV bearing plug, rear bottom/engine housing

4.0

ew D 5x18 AV bearing plug/cylinder 8.0ew P 5x25 Fan housing/hand guard/engine

housing4.0

ew P 5x20 Fan housing/engine housing 4.0M 12x1 L Clutch/crankshaft 50.0

ew D 5.3x41 Crankcase/engine pan/cylinder 11.0lar nut M 5 Baffle/filter base/collar screw,

carburetor3.5

ew D 5x18 Muffler/cylinder 8.0M 8x1 Flywheel/crankshaft 28.0 2)M 10x1 Spark plug 12.0

ew D 4x18 Ignition module/cylinder 4.0

MS 1

Remarks:

1) L2) D

Use

PlacTigh

Thisand

PowDo

Do 771, MS 181, MS 211

octite 243 medium strengthegrease crankshaft/flywheel faces and mount oil-free

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

e the screw in the hole and rotate it counterclockwise until it drops down slightly.ten the screw clockwise to the specified torque.

procedure ensures that the screw engages properly in the existing thread and does not form a new thread weaken the assembly.

er screwdriver setting for polymer: DG and P screws max. 500 rpmnot use a impact wrench for releasing or tightening screws.

not mix up screws with and without binding head

84. Troubleshooting

4.1 Clutch

Con

Sawthro

Saw

LouMS 171, MS 181, MS 211

dition Cause Remedy

chain stops under load at full ttle

Clutch shoes badly worn Install new clutch

Clutch drum badly worn Install new clutch drum

chain rotates at idle speed Engine idle speed too high Readjust with idle speed screw (LA) (counterclockwise)

Clutch springs stretched or fatigued Replace the clutch springs or install new clutch

Clutch spring hooks broken Replace the clutch springs

Clutch shoe bores worn Replace clutch shoes or install new clutch

d noises Clutch springs stretched or fatigued Replace all clutch springs

Needle cage damaged Fit new needle cage

Clutch shoe retainer broken Fit new retainer

Clutch shoes and carrier worn Install new clutch

MS 1

4.2 Chain Drive, Chain Brake, Chain Tensioner

Con

Cha

Sawthro

Sawimmacti971, MS 181, MS 211

dition Cause Remedy

in sprocket wears rapidly Chain not properly tensioned Tension chain as specified

Wrong chain pitch Fit chain of correct pitch

Insufficient chain lubrication Check chain lubrication

Chain sprocket worn Fit new chain sprocket

chain stops under load at full ttle

Clutch shoes badly worn Install new clutch

Clutch drum badly worn Install new clutch drum

Brake band blocked Check freedom of movement and operation of brake band

chain does not stop ediately when brake is

vated

Brake spring stretched or broken Fit new brake spring

Brake band stretched or worn Fit new brake band

Clutch drum worn Fit new clutch drum

10

4.3 Chain Lubrication

In the event of trouble with the chain lubrication system, check and rectibefo

.

Con

Cha

Mac

Oil MS 171, MS 181, MS 211

fy other sources of faults re disassembling the oil pump.

dition Cause Remedy

in receives no oil Oil tank empty Fill up with oil, check oil pump

Oil inlet hole in guide bar is blocked

Clean oil inlet hole

Intake hose or pickup body clogged or intake hose ruptured

Fit new intake hose and pickup body

Valve in oil tank blocked Clean or replace valve

Teeth on worm worn Install new worm

Oil pump damaged or worn Install new oil pump

Oil intake hose not properly fitted or damaged

Fit oil intake hose properly or install new hose

hine losing chain oil Oil pump body (engine housing) damaged

Check engine housing and oil pump and replace if necessary

Oil pump damaged or worn Install new oil pump

Oil intake hose connector damaged Install new oil intake hose



pump delivers insufficient oil Oil pump worn Install new oil pump



Unsuitable chain lubricant has been used

Drain unsuitable chain lubricant from oil tank and fill up with recommended chain lubricant

MS 1

4.4 Rewind Starter

Con

Sta

Sta

Stafar e

Staalm(cra

Ver

Staand1171, MS 181, MS 211

dition Cause Remedy

rter rope broken Rope pulled out too vigorously as far as stop or over edge, i.e. not vertically

Fit new starter rope

Normal wear Fit new starter rope

rter rope does not rewind Very dirty or corroded Clean or replace rewind spring

Insufficient spring tension Check rewind spring and increase tension

Rewind spring worn Fit new rewind spring

rter rope cannot be pulled out nough

Spring overtensioned Check rewind spring and reduce tension

rter rope can be pulled out ost without resistance nkshaft does not turn)

Guide peg on pawl or pawl itself is worn

Fit new pawl

Spring clip on pawl fatigued Fit new spring clip

sions with ErgoStart Spring worn or fatigued Fit new ErgoStart spring housing

Carriers or pawls on flywheel faulty Install new ErgoStart carriers or pawls

rter rope is difficult to pull rewinds very slowly

Starter mechanism is very dirty Thoroughly clean complete starter mechanism

Lubricating oil on rewind spring becomes viscous at very low outside temperatures (spring windings stick together)

Coat rewind spring with a little standard solvent-based degreasant (containing no chlorinated or halogenated hydrocarbons), then pull rope carefully several times until normal action is restored

12

4.5 Ignition System

Exercise extreme caution while carrying out maintenance and repaThe caus

Con

Engtem

A pMS 171, MS 181, MS 211

ir work on the ignition system. high voltages which occur can e serious or fatal accidents!.

dition Cause Remedy

ine runs roughly, misfires, porary loss of power

Spark plug boot is loose Press boot firmly onto spark plug and fit new spring if necessary

Spark plug sooted, smeared with oil

Clean the spark plug or replace if necessary

Fuel/oil mixture too much oil

Use correct mixture of fuel and oil

Incorrect air gap between ignition module and flywheel

Set air gap correctly

Flywheel cracked or has other damage or pole shoes have turned blue

Install new flywheel

Ignition timing wrong, flywheel out of adjustment, key in flywheel has sheared off


Weak magnetization in flywheel pole shoes have turned blue


Irregular spark Check operation of switch shaft/contact springs and ignition module.Faulty insulation or break in ignition lead or short circuit wire. Check ignition lead/ignition module and replace ignition module if necessary.Check operation of spark plug, clean spark plug and replace if necessary.

roblem with the carburetor or the engine can also be the reason for erratic running behavior.

MS 1

Condition Cause Remedy

No 1371, MS 181, MS 211

spark Spark plug faulty Install new spark plug

Faulty insulation or short in short circuit wire

Check short circuit wire for short circuit to ground

Break in ignition lead or insulation damaged

Check ignition lead, replace ignition module if necessary

Ignition module faulty Install new ignition module

14

4.6 Carburetor


Careng

PooMS 171, MS 181, MS 211

buretor floods; ine stalls

Inlet needle not sealing. Foreign matter between valve seat and cone or cone worn

Remove and clean or replace the inlet needle, clean the carburetor, replace inlet needle if necessary

Inlet control lever sticking on spindle

Clean inlet control lever, replace if necessary

Helical spring not located on nipple of inlet control lever

Remove the inlet control lever and refit it correctly

Perforated disc on diaphragm is deformed and presses constantly against the inlet control lever

Fit a new metering diaphragm

r acceleration Setting of low speed screw too lean Check basic carburetor setting, correct if necessary

High speed screw too rich Check basic carburetor setting, correct if necessary

Inlet needle sticking to valve seat Remove inlet needle, clean and refit

Diaphragm gasket leaking Fit new diaphragm gasket

Metering diaphragm damaged or shrunk

Fit new metering diaphragm

Manifold damaged Install new manifold

MS 1


Engidle

Eng1571, MS 181, MS 211

ine will not idle, speed too high

Throttle shutter opened too wide by idle speed screw (LA)

Reset idle speed screw (LA) correctly

Oil seals/engine leaking Seal or replace oil seals/engine

Air valve contaminated does not close

Clean air valve, replace if necessary

Air valve stiff Check air valve, replace if necessary

Throttle rod stiff throttle shutter does not close

Replace throttle rod and lever

ine stalls at idle speed Idle jet bores or ports blocked Clean the carburetor

Idle jet too rich or too lean Set low speed screw (L) correctly

Setting of idle speed (LA) incorrect throttle shutter completely closed

Set idle speed screw (LA) correctly

16


Engload

Engpowspe

Engand

ErraMS 171, MS 181, MS 211

ine speed drops quickly under low power

Air filter dirty Clean the air filter

Throttle shutter not opened fully Check throttle rod

Tank vent faulty Replace tank vent

Fuel pickup body dirty Install new pickup body

Fuel strainer dirty Clean fuel strainer in carburetor, replace if necessary

Leak in fuel line between tank and fuel pump

Install new fuel line

Setting of high speed screw (H) too rich

Check basic carburetor setting, correct if necessary

Main jet bores or ports blocked Clean the carburetor

Pump diaphragm damaged or fatigued

Fit new pump diaphragm

ine running extremely rich, no er and very low maximum ed

Air valve does not open Check lever on air valve and replace if necessary

ine running too rich, low power low maximum speed

Air valve does not open fully in full throttle position

Check lever on air valve and replace if necessary

tic idle too lean Air valve does not close properly Check lever on air valve and replace if necessary

MS 1

4.7 Engine

Always check and, if necessary, repair the following parts before looki

- Air - Fue- Ca- Ign

Con

Engat idat fu

Engor r

Eng1771, MS 181, MS 211

ng for faults on the engine:

filterl system

rburetorition system

dition Cause Remedy

ine does not start easily, stalls le speed, but operates normally ll throttle

Oil seals in engine damaged Replace the oil seals

Engine leaking or damaged (cracks)

Seal or replace the engine

ine does not deliver full power uns erratically

Piston rings worn or broken Fit new piston rings

Muffler / spark arresting screen carbonized

Clean the muffler (inlet and exhaust), replace spark arresting screen, replace muffler if necessary

Air filter element dirty Replace air filter element

Fuel hose severely kinked or damaged

Fit new hose or position it free from kinks

Tank vent faulty Check tank vent and replace if necessary

Air valve does not open Check air valve and replace if necessary

ine overheating Insufficient cylinder cooling. Air inlets in fan housing blocked or cooling fins on cylinder very dirty

Thoroughly clean all cooling air openings and the cylinder fins

18

5. Cutting Attachment

Weafrom

: Un

: Reco

: Re

In

Mactens

Weafrom

: Oun

: Re(2gu

In

3

2

When installing the adjusting wheel, check that its teeth face the cover r gloves to protect your hands injury.

screw the hex nut (1).

move the chain sprocket ver (2).

move the bar (3) and chain.

stall in the reverse sequence.

hines with quick chain ioner

r gloves to protect your hands injury.

pen up the wing nut (1) and screw it counterclockwise.

move the chain sprocket cover ) and tensioning gear (3) with ide bar (4).


2

153

3RA0

01 T

G

4

1

533R

A002

TG

3

: Apwin

Chnec

Op

: Pufirsprepos

: Re

Readj

1

1

2ply screwdriver to side (1) of g nut and pry it out of its seat.

eck the wing nut and replace if essary.

en up the wing nut.

sh the wing nut (1), thin side t (arrow), into the opening and ss it home until it snaps into ition.

move the screw (arrow).

move the cover plate (1) and usting wheel (2).

165R

A006

TG

165R

A007

TG

1

533R

A005

TG

plate.

Reseq

5.1A repfitted the ch

Recov

Filecatcov

: Pocat

Puthrhouthe

Tigscraganee

Rerev

Tig

3MS 171, MS 181, MS 211

assemble in the reverse uence.

Chain Catcherlacement chain catcher can be if the integral chain catcher on ain sprocket cover is worn.

move the chain sprocket er, bar and chain, b 5

down the damaged chain cher on the chain sprocket er.

sition the replacement chain cher (1) in the guides (arrows).

sh the countersunk screw (2) ough the bore in the engine sing and fit the locknut (3) at other side.

hten down the countersunk ew firmly the locknut butts inst the engine housing and d not be held.

assemble all other parts in the erse sequence.

htening torques, b 3.5

533R

A006

TG

1 2

MS 1

6. Clutch

Troubleshooting, b 4.1

Reco

Re

Re

Thmththb

: Pu

: Un

1 171, MS 181, MS 211

move the chain sprocket ver, bar and chain, b 5

move the clutch drum, b 6.1

move the shroud, b 8.4

e spring may be preloaded on achines with ErgoStart. It is erefore necessary to remove e fan housing, b 10.1 and

10.2

ll off the spark plug boot (1).

screw the spark plug (1).

533R

A007

TG

1

533R

A008

TG

1

: Pu000plucyl

: Un

Note thread

Disas

Cla

: Usrem

1

1sh the locking strip (1) 0 893 5904 into the spark

g hole until it butts against the inder wall (arrow) as shown.

screw the clutch (1).

that the clutch has a left-hand .

sembling

mp the clutch in a vise.

e hook (2) 5910 890 2800 to ove the clutch springs (1).

533R

A009

TG

TOP

533R

A010

TG

2

533R

A011

TG

Pucar

: Pusho

Cle

Re

: Slipclu

119

ll the clutch shoes off the rier.

ll the retainers (1) off the clutch es.

an all parts, b 16

place any damaged parts.

the retainers (1) onto the tch shoes.

533R

A012

TG

533R

A013

TG

533R

A014

TG

20

: Fiar

: Cl(a

Attacthe r

: Atto

: Ustospthov

12

1t the clutch shoes (1) over the ms (2).

amp the clutch in a vise rrow).

h the springs to the side with aised hexagon (arrow).

tach one end of each spring (1) the clutch shoes.

e the hook (2) 5910 890 2800 attach the other ends of the rings and press them firmly into e clutch shoes do not erstretch the springs.

533R

A015

TG

533R

A016

TG

2

533R

A017

TG

: Ch(aratta

Copos

It is c(arrow

: Pocrahex

1eck the clutch all springs rows) must be properly ched.

ver washer (1) must be in ition.

orrectly fitted when TOP ) faces outwards.

sition the clutch on the nkshaft stub so that the raised agon (arrow) faces outwards.

533R

A018

TG

TOP

533R

A019

TG

TOP

533R

A020

TG

: Usscrcraposthefirm

Tig

Recyl

Rerev

1MS 171, MS 181, MS 211

e the hexagon (arrow) to ew the clutch (1) onto the nkshaft stub. Check the ition of the locking strip and n tighten down the clutch ly left-hand thread.


move the locking strip from the inder.


TOP

533R

A021

TG

MS 1

6.1 Clutch Drum

Ore

Reco

: Puth

Rem(1), s

1

1 171, MS 181, MS 211

n machines with ErgoStart, lieve spring tension, b 10.4


ll the hand guard (1) towards e front handle.

R

ove and install the clutch drum ee instruction manual.

533R

A022

TG

TOP

1

533R

A023

TG

: Pu

Clecra

Lubcra

Inssig

If therthe indrum thickn80% oa newll off the needle cage (1).

an the needle cage and nkshaft stub, b 16

ricate the needle cage and nkshaft stub, b 16

pect the clutch drum (1) for ns of wear.

e are signs of serious wear on side diameter of the clutch (1), check the remaining wall ess. If it is less than about f the original thickness, install clutch drum.

TOP

533R

A024

TG

VA14

8RA1

01

80%

100%

1

!

The nmust

Use t

Apoutthe

Rerev21

otch (arrow) in the clutch drum engage the worms spring (1).

he mark (2) for alignment.

ply thin coating of oil to the side of the clutch drum and brake band.


TOP

2

533R

A025

TG

22

7. Chain Brake

7.1 Checking Operation

The impochainin tei.e. tactivchainstan

Contfine smothe bimpaThisforcebrakbrakeffec

St

W(lofosero

Wopacchst

The deceimpe

If thepropb 4

7.2 Removing and Installing the Brake Bandchain brake is one of the most rtant safety devices on the saw. Its efficiency is measured

rms of the chain braking time, he time that elapses between ating the brake and the saw coming to a complete

dstill.

amination (with chain oil, chips, particles of abrasion, etc.) and othing of the friction surfaces of rake band and clutch drum ir the coefficient of friction. , in turn, reduces the frictional s and thus prolongs the ing time. A fatigued or stretched e spring has the same negative t.

art the engine

ith the chain brake activated cked), open the throttle wide r a brief period (max. 3 conds) the chain must not tate.

ith the chain brake released, en the throttle wide and tivate the brake manually the ain must come to an abrupt op.

braking time is in order if leration of the saw chain is rceptible to the eye.

chain brake does not operate erly, refer to troubleshooting, .2.

Tro

Recov

: Dispultowbra

Re

Putheten

To redactivachain

: Uscovsho

Re(1)nec

1ubleshooting, b 4.2


engage the chain brake by ling the hand guard (1) ards the front handle the ke band is loose.

move the clutch drum, b 6.1

sh the hand guard (1) towards guide bar the brake band is sioned.

uce the risk of injury, do not te the chain brake while the brake cover is open.

e a screwdriver to ease the er (1) away at the points wn (arrows).

move and inspect the cover , service or replace if essary.

533R

A022

TG

TOP

1

533R

A356

TG

: Prysea

: Swout

Do no

: Tuonethe

1

1MS 171, MS 181, MS 211

the brake band (1) out of its t (arrow).

ing the brake band (1) wards.

t over-stretch the brake band.

rn the brake band (1) slightly to side and disconnect it from brake lever (arrow).

533R

A027

TG

1

533R

A028

TG

533R

A029

TG

MS 1

Instanoticareapartsrema0.6 m

: Atbranits

: Swgu

171, MS 181, MS 211

ll a new brake band if there are eable signs of wear (large s on inside diameter and/or of outside diameter) and its ining thickness is less than m.

tach the brake band (1) to the ake lever (arrow) from the side d then turn it in the direction of seat.

ing the brake band into the ide (arrow) first.

533R

A030

TG

533R

A031

TG

533R

A032

TG

: Pugui

: Pusea

Enholhom

1sh the brake band (1) into its des (arrows).

sh the brake band (1) into its t (arrow) as far as stop.

gage pegs on cover (1) in the es (arrows) and push it fully

e.

533R

A059

TG

533R

A027

TG

1

TOP

1

533R

A026

TG

If the cover

Drithea (b (

If ahouinw

Pla

Fit scr

Tig

Insb

Rerev

Ch

123

pegs have broken off, the can be serviced.

ll out the recesses exactly in center (arrow):1) = o 4.5 mm2) = o 5.5 mm

peg is stuck in the engine sing, remove it by pushing it ards.

ce the cover (1) in position.

D 5x16 screw (2) and P 4x16 ew (3) and tighten down firmly.


tall the clutch drum, 6.1


eck operation.

533R

A033

TG

2

TOP

533R

A034

TG

13 2

24

7.3 Brake Lever

Tr

Re

Puthsp

: Us11brpiou

Dith

: Ta

: Prho

Tore

2

1

2oubleshooting, b 4.2

move the brake band, b 7.2

sh the hand guard away from e front hand to relax the brake ring.

e the assembly tool (2) 17 890 0900 to disconnect the ake spring (1) from the anchor n (arrow) the spring may pop t during this operation.

sconnect the brake spring from e brake lever.

ke out the screw.

y the hand guard (1) off the fan using (arrow).

ease assembly, remove the wind starter, b 10.2

533R

A035

TG

153

3RA0

36 T

G

: Re

: Liftthethe

Rethe

: Pulev(ar

Rebramove the E-clip (arrow).

and turn the strap (1) a little, n push it to the left as far as hole (arrow) and remove it.

move the spacer sleeve from brake lever.

ll the hand guard (1) and brake er (2) off the pivot pins rows) together.

move the hand guard and ke lever.

533R

A037

TG

533R

A038

TG

1

533R

A039

TG

1

2

: Puhan

Insgua

Insif n

Insrep

Cleb

Pothespr

: Puhanthe

1MS 171, MS 181, MS 211

ll the brake lever (2) out of the d guard (1).

pect the brake lever and hand rd and replace if necessary.

pect the pivot pins and replace ecessary, b 7.5

pect the flat spring and lace if necessary., b 7.4

an all disassembled parts, 16

sition the brake lever so that hook (arrow) for the brake ing is at the top.

sh the brake lever (1) into the d guard recess and line up

holes.

533R

A040

TG

533R

A041

TG

1

MS 1

Lu

: Pulebu

: Liguanpi

: Eagu

Pulethsa

2

1

Locate the hand guard at the starter side and fit the screw. 171, MS 181, MS 211

bricate the pivot pins, b 16

sh the hand guard and brake ver over the machine until they tt against the pivot pins.

ft the bearing boss of the hand ard and the brake lever a little d position them on the pivot

ns (arrows).

se the cam (arrow) of the hand ard (2) past the flat spring (1).

sh the hand guard and brake ver onto the pivot pins, moving e hand guard to and fro at the me time.

533R

A042

TG

533R

A043

TG

533R

A044

TG

Pu

Fit

: Fit

: Thetighrelacas

If the anchob 7.sh on the spacer sleeve.

the strap (1).

the E-clip (2).

turns of brake spring must be tly against one another in the xed condition. If this is not the e, replace the brake spring.

groove in the brake spring r pin is worn, install a new pin,

5

533R

A045

TG

1 2

533R

A046

TG

: Attbra

: Us111bra(ar

Rerev

Tig

Lub

225

ach brake spring (1) to the ke lever (arrow).

e assembly tool (2) 7 890 0900 to attach the ke spring (1) to the anchor pin row).



ricate the brake lever, b 16

533R

A047

TG

533R

A048

TG

1

26

7.4 Flat Spring

The hold

Re

: Puit

: Pugu

Lu

Rere

Ti

7.5 Pins12flat spring and hand guard cam the hand guard in position.

move the brake lever, b 7.3

ll out the flat spring (1), check and replace if necessary.

sh the flat spring (1) into the ides (arrows).

bricate the flat spring, b 16

assemble all other parts in the verse sequence.

ghtening torques, b 3.5

533R

A049

TG

153

3RA0

50 T

G

1

The aWorn

All pathe pifor gr

Re

: Usthethesup

: Ustheclu

BecoaLoc

: Poboron exipin

3nchor pins secure the springs. pins must be replaced.

rts have been removed from ns in the following illustrations eater clarity.

move the engine, b 8.5

e a suitable punch to drive out pins (1+2) in the direction of engine use suitable port.

e a suitable punch to drive out pin (3) in the direction of the tch use suitable support.

fore installing the new pin (1), t its knurled shank with tite, b 16

sition the new pin (1) in the e (arrow) so that the knurling the pin meshes with the sting knurling in the bore. Turn back and forth as necessary.

533R

A051

TG

2 1

533R

A052

TG

1

: Drispe

View

: CasqudimPinPinPin

Rerev

Tig

Lubspr

3

3MS 171, MS 181, MS 211

ve home pins (1+2+3) to cified lengths.

from air filter side.

refully tap home the pins arely to obtain the following ensions: (1) a = 8.9 mm (2) b = 12.1 mm (3) c = 4.0 mm



ricate the brake lever and flat ing, b 16

533R

A053

TG

a

b

c 533RA0

54 T

G

12

MS 1

7.6 Chain Tensioner

For mtens

Reco

Tr

: Tuunagth

: Re

1 27.7 Bar Mounting Studs71, MS 181, MS 211

achines with quick chain ioner see b 5


oubleshooting, b 4.2

rn the spur gear (2) clockwise til the tensioner slide (1) butts ainst the right-hand end and e screw (arrow) is visible.

move the screw (arrow).

2

1

533R

A055

TG

533R

A056

TG

: Reten

: Insassandnec

Cleb

Lubwitb

Insmove the spur gear (1) and sioner slide (2).

pect the cover (1), spur gear embly (2), tensioner slide (3) thrust pad (4) and replace if essary.

an all disassembled parts, 16

ricate the chain tensioner h STIHL multipurpose grease, 16

tall in the reverse sequence.

533R

A057

TG

42

1 3

2

533R

A058

TG

Recov

: Pu(1)as

: Un

: Be(arLoc

Fit the

Tig

Rerev27


sh stud puller 5910 893 0501 over the collar stud (2) as far it will go. Unscrew the stud.

screw collar stud (3).

fore installing, coat threads rows) of collar studs with tite, b 16

the collar studs and tighten m down firmly.



23

1

533R

A003

TG

533R

A004

TG

28

8. Engine

8.1 Muffler / Spark Arresting Screen

Alwarepaair filooki

Tr

: Prm

: Ta

Reanys check and, if necessary, ir the fuel system, carburetor, lter and ignition system before ng for faults on the engine.

oubleshooting, b 4

y the plugs out of the muffler by eans of the tabs (arrows).

ke out the screws (arrows).

move the muffler (1), check d replace if necessary.

533R

A060

TG

533R

A061

TG

1

: Re

Spark

: Usspafitte

Cle(1)

Ins

: Insfac

Po

1

1move the heat shield (1).

arresting screen

e suitable pliers to pull out the rk arresting screen (1) (if d).

an the spark arresting screen and replace if necessary.

tall in the reverse sequence.

pect and clean the sealing es (arrows), b 16

sition machine vertically.

533R

A062

TG

533R

A063

TG

533R

A064

TG

: Plapos(arsea

Capos

: Fit coraga

Tig(ar

: Pu

Tig

1

1MS 171, MS 181, MS 211

ce the heat shield (1) in ition and use the recesses

rows) to line it up on the ling face of the exhaust port.

re place the muffler (1) in ition.

the screws (arrows) and check rect position of heat shield in.

hten down the screws rows) firmly.

sh home the plugs (arrows).


533R

A065

TG

533R

A066

TG

533R

A060

TG

MS 1

8.2 Leakage Test

Defecraccaussuppengimixtu

Thispresimpo

Morespeesmo

Alwafirst.

The thoro0000

8.2.1

Re

: Un

SeThin

: Fido

Ti

The sealing plate must completely fill the space between the two 71, MS 181, MS 211

ctive oil seals and gaskets or ks in castings are the usual es of leaks. Such faults allow lementary air to enter the ne and upset the fuel-air re.

makes adjustment of the cribed idle speed difficult, if not ssible.

over, the transition from idle d to part or full throttle is not oth.

ys perform the vacuum test

engine can be checked ughly for leaks with the pump 850 1300.

Preparations


screw the spark plug (1).

t the piston to top dead center. is can be checked through the

let port.

t spark plug (1) and tighten it wn firmly.


533R

A008

TG

1

: Prymu

Tak

Re

Fit

: Ins

: Fit 000cylandmo

1

1 the plugs (arrows) out of the ffler.

e out the screws.

move the muffler.

the flange (1) 1123 855 4200.

ert the screws (arrows).

the sealing plate (1) 0 855 8106 between the

inder exhaust port and flange tighten down the screws

derately.

533R

A060

TG

533R

A116

TG

533R

A067

TG

screw

Re

: Chpla

: Fit 250

: Fit the

1

129

s.

move the carburetor, b 14.3

eck that the sleeve (1) is in ce.

the test flange 1139 893 0 (1).

the nuts (arrows) and tighten m down firmly.

533R

A069

TG

533R

A070

TG

533R

A071

TG

30

8.2.2 Vacuum Test

Oil sto a awaypistothere

A tes0000fault

: Copuni

: Pu

: Opra

If the vacuum reading remains constant, or rises to no more than eals tend to fail when subjected vacuum, i.e. the sealing lip lifts from the crankshaft during the n's induction stroke because is no internal counterpressure.

t can be carried out with pump 850 1300 to detect this kind of

.

nnect suction hose (1) of mp 0000 850 1300 to

pple (arrow).

sh ring (1) to the left.

perate the lever (2) until the essure gauge (arrow) indicates vacuum of 0.5 bar.

533R

A072

TG

1

1

2

533R

A073

TG

0.3 baassumgood pressvacuumust

Aftring

Cob

8.2.3

Carryfor the

Alwbef

: Copum(arr within 20 seconds, it can be ed that the oil seals are in

condition. However, if the ure continues to rise (reduced m in the engine), the oil seals be replaced, b 8.3

er finishing the test, push the to the right to vent the pump.

ntinue with pressure test, 8.2.3

Pressure Test

out the same preparations as vacuum test, b 8.2.2

ays carry out the vacuum test ore the pressure test, b 8.2.2

nnect pressure hose (1) of p 0000 850 1300 to nipple

row).

533R

A072

TG

1

: Pu

: Opprea ppreleaairt

If thmupar

To finarea enginexists

Aftringdis

Re

Ins

Loothe

Tig

Rerev

TigMS 171, MS 181, MS 211

sh the ring (1) to the right.

erate the lever (2) until the ssure gauge (arrow) indicates ressure of 0.5 bar. If this ssure remains constant for at st 20 seconds, the engine is ight.

e pressure drops, the leak st be located and the faulty t replaced.

d the leak, coat the suspect with oil and pressurize the e. Bubbles will appear if a leak .

er finishing the test, push the to the left to vent the pump

connect the hose.

move the test flange.

tall the carburetor, b 14.3

sen the muffler and remove sealing plate.

hten down the muffler firmly.



1

2

533R

A075

TG

MS 1

8.3 Oil Seals

Use engiInstathe e

It is nthe coil se

Ignit

Rean

Re

Frtapu

: Apwi

2

1

1

Clamp the puller arms. Clutch side71, MS 181, MS 211

oil seal (1) 9638 003 1581 if the ne is not opened.ll oil seal (2) 9639 003 1585 if ngine has been opened up.

ot necessary to disassemble omplete engine to replace the als.

ion side

move the fan housing, b 10.1 d b 10.2

move the flywheel, b 9.5

ee off the oil seal in its seat by pping it with a suitable tube or a nch.

ply puller (1) 5910 890 4400 th No. 3.1 jaws 0000 893 3706.

217R

A085

TG

533R

A076

TG

Pu

Take crank

Cle

Lubsea

Apbthe

Slipfaccra

: Us112sea

The sfree fr

Warotatim

Deb

Rerev

1

2ll out the oil seal.

care not to damage the shaft stub.

aning the sealing face, b 16

ricate sealing lips of new oil l with grease, b 16

ply thin coating of sealant, 16, to the outside diameter of oil seal.

the oil seal, closed side ing the engine, over the nkshaft stub.

e press sleeve (2) 3 893 2400 to install the oil l (1).

eating face must be flat and om burrs.

it about one minute, then te the crankshaft several

es.

grease the crankshaft taper, 16


533R

A077

TG

Recov

Re

Re

: Re(1)

: Re

1

131


move the clutch, b 6

move the oil pump, b 13.3

move and inspect the worm , and replace if necessary.

move the retaining ring (1).

533R

A074

TG

533R

A078

TG

32

Frtapu

: Apwi

Cl

Pu

Takecran

Cl

Luse

: Fi11

Apbth

1

1

Slip the oil seal, closed side facing the engine, over the ee off the oil seal in its seat by pping it with a suitable tube or a nch.

ply puller (1) 5910 890 4400 th No. 3.1 jaws 0000 893 3706.

amp the puller arms.

ll out the oil seal.

care not to damage the kshaft stub.

eaning the sealing face, b 16

bricate sealing lips of new oil al with grease, b 16

t the installing sleeve (1) 18 893 4602.

ply thin coating of sealant, 16, to the outside diameter of

e oil seal.

533R

A079

TG

533R

A080

TG

ins

Re

: Us112sea

Warotatim

: Fit

Ins

Lubb

1

2

1talling sleeve.

move the installing sleeve (1).

e press sleeve (1) 3 893 2400 to install the oil l (2).

it about one minute, then te the crankshaft several

es.

the retaining ring (1).

tall the oil pump, b 13.3

ricate the worm with grease, 16

533R

A081

TG

533R

A082

TG

: Pucramu

Rerev

8.4

: Purea

: Liftit ohan

1MS 171, MS 181, MS 211

sh the worm (1) onto the nkshaft stub as far as stop it st engage the oil pump pinion.


Removing and Installing the Shroud

sh slide lock (1) in direction of r handle.

the shroud (1) a little and pull ff in the direction of the rear dle.

533R

A087

TG

533R

A083

TG

1

533R

A088

TG

1

MS 1

: Apspth

Re

Inre

: Pu(apo

: Pu(1th

1

2

1

1 271, MS 181, MS 211

ply screwdriver above the indle (arrow) and push it into e slide (1).

move the slide (1).

spect the slide and spindle and place if necessary.

sh the slide (1) into the guides rrows) until it snaps into sition in the spindle (2).

sh the bearing lugs of shroud ) into the guides (arrows) until ey snap into position.

533R

A084

TG

533R

A089

TG

1

533R

A086

TG

: Puas wit

8.5

The cremovpiston

Re Re

cov Re Re Re

b Re

b Re Re

b Re If n

carsh the shroud (1) down as far stop and secure in position h the slide lock (2).

Removing and Installing the Engine

omplete engine has to be ed before removing either the or cylinder.

move the shroud, b 8.4move the chain sprocket er, bar and chain, b 5

move the muffler, b 8.1move the clutch, b 6move the ignition module, 9.1move the wiring harness, 9.6.2move the flywheel, b 9.5move the handle frame, 11.4move the throttle rod, b 14.6ecessary, also remove the buretor carrier, b 14.7.1

533R

A085

TG

533R

A090

TG

: Re

: Rescrund e

: Takeng

After alwayapply

The cbe rebeen

1

133

move the worm (1).

move the cylinder mounting ews (arrows) from the erside of the engine housingngine pan is also loose.

e the engine (1) out of the ine housing.

loosening the engine pan, s clean the sealing faces and fresh sealant, b 16

arburetor carrier can be also moved after the engine has removed.

533R

A074

TG

533R

A091

TG

533R

A092

TG

34

Clcysene

Apfa

In

: Mpr (a

: Pacropho

Caen wiean the sealing faces on the linder, engine pan and oil als, remove gasket residue if cessary, b 16

ply fresh sealant to sealing ces, b 16

stall new oil seals, b 8.6

ake sure the oil seals are operly seated they must be installed flush rrow).

ss the clutch end of the ankshaft (1) through the ening (arrow) in the engine using.

refully place the engine in the gine housing

support engine pan from below th one hand.

533R

A093

TG

533R

A094

TG

1

Pohou thengup.

: Fit mo

Ins

Rerev

Tig

Ca

8.6

Re

: Prythe

Re

1sition the engine in the engine sing and hold it there e holes in the engine housing, ine pan and cylinder must line

and tighten down the cylinder unting screws (arrows).

tall the worm, b 8.3



rry out leakage test, b 8.2

Crankshaft


the engine pan (1) away from engine at the lugs (arrows).

move the engine pan.

533R

A091

TG

533R

A096

TG

: Liftbea

: Capis

Insbeanec

Insandb

: Re

: PucraMS 171, MS 181, MS 211

the crankshaft out of the ring seats (arrows).

refully pull the crankshaft and ton out of the cylinder.

pect the crankshaft and ball rings and replace if essary, b 8.7

pect piston and piston rings replace if necessary, b 8.8, 8.8.1

move the retaining ring (1).

ll the oil seals (arrows) off the nkshaft stub.

533R

A097

TG

1

533R

A098

TG

533R

A099

TG

MS 1

Insegab

The and Partsmus

Chre

If a nthe iserv71, MS 181, MS 211

spect the cylinder and clean the aling faces (arrows), remove sket residue if necessary, 16

sealing faces must be clean show no signs of damage. with damaged sealing faces

t be replaced.

eck the intake manifold (1) and place if necessary, b 14.7

ew cylinder is installed, transfer ntake manifold (if it is still iceable) from the old cylinder.

533R

A102

TG

1

533R

A101

TG

Use oenginInstalthe en

: Pu111cra

: Pufaccra

: Fit

2

1il seal (1) 9638 003 1581 if the e is not opened.l oil seal (2) 9639 003 1585 if gine has been opened up.

sh the installing sleeve (1) 8 893 4602 onto the nkshaft.

sh the new oil seals, open side ing the crankshaft, onto the nkshaft stubs.

the retaining ring (1).

217R

A085

TG

153

3RA1

07 T

G

1

533R

A098

TG

Luband

: Pothethe(arrisk

Aligbef

Viewelong cthe rig35

ricate the piston, piston rings cylinder wall with oil.

sition the piston rings so that radii at the ring gap meet at fixing pin in the piston groove rows) there is otherwise a of ring breakage.

n the piston and crankshaft ore installing in the cylinder.

d from the exhaust port, the rankshaft stub (1) must be on ht.

533R

A104

TG

533R

A105

TG

1

36

The by th

: Cacr(a

: Apthth

: Pobebemprho

Clean the crankshaft stub, b 16pistons rings are compressed e inner taper of the cylinder.

refully push the piston with ankshaft into the cylinder rrow).

ply thin coating of sealant to e outside diameter (arrows) of e oil seals, b 16

sition the crankshaft with arings and oil seals in the aring seats in the cylinder,

aking sure the oil seals are operly seated (arrows) in the using.

533R

A106

TG

533R

A108

TG

533R

A109

TG

Inson gasb

The mcleanway. Rmatin

: Apb

Sealarecesports

: Placyl

Applypan sdistrib

Take crankpect and clean the mating face the engine pan, remove ket residue if necessary, 16

ating faces must be perfectly and not be damaged in any

eplace parts with damaged g faces.

ply sealant along the groove, 16

nt must not get into the ses (arrows) the transfer must not be obstructed.

ce the engine pan (1) on the inder.

slight pressure to the engine o that the sealant is evenly uted .

care not to damage the shaft stubs.

533R

A110

TG

1

533R

A111

TG

Ins

Rerev

8.7

Re

Resea

Re

: Puign

: PucluMS 171, MS 181, MS 211

tall the engine, b 8.5


Ball Bearings/Crankshaft


move the crankshaft and oil ls, b 8.6

move the piston, b 8.8

ll the ball bearing (1) off the ition end of the crankshaft.

ll the ball bearing (1) off the tch end of the crankshaft.

1

533R

A113

TG

1

533R

A114

TG

MS 1

: Throanthre

Whecranbear

Clin

Use cran

: Apinbeas

2

1

1171, MS 181, MS 211

e crankshaft (1), connecting d (2) and needle bearing (3) are inseparable unit. This means e crankshaft must always be placed as a complete unit.

n fitting a replacement kshaft, always install new ball ings and oil seals.

ean the crankshaft before stalling, b 16

a firm support (2) to protect the kshaft.

ply a suitable sleeve (1) to the ner race to press home the ball aring at the clutch side as far stop.

3

533R

A115

TG

2

1

533R

A117

TG

Use acrank

: Apinnbeaas

Luboil.

Ins

Inssea

Ins

8.8

Re

Re

: Ushoogro(ar

2 firm support (2) to protect the shaft.

ply a suitable sleeve (1) to the er race to press home the ball ring at the ignition side as far

stop.

ricate the needle bearing with

tall the piston, b 8.8

tall the crankshaft and oil ls, b 8.6


Piston


move the crankshaft, b 8.6

e a suitable tool to ease the kless snap rings out of the oves in the piston bosses row).

533R

A119

TG

533R

A120

TG

: Poassaga

: Us111pin

If the by taphammduringno jolconne

: Recon

Insrep

137

sition the small diameter of embly drift (1) 1110 893 4700 inst the piston pin.

e the assembly drift (2) 0 893 4700 to push the piston (1) out of the piston.

piston pin is stuck, release it ping the end of the drift with a er. Hold the piston steady this process to ensure that

ts are transmitted to the cting rod..

move the piston (1) from the necting rod.

pect the piston rings and lace if necessary, b 8.8.1

533R

A121

TG

2

533R

A122

TG

1

533R

A123

TG

38

Lu

: Lith(alorig

Poco

: Pu11firenpi

: Fiasth

1bricate needle cage with oil.

ne up the piston as shown in e illustration so that the mark rrow) points to the rear and the ng crankshaft stub (1) is on the ht.

sition the piston on the nnecting rod.

sh the assembly drift (1) 10 893 4700, small diameter st, through the piston and small d (needle cage) and line up the

ston.

t the piston pin (2) on the sembly drift (1) and slide it into e piston.

533R

A124

TG

533R

A125

TG

1

533R

A126

TG

1 2

: Reins

: Attmagapsha

: Putheove

The inthe flamove the sleeve (1) from the talling tool 5910 890 2210.

ach the snap ring (1) to the gnet (2) so that the snap ring is on the flat side of the tool's nk (arrow).

sh the large slotted diameter of sleeve (1) 5910 893 1707 r the magnet and snap ring.

ner pin (2) must point towards t face (3) of tool's shank.

533R

A127

TG

1

533R

A128

TG

12

3

533R

A129

TG

2 1

: Predowtheof t

Use aboard

: Reont

Innerflat faMS 171, MS 181, MS 211

ss the installing tool nwards into the sleeve until

magnet butts against the end he guide slot.

suitable base (wooden ).

move the sleeve and slip it o the other end of the shank.

pin (arrow) must point toward ce.

533R

A130

TG

533R

A131

TG

MS 1

Insid

: Ap59tahotohoth

Fit th(arronear

Chbo

171, MS 181, MS 211

stall the snap rings at both es.

ply the installing tool 10 890 2210 with the sleeves

per against the piston boss, ld the piston steady, center the

ol shank exactly and press me until the snap ring slips into e groove.

e snap ring (1) so that its gap w) points up. It must not be the recess (2).

eck position and security of th snap rings.

533R

A132

TG

533R

A133

TG

2

Chrep

Chbeanec

Ins

Ins

8.8.1

Re

Repispis

: Usscreck the piston rings and lace if necessary., b 8.8.1

eck the oil seals and ball rings and replace if essary., b 8.7

tall the crankshaft, b 8.6


Piston Rings

move the piston, b 8.8

move the piston rings from the ton the MS 171 has only one ton ring.

e a piece of old piston ring to ape the grooves clean.

533R

A134

TG

533R

A135

TG

: Insgroupw

: Pothethe(ar

Chof t

Ins39

tall the new piston rings in the oves so that the radii face ard (arrows).

sition the piston rings so that radii at the ring gap meet at fixing pin in the piston groove rows).

eck correct installed position he piston rings (arrows).

tall the piston, b 8.8

533R

A136

TG

533R

A137

TG

40

9. Ignition System

Exercise extreme caution when troubleshooting and carrying out mainignitiwhiceven

Trousystespar

Rean

The systeigniti

9.1

The all thconttwo ecoil b

1

1

the high voltage output with ignition lead (1)tenance or repair work on the on system. The high voltages h occur can cause serious or fatal accidents.

bleshooting on the ignition m should always begin at the

k plug, b 4.5


electronic (breakerless) ignition m basically consists of an on module (2) and flywheel (1).

Ignition Module

ignition module accommodates e components required to rol ignition timing. There are lectrical connections on the ody:

533R

A138

TG

2

533R

A139

TG

2

thecirc

Testina spaA newinstalis obtwiringcondi

Ignitiobe ad

Sincein thecanno

9.1.1

Re

Reand

: Pu connector tag (2) for the short uit wire

g in the workshop is limited to rk test. ignition module must be

led, b 9.1, if no ignition spark ained (after checking that and stop switch are in good tion).

n timing is fixed and cannot justed during repair work.

there is no mechanical wear se systems, ignition timing t get out of adjustment.

Removing and Installing


move the fan housing, b 10.1 b 10.2


533R

A007

TG

1

: Puret

: Pu

: Tak

: Re

: Re

2

1MS 171, MS 181, MS 211

ll the ignition lead (1) out of the ainer (arrow).

ll off the short circuit wire (1).

e out the screws (arrows).

move the ground wire (2).

move the ignition module (1).

533R

A140

TG

1

533R

A141

TG

1

533R

A142

TG

MS 1

The lead

Chigig

: Reof

Chan

Chre

Tr

: Fi

1

2

171, MS 181, MS 211

ignition module (1) and ignition (2) are an assembly.

eck the ignition module (1) and nition lead and replace the nition module if necessary.

move the insulator (1) and pull f the retainer (2).

eck the retainer and insulator d replace if necessary.

eck the spark plug boot and place if necessary, b 9.4

oubleshooting, b 4.5

t the retainer (1).

533R

A143

TG

2

533R

A144

TG

1

533R

A145

TG

1

Fit sto

: Selug

: Poso the(ar d

: Fit is ainsdow

2

1

2the insulator (1) so that the p (2) is against the upper hole.

cure the insulator (1) with the s (arrows) on the bosses.

sition the ignition module (1) that the ignition lead (2) is on left and insert the screw row) with washer o not tighten down yet.

the wire terminal (1) so that it gainst the stop (arrow) and

ert the screw do not tighten n yet.

533R

A146

TG

1

533R

A147

TG

533R

A148

TG

1

: Fit retfac

Pu th

: Romathe41

the ground wire (2) in the ainer (1) ground wire must e the cylinder (arrow).

sh the ignition module (1) back e flywheel must turn freely.

tate the flywheel until the gnet poles (arrows) are next to ignition module.

533R

A118

TG

2

NS

533R

A149

TG

1

42

: Sl41arth

Prth

Hoanfir

Ti

Re

Ch sum

: Fire

Shorbe nretaicylin

1ide the setting gauge (1) 18 890 6400 between the ms of the ignition module and e flywheel magnet.

ess the ignition module against e setting gauge.

ld the ground wire terminal d tighten down the screws

mly.


move the setting gauge.

eck operation rotate the flywheel and make re it does not touch the ignition odule.

t the short circuit wire (1) in the tainer (arrow) and reconnect it.

t circuit and ground wires must ext to one another in the ner ground wire must face the der.

533R

A150

TG

153

3RA1

51 T

G

1

: Puretain t

Fit

Rerev

9.2

Ignitiobe ad

Sincein thecanno

9.3

To teseithertesterignitio5910

The igsparksh the ignition lead (1) into the iner (arrow) and pull it a little

he direction of the air filter.

the boot on the spark plug.


Ignition Timing

n timing is fixed and cannot justed during repair work.

there is no mechanical wear se systems, ignition timing t get out of adjustment..

Testing the Ignition Module

t the ignition module, use the ZAT 4 ignition system 5910 850 4503 or the ZAT 3 n system tester 850 4520.

nition test refers only to a test, not to ignition timing.

533R

A152

TG

Using5910

Benewand

Tig

: Coinptesthe

High

: Crarewthe

The eaccel

If a spsyste

If no s(2), cthe aib 9.

1MS 171, MS 181, MS 211

the ZAT 4 ignition tester 850 4503

fore starting the test, install a spark plug in the cylinder tighten it down firmly.


nnect spark plug boot to the ut terminal (1). Push the ters output terminal (3) onto spark plug

voltage risk of electric shock.

nk the engine quickly with the ind starter and check spark in testers window (2).

ngine may start and erate during the test.

ark is visible, the ignition m is in order.

park is visible in the window heck the ignition system with d of the troubleshooting chart, 7

VA21

2RA2

09

32

MS 1

Usin5910

Benean

Ti

Cote

: Atsp

: Ussp

Whilby thsafepartsawayhighconnterm

1

1

High voltage risk of electric shock.71, MS 181, MS 211

g ZAT 3 ignition tester 850 4520

fore starting the test, install a w spark plug in the cylinder d tighten it down firmly


nnect spark plug boot to the rminal (2).

tach ground terminal (1) to the ark plug.

e adjusting knob (3) to set ark gap to about 2 mm.

e using the ZAT 3, hold it only e handle (4) or position it in a place. Keep fingers or other of your body at least 1 cm from the spark window (3),

voltage connection (2), ground ection (5) and the ground inal (1).

533R

A375

TG

2 3

376R

A135

TG

3 4

5

2

Crarewthe

The eaccel

If a spsyste

If no s(3), chthe aichart,

9.4

The iglead alead iignitio

Re

Pu

: Usspr

Unign

Punk the engine quickly with the ind starter and check spark in testers window (3).

ngine may start and erate during the test.

ark is visible, the ignition m is in order.

park is visible in the window eck the ignition system with

d of the troubleshooting b 9.7

Spark Plug Boot

nition module and ignition re an assembly. If the ignition

s damaged, install a new n module.


ll the boot off the spark plug.

e suitable pliers to pull the leg ing out of the spark plug boot.

hook the leg spring from the ition lead.

ll the boot off the ignition lead.

533R

A153

TG

Usceninsof t

: Pininto

Cowit

: Hosprinto43

e a pointed tool to pierce the ter of the ignition leads

ulation, 95.6 mm from the end he lead.

ch the hook of the leg spring the center of the lead (arrow).

at inside of spark plug boot h Press Fluid, b 16

ld the ignition lead and leg ing together and push them the spark plug boot.

95,6 mm

533R

A186

TG

376R

A136

TG

533R

A154

TG

44

: Mlopl

Do nsilico

Rere

9.5

Re

Blst

Inspect flywheel (1) and magnet poles (2) for cracks or other ake sure the leg spring (arrow) cates properly inside the spark ug boot.

ot use either graphite grease or ne insulating paste.


Flywheel


ock the piston with the locking rip (1), b 6

533R

A155

TG

533R

A156

TG

1

: Un

If the puller

: Scr111as qua

Taptim

Unthe

1screw the flywheel nut (arrow).

flywheel is stuck, use the .

ew on the puller (1) 6 893 0800 clockwise as far stop and then turn it back a rter turn.

the end of the puller a few es to release the flywheel.

screw the puller and remove flywheel.

533R

A157

TG

533R

A158

TG

533R

A159

TG

damaturne

The fstub mb 16

Onchenec

: Maengstu

Chmonec

Rerev

TigMS 171, MS 181, MS 211

ge. If it is damaged or has d blue, install a new flywheel.

lywheel bore and crankshaft ust be free from grease,

.

machines with ErgoStart, ck the pawls and replace if essary, b 10.4

ke sure the key (arrow) ages the slot in the crankshaft

b.

eck air gap between ignition dule and flywheel and adjust if essary, b 9.1.1



533R

A160

TG

MS 1

9.6 Short Circuit Wire9.6.1 Testing

If thesparthe s

Re

Rean

: Di

Co(a

Se0

The aboureasto be

Se

The infinicircu

If noignititroub

Ch

In

9.6.2 Removing and Installing : Disconnect short circuit wire (1).71, MS 181, MS 211

spark plug, ignition lead and k plug boot are in order, check hort circuit wire.



sconnect short circuit wire (1).

nnect the ohmmeter to ground rrow) and the short circuit (1).

t the Master Control lever to .

resistance measured must be t 0 . If it is much higher, the

on is a break and the wire has replaced, b 9.6.2

t the Master Control lever #.

resistance measured must be tely high. If not, fit a new short it wire, b 9.6.2

fault can be found, check the on system with the aid of the leshooting chart, b 9.7

eck ground wire for continuity.


533R

A161

TG

1

The sare codamaharne

Whencare n

Re

Reand

Re

: Pu

: Pureta

: Takthe

1hort circuit and ground wires mbined in a wiring harness. If ged, the complete wiring ss must be replaced.

cleaning the machine, take ot to disconnect wires.


move the fan housing, b 10.1 b 10.2

move the carburetor, b 14.3


ll the ignition lead out of the iner (arrow).

e out the screw and remove ground wire (2).

533R

A162

TG

533R

A163

TG

1

2

Puwir

: Refromo

Reb

Puwir

: Discirc(2)

Re

245

ll the short circuit and ground es out of the retainer (arrow).

move the wiring harness (1) m the guide (arrow) do not ve the cable tie.

move the carburetor carrier, 14.7.1

ll the short circuit and ground es out of the guides (arrows).

connect connectors of short uit wire (1) and ground wire

.

move the wiring harness.

533R

A164

TG

1

533R

A165

TG

1

46

: Chanwi

A fauprevwire.groucont

Insta

The withoclarit

: Pucir(a

The guidthe ctie o

1

2

1

1eck the short circuit wire (1) d ground wire (2) and replace ring harness if necessary.

lty ground wire can impair or ent operation of the short circuit For this reason also check the nd wire for contact and inuity.

lling

following steps are shown ut the manifold for greater y.

sh the wiring harness, short cuit wire (1) first, into the guide rrow).

cable tie (2) must rest on the e and point in the direction of ylinder do not move the cable n the wiring harness.

533R

A166

TG

533R

A167

TG

2

: Fit thewirgui

: Puprocon

: Pu(1)(ar

1the wiring harness (1) along housing and push it, ground e first, completely into the de (arrow).

sh ground wire connector with tective tube (2) onto the tact spring (1).

sh short circuit wire connector into receptacle on switch shaft row) as far as stop.

533R

A168

TG

1

533R

A169

TG

1

2

533R

A170

TG

: Pre(1)(ar

The whousiother.

The sloopewith t

: Poaga todisMS 171, MS 181, MS 211

ss the wires into the guides first, then into the guides rows).

ires must be against the ng and must not cross each

hort circuit wire must be d (arrow) so that it can move he switch shaft.

sition the ground wire (1) inst the protective rib (arrow) avoid unintentional

connection.

533R

A171

TG

1

533R

A172

TG

533R

A173

TG

1

MS 1

: Ch cosp

Inb

: Atfir en

Fiwith

In

Chan

Rere

Ti

9.6.3 Ground Wire171, MS 181, MS 211

eck operation the short circuit wires nnector must touch the contact ring (arrow) in position 0.

stall the carburetor carrier, 14.7.1

tach the wires, short circuit wire st, to the guide (arrow) the protective tube (1) must gage the guide.

t the ground and short circuit res in the retainer and connect em up, b 9.1.1

stall the ignition lead, b 9.1

eck air gap on ignition module d adjust if necessary, b 9.1.1



533R

A174

TG

533R

A175

TG

1

A fauprevewire. conta

The sare codamaharne

Chandnec

Rehar

9.6.4

Re

: Dislty ground wire can impair or nt operation of the short circuit Always check ground wire for ct and continuity.

hort circuit and ground wires mbined in a wiring harness. If ged, the complete wiring ss must be replaced.

eck for contact and continuity replace wiring harness if essary, b 9.6.1

move and install wiring ness, b 9.6.2

Contact Spring

move the switch shaft, b 12.1

connect the ground wire (1).

533R

A176

TG

1

: Eathe

Chif n

: Puthethe

: Puits into47

se the contact spring (1) over lug (arrow) and pull it out.

eck contact spring and replace ecessary.

sh the contact spring (1) into guide so that it lines up with recess (arrows).

sh the contact spring (1) into seat until the lug (arrow) snaps position.

533R

A177

TG

533R

A178

TG

1

533R

A179

TG

1

48

In

: Puprco

: Poag distall the switch shaft, b 12.1

sh ground wire connector with otective tube (2) onto the ntact spring (1).

sition the ground wire (1) ainst the protective rib (arrow) to avoid unintentional sconnection

533R

A169

TG

1

253

3RA1

73 T

G

1

: Ch thconspr

Thewirhouthe

Rerev

Tigeck operation e short circuit wires nector must touch the contact ing (arrow) in position 0.

ground and short circuit es must be laid close to the sing and properly seated in guides, b 9.6.2



3RA1

74 T

GMS 171, MS 181, MS 211

MS 1

9.7 Ignition System Troubleshooting4971, MS 181, MS 211

Engine does not run

Switch shaft: in position #?

Check the spark plug: Smeared with oil, black?

Sooted? Electrode gap correct?

Contacts shorted? Clean or replace the plug,

b 9.3

Check spark plug boot: Firmly seated on plug (leg spring)?

Leg spring hook in center of ignition lead? Boot damaged?

If necessary, install new spark plug boot and/or leg spring,

b 9.4

Test ignition system:with ZAT 3 or ZAT 4

(use ZAT 3 as main spark gap see TI 32.94),

b 9.3

1

50

1MS 171, MS 181, MS 211

Check flywheel: Have pole shoes turned blue?

Install new flywheel if necessary,b 9.5

Air gap: Check ignition module/flywheel,

reset if necessary, b 9.1.1

Check ignition lead: Severe chafing?

Spark plug boot: Holes/cracks? Resistance: spark plug boot to ground:

spec. 1.5 12 k If necessary, install new spark plug bootand/or ignition lead with ignition module,

b 9.4

Check ground and short circuit wires:

Wire damaged? Connectors firmly seated?

Check continuity, replace wiring harness if necessary, b 9.6.1

3

yes

no

Powerful spark?

2

MS 1

2 35171, MS 181, MS 211

Machine runs trouble-free,no further action necessary

no

Install new ignition module,

b 9.1.1

yes

no

Look for fault in fuel system or carburetor

Check engine for leaks Check position of flywheel on

crankshaft,b 8.2, b 9.5

yes

Check operation of switch shaft:

Short circuit wire chafed? Does contact spring make contact with short circuit wire in position #?

If necessary, install new wiring harness,

b 9.6.2

Powerful spark?

Engine runs

52

10. Rewind Starter

10.1 General

If thebecorewincomthe sbut poutsoil onand stickdetrithe s

In sua fewbasechlorhydr

Careseveuntil resto

BeforewinSTIH

If cloentirthe rand care

Cl

Mac

Reb

10.2 Removing and Installing Check the fan housing and segment and replace if action of the starter rope mes very stiff and the rope ds very slowly or not

pletely, it can be assumed that tarter mechanism is in order lugged with dirt. At very low

ide temperatures the lubricating the rewind spring may thicken

cause the spring windings to together. This has a mental effect on the function of tarter mechanism.

ch a case it is sufficient to apply drops of a standard solvent-d degreasant (containing no inated or halogenated ocarbons) to the rewind spring.

fully pull out the starter rope ral times and allow it to rewind its normal smooth action is red.

re installing, lubricate the d spring and starter post with L special lubricant.

gged with dirt or pitch, the e starter mechanism, including ewind spring, must be removed disassembled. Take particular when removing the spring.

ean all components, b 16

hines with ErgoStart

lieve tension of spring, 10.4

Re

: Turand

Usguarem

: Puoneseg

1

2move the shroud, b 8.4

n the starter grip sideways take out the screws (arrows).

e a screwdriver to pry the hand rd (1) off the boss (arrow) and ove the fan housing (2).

sh the locking tab (arrow) to side and take out the ment (1).

533R

A180

TG

533R

A181

TG

533R

A182

TG

1

nec

: Fit (arpussna

: Fit (aris swa

Tig

1MS 171, MS 181, MS 211

essary.

the segment (1) in the slots rows) in the fan housing, then h it into the locking tab until it ps into position.

and tighten down the screws rows) firmly the hand guard ecured with the screw (1) and sher.


3RA1

83 T

G

1

533R

A184

TG

MS 1

10.3 Pawl

Rean

: Gclipoou

Recle

Lugr

Fipe

Chec

: Poitspain

3

: Push the straight part of the spring clip over the starter post 71, MS 181, MS 211


rip the straight end of the spring p (1) and ease it off the starter st the rewind spring may pop t during this operation.

move and inspect the pawl (2), an or replace if necessary.

bricate seat of new pawl with ease, b 16

t the new pawl and lubricate its g with resin-free oil, b 16

k that washer (3) is in place.

sition the spring clip (1) so that loop engages the peg on the wl and its curved part (arrow) is

the starter posts groove.

533R

A185

TG

12

533R

A188

TG

1

unt

Rerev

Mach

Re

: Griclipandstamaope

Re(2)

Lubgre

Fit theb

Check

1

2il it snaps into the groove.


ines with ErgoStart

move the ErgoStart, b 10.4

p the straight part of the spring (1), ease it out of the groove pull the spring clip off the

rter post the rewind spring y pop out during this ration.

move and inspect the pawls , clean or replace if necessary.

ricate seat of new pawls with ase, b 16

the new pawls and lubricate ir pegs with resin-free oil, 16

that washer (3) is in place.

533R

A189

TG

2

3

: Poits pawis i

: Pusprunt

Rerev

10.4

The stensiospring

Puengreli

Renecand

153

sition the spring clip (1) so that loops engage the pegs on the

ls and its curved part (arrow) n the starter posts groove.

sh the straight part of the ing clip over the starter post il it snaps into the groove.


ErgoStart

pring may still be under n. Always relieve tension of as follows before installing:

ll out the starter rope until the ine turns tension is now

eved.

move the fan housing and, if essary, the segment, b 10.1 b 10.2

533R

A189

TG

54

: Re

: Re

: Pu

: Pu

Re

: Re

Puth

Cl

1

1

2 3 4 3 2move the circlip (1) do not overstretch.

move the washer (2).

ll off the carrier (3).

ll off the spring housing (1).

move the washer.

move the E-clips (arrows).

ll off the pawls (1) and remove e torsion springs.

ean the pawls (1), b 16

533R

A194

TG

3 2 153

3RA1

95 T

G53

3RA1

96 T

G

1

Inscarsprnec

: Fit n

: Pupinlocspr

Ins

1

1

1pect the spring housing (1), rier (2), pawls (3) and torsion ings (4) and replace if essary.

torsion springs in the pawls (1) ote installed position (arrows).

sh the pawls (1) onto the pivot s (2) on the flywheel and ate the ends of the torsion ings against the ribs (arrow).

tall the E-clips.

533R

A197

TG

1 3 4

533R

A198

TG

533R

A199

TG

2

: Fit

: Puthepawpawhou

: Puspr(ar(2)

: Fit

: Ins d

Rerev

1

1MS 171, MS 181, MS 211

the washer (1).

sh the spring housing (2) over starter post and onto the ls in the rope rotor (3) the ls must engage the spring sing.

sh the carrier (1) into the ing housing so that the recess row) engages the spring loop .

the washer (3).

tall the circlip (4) o not overstretch.


533R

A201

TG

533R

A202

TG

2

3 4

MS 1

10.5 Rope Rotor

Reliesprin

Renean

Mac

Re

All m

: Pu5st

Wstro

Pugrro

Rereb

The tensrewin

Repa

1

2 Install the starter rope, b 10.671, MS 181, MS 211

ving tension of rewind g

move the fan housing and, if cessary, the segment, b 10.1 d b 10.2

hines with ErgoStart


achines

ll out the starter rope (1) about cm and hold the rope rotor (2) eady.

hile still holding the rope rotor eady, take three full turns off the pe rotor.

ll out the rope with the starter ip and slowly release the rope tor.

move the starter rope or maining rope from the rotor,

10.6

system will not be under ion if either the starter rope or d spring is broken.

move the spring clip and wl(s), b 10.3

533R

A204

TG

2

Re

Rewin

: Ca(2)out

Chif n

CoSTb

Lubb

: Fit pos(ar

Fit

Insb

1move the washer (1).

d spring must be relaxed.

refully remove the rope rotor the rewind spring may pop and uncoil.

eck the rope rotor and replace ecessary.

at bore in rope rotor with IHL special lubricant, 16

ricate starter post with oil, 16

the rope rotor (2) on the starter t so that the inner spring loop

row) engages the recess (1).

the washer.

tall the pawl(s) and spring clip, 10.3

533R

A205

TG

533R

A206

TG

2

1

Tenb

Lubpaw

10.6

Renecand

Mach

Re

All m

Reb

The stensiorewin

Rerop

Do no

Re

: Pu(1)

Purop

155

sion the rewind spring, 10.7

ricate the peg(s) on the l(s) with grease, b 16

Starter Rope / Grip

move the fan housing and, if essary, the segment, b 10.1 b 10.2

ines with ErgoStart


achines

lieve tension of rewind spring, 10.5

ystem will not be under n if either the starter rope or d spring is broken.

move remaining rope from the e rotor and starter grip.

t shorten the starter rope.

move the rope rotor, b 10.5

sh the end of the starter rope out a little and undo the knot.

ll the starter rope out of the e rotor and fan housing.

533R

A207

TG

56

Standard Starter Grip

Pugr

: Tish

Thth

: Pugrre

Elastostart Starter Gripll the old rope out of the starter ip.

e one of the special knots own in the end of the new rope.

read the starter rope through e top of the starter grip.

ll the starter rope through the ip until the knot is seated in the cess (arrow).

VA98

2RA0

3653

3RA1

90 T

G

: Us(1)

: Puand

Puslepar

Do noe a suitable tool to pry the cap out of the starter grip.

ll the sleeve, washers, spring rope (arrow) out of the grip.

ll any remaining rope out of the eve. Inspect the individual ts and replace if necessary.

t shorten the starter rope.

165R

A230

TG

1

165R

A231

TG

Ththr

Tieend

Fit

: Pusprsta

Makeremaits be

Poenggrip

Pre

: Ththr(ar

1

1MS 171, MS 181, MS 211

read the new starter rope ough the sleeve.

a simple overhand knot in the of the rope.

the washers and spring.

ll the starter rope with sleeve, ing and washers into the rter grip (1).

sure the washers and spring in on the sleeve while the rope ing pulled into the grip.

sition cap so that its lug ages the slot in the starter .

ss the cap into the starter grip.

read the starter rope (1) ough the guide bushing row).

165R

A233

TG

533R

A208

TG

MS 1

: Thth(a

Seov

: Puin

Inthb

Innean

1 10.7 Tensioning the Rewind Spring71, MS 181, MS 211

read the starter rope (1) rough the side of the rope rotor rrow).

cure the rope with a simple erhand knot.

ll rope back until knot locates recess (arrow) in rope rotor.

stall the rope rotor and tension e rewind spring, b 10.5,

MS171 MS181 MS211 Service Manual

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Transcript of MS171 MS181 MS211 Service Manual