STIHL MM 55 User manual

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STIHL MM 55

Instruction Manual

Notice d’emploi

G Instruction Manual

1 - 24

F Notice d’emploi

25 - 53

Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-469-8221-C. VA1.F17.

0000000538_009_GB

MM 55, MM 55 C

English

1

{

with electronic systems.

Contents

Dear Customer,

Thank you for choosing a quality

engineered STIHL product.

It has been built using modern

production techniques and

comprehensive quality assurance.

Every effort has been made to ensure

your satisfaction and troublefree use of

the product.

Please contact your dealer or our sales

company if you have any queries

concerning this product.

Your

Dr. Nikolas Stihl

MultiSystem 2

Guide to Using this Manual 2

Safety Precautions and Working

Techniques 2

Approved MultiTools 7

Adjusting the bicycle handle 8

Fuel 8

Fueling 9

Starting / Stopping the Engine 9

Extra weight 12

Wheels 13

Operating Instructions 14

Replacing the Air Filter 14

Engine Management 15

Adjusting the Carburetor 15

Spark Plug 16

Engine Running Behavior 17

Storing the Machine 18

Inspections and Maintenance by

Dealer 18

Maintenance and Care 19

Main Parts 20

Specifications 21

Maintenance and Repairs 22

Disposal 22

STIHL Limited Emission Control

Warranty Statement 23

MM 55, MM 55 C

English

2

In the STIHL MultiSystem, various

MultiEngines and MultiTools are

combined to form a machine. In this

Instruction Manual, the functional unit of

MultiEngine and MultiTool is referred to

as a machine.

Accordingly, the instruction manuals for

the MultiEngine and the MultiTool

constitute the entire Instruction Manual

for the machine.

Always read both manuals carefully

before using your machine for the first

time and keep them safe for future

reference.

Pictograms

All the pictograms attached to the

machine are shown and explained in this

manual.

Symbols in text

WARNING

Warning where there is a risk of an

accident or personal injury or serious

damage to property.

NOTICE

Caution where there is a risk of

damaging the machine or its individual

components.

Engineering improvements

STIHL's philosophy is to continually

improve all of its products. For this

reason we may modify the design,

engineering and appearance of our

products periodically.

Therefore, some changes, modifications

and improvements may not be covered

in this manual.

Observe all applicable local safety

regulations, standards and ordinances.

If you have not used this type of power

tool before: Have your dealer or other

experienced user show you how to

operate your machine or attend a

special course in its operation.

Minors should never be allowed to use a

power tool.

Keep bystanders, especially children,

and animals away from the work area.

When the power tool is not in use, shut it

off so that it does not endanger others.

Secure it against unauthorized use.

The user is responsible for avoiding

injury to third parties or damage to their

property.

MultiSystem

469BA028 KN

+

Guide to Using this Manual Safety Precautions and

Working Techniques

Special safety precau-

tions must be observed

when working with a

power tool.

Always read and and

make sure you under-

stand both instruction

manuals (MultiEngine

and MultiTool) before

using your power tool for

the first time and keep

them in a safe place for

future reference. Non-

observance of the safety

precautions may result in

serious or even fatal

injury.

MM 55, MM 55 C

English

3

Lend or rent your power tool only to

persons who are familiar with this model

and its operation – do not lend of rent

your power tool without the MultiEngine

and MultiTool instruction manuals.

The use of noise emitting power tools

may be restricted to certain times by

national or local regulations.

To operate the power tool you must be

rested, in good physical condition and

mental health.

If you have any condition that might be

aggravated by strenuous work, check

with your doctor before operating a

power tool.

Persons with pacemakers only: The

ignition system of your power tool

produces an electromagnetic field of a

very low intensity. This field may

interfere with some pacemakers. STIHL

recommends that persons with

pacemakers consult their physician and

the pacemaker manufacturer to reduce

any health risk.

Do not operate the power tool if you are

under the influence of any substance

(drugs, alcohol) which might impair

vision, dexterity or judgment.

Use your power tool only for the

applications described in the instruction

manual of the MultiTool you are using.

Do not use your power tool for any other

purpose because of the increased risk of

accidents.

Do not operate the MultiEngine without a

properly mounted MultiTool since this

may result in damage to the machine.

Only use MultiTools and accessories

that are explicitly approved for this

power tool by STIHL or are technically

identical. It is important that you read the

chapter on "Approved MultiTools". If you

have any questions in this respect,

consult a servicing dealer. Use only high

quality tools and accessories in order to

avoid the risk of accidents and damage

to the machine.

STIHL recommends the use of genuine

STIHL tools and accessories. They are

specifically designed to match the

product and meet your performance

requirements.

Never attempt to modify your power tool

in any way since this may increase the

risk of personal injury. STIHL excludes

all liability for personal injury and

damage to property caused while using

unauthorized attachments.

Do not use a pressure washer to clean

the unit. The solid jet of water may

damage parts of the unit.

Clothing and Equipment

Wear proper protective clothing and

equipment.

Avoid clothing that could get caught on

branches or brush or moving parts of the

machine. Do not wear a scarf, necktie or

jewelry. Tie up and confine long hair

(e.g. with a hair net, cap, hard hat, etc.).

WARNING

Wear a face shield and make sure it is a

good fit. A face shield alone does not

provide adequate eye protection.

Wear hearing protection, e.g. earplugs

or ear muffs.

See also notes on "During Operation" in

the instruction manual of the MultiTool

you are using.

Vibrations

Prolonged use of the power tool may

result in vibration-induced circulation

problems in the hands (whitefinger

disease).

No general recommendation can be

given for the length of usage because it

depends on several factors.

The period of usage is prolonged by:

– Hand protection (wearing warm

gloves)

– Work breaks

The period of usage is shortened by:

– Any personal tendency to suffer

from poor circulation (symptoms:

frequently cold fingers, tingling

sensations).

– Low outside temperatures.

– The force with which the handles

are held (a tight grip restricts

circulation).

Your power tool produces

toxic exhaust fumes as

soon as the engine is

running. These fumes

may be colorless and

odorless and contain

unburned hydrocarbons

and benzol. Never run

the engine indoors or in

poorly ventilated loca-

tions, even if your model

is equipped with a cata-

lytic converter.

Keep your hands and feet

well away from the work-

ing tool. To reduce the

risk of injury, never touch

a rotating tool. Always

stand behind the deflec-

tor or to one side of the

machine during opera-

tion – never in front of the

rotating tools.

MM 55, MM 55 C

English

7

Continual and regular users should

monitor closely the condition of their

hands and fingers. If any of the above

symptoms appear (e.g. tingling

sensation in fingers), seek medical

advice.

Maintenance and Repairs

Service the machine regularly. Do not

attempt any maintenance or repair work

not described in the instruction manual.

Have all other work performed by a

servicing dealer.

STIHL recommends that you have

servicing and repair work carried out

exclusively by an authorized STIHL

servicing dealer. STIHL dealers are

regularly given the opportunity to attend

training courses and are supplied with

the necessary technical information.

Only use high-quality replacement parts

in order to avoid the risk of accidents

and damage to the machine. If you have

any questions in this respect, consult a

servicing dealer.

STIHL recommends the use of original

STIHL replacement parts. They are

specifically designed to match your

model and meet your performance

requirements.

To reduce the risk of injury, always shut

off the engine before carrying out any

maintenance or repairs or cleaning the

machine. – Exception: Carburetor and

idle speed adjustments.

Do not turn the engine over on the

starter with the spark plug boot or spark

plug removed unless the slide control /

stop switch is on STOP or 0 since there

is otherwise a risk of fire from

uncontained sparking.

To reduce the risk of fire, do not service

or store your machine near open flames.

Check the fuel filler cap for leaks at

regular intervals.

Use only a spark plug of the type

approved by STIHL and make sure it is

in good condition – see "Specifications".

Inspect the ignition lead (insulation in

good condition, secure connection).

Check the condition of the muffler.

To reduce the risk of fire and damage to

hearing, do not operate your machine if

the muffler is damaged or missing. –

Do not touch a hot muffler since burn

injury will result.

Maintenance, replacement, or repair of

the emission control devices and

systems may be performed by any

nonroad engine repair establishment or

individual. However, if you make a

warranty claim for a component which

has not been serviced or maintained

properly or if nonapproved replacement

parts were used, STIHL may deny

coverage.

For any maintenance please refer to the

maintenance chart and to the warranty

statement near the end of the instruction

manual.

The following STIHL MultiTools may be

mounted on the MultiEngine:

Approved MultiTools

MultiTool Application

BF-MM Pick tines

BK-MM Bolo tines

RL-MM Aerator

FC-MM Edger

FS-MM Clearing saw

MF-MM Dethatcher

KW-MM STIHL

PowerSweep

TM

KB-MM Bristle brush

9911BA000 KN

BF-MM

BK-MM

RL-MM

FC-MM

KB-MMKW-MM

MF-MM

FS-MM

MM 55, MM 55 C

English

8

N Loosen knob (1)

N Fold out bicycle handle in working

position as far as it will go

N Tighten knob

This engine is certified to operate on

unleaded gasoline and with the mix ratio

50:1.

Your engine requires a mixture of high-

quality premium gasoline and high-

quality two-stroke air-cooled engine oil.

Use premium branded unleaded

gasoline with a minimum octane rating

of 89 (R+M)/2.

Note: Models equipped with a catalytic

converter require unleaded gasoline. A

few tankfuls of leaded gasoline can

reduce the efficiency of the catalytic

converter by more than 50%.

Fuel with a lower octane rating may

result in preignition (causing "pinging")

which is accompanied by an increase in

engine temperature. This, in turn,

increases the risk of the piston seizure

and damage to the engine.

The chemical composition of the fuel is

also important. Some fuel additives not

only detrimentally affect elastomers

(carburetor diaphragms, oil seals, fuel

lines etc.), but magnesium castings as

well. This could cause running problems

or even damage the engine. For this

reason it is essential that you use only

high-quality fuels!

Fuels with different percentages of

ethanol are being offered. Ethanol can

affect the running behaviour of the

engine and increase the risk of lean

seizure.

Gasoline with an ethanol content of

more than 10% can cause running

problems and major damage in engines

with a manually adjustable carburetor

and should not be used in such engines.

Engines equipped with M-Tronic can be

run on gasoline with an ethanol content

of up to 25% (E25).

Use only STIHL two-stroke engine oil or

equivalent high-quality two-stroke air-

cooled engine oils for mixing.

We recommend STIHL 50:1 two-stroke

engine oil since it is specially formulated

for use in STIHL engines.

To ensure the maximum performance of

your STIHL engine, use a high quality 2-

cycle engine oil. To help your engine run

cleaner and reduce harmful carbon

deposits, STIHL recommends using

STIHL HP Ultra 2-cycle engine oil or ask

your dealer for an equivalent fully

synthetic 2-cycle engine oil.

To meet the requirements of EPA and

CARB we recommend to use STIHL HP

Ultra oil.

Do not use BIA or TCW (two-stroke

water cooled) mix oils!

Use only STIHL 50:1 heavy-duty engine

oil or an equivalent quality two-stroke

engine oil for the fuel mix in models

equipped with a catalytic converter.

Take care when handling gasoline.

Avoid direct contact with the skin and

avoid inhaling fuel vapour.

The canister should be kept tightly

closed in order to avoid any moisture

getting into the mixture.

Adjusting the bicycle handle

1

469BA007 KN

Fuel

MM 55, MM 55 C

English

9

The fuel tank and the canister in which

fuel mix is stored should be cleaned

from time to time.

Fuel mix ratio

Only mix sufficient fuel for a few days

work, not to exceed 30 days of storage.

Store in approved safety fuel-canisters

only. When mixing, pour oil into the

canister first, and then add gasoline.

Dispose of empty mixing-oil canisters

only at authorized disposal locations.

N Before fueling, clean the filler cap

and the area around it to ensure that

no dirt falls into the tank.

N Position the machine so that the

filler cap is facing up.

N Open the filler cap.

Take care not to spill fuel while fueling

and do not overfill the tank. STIHL

recommends you use the STIHL filler

nozzle (special accessory).

WARNING

After fueling, tighten down the filler cap

as securely as possible by hand.

Controls

1 Throttle trigger lockout

2 Throttle trigger

3 Slide control

Positions of slide control

4START – ignition is switched on –

the engine can start

5 F – normal run position – the engine

is running or can start

6STOP-0 – engine off – the ignition is

switched off

Examples

Gasoline Oil (STIHL 50:1 or equiva-

lent high-quality oils)

liters liters (ml)

10.02(20)

5 0.10 (100)

10 0.20 (200)

15 0.30 (300)

20 0.40 (400)

25 0.50 (500)

Fueling

232BA046 KN

Starting / Stopping the

Engine

1

4

56

7

3

START

2

STOP

002BA036 KN

MM 55, MM 55 C

English

10

Symbol on slide control

7 h – stop symbol and arrow. To stop

the engine, push the slide control in

the direction of the arrow on the stop

symbol (h) to STOP-0.

Starting

N Swing bike handle into working

position – see "Adjusting the Bike

Handle"

N Press down the trigger lockout lever

and squeeze the throttle trigger

N and hold them in that position.

N Move the slide control to START

and hold it there.

N Now release the throttle trigger,

slide control and trigger lockout in

that order. This is the starting

throttle position.

N Set the choke lever (8) to

N Press the manual fuel pump

bulb (9) at least five times – even if

the bulb is filled with fuel.

Cranking

N Retract the wheels, if fitted.

N Put the unit on the ground: It must

rest securely on the engine flange

and the support on the frame.

Check that the MultiTool is not

touching the ground or any other

obstacles – see also "Starting /

Stopping the Engine" in the

MultiTool instruction manual.

N Make sure you have secure footing

– as shown. To reduce the risk of

injury from contact with rotating

attachments, always stand to the

side of the power tool.

N With your left hand on the carrying

handle, press the unit firmly against

the ground.

NOTICE

Do not stand or kneel on the drive tube.

N Hold the starter grip with your right

hand.

Version without Easy2Start

N Pull the starter grip slowly until you

feel it engage and then give it a brisk

strong pull.

8

469BA033 KN

9

g if the engine is cold

e for warm start – also use this posi-

tion if the engine has been running

but is still cold.

469BA061 AS

469BA062 AS

469BA063 AS

MM 55, MM 55 C

English

11

NOTICE

Do not pull out the starter rope all the

way – it might otherwise break.

Version with Easy2Start

N Pull the starter grip slowly until you

feel it engage and then pull it out

slowly and steadily.

NOTICE

Do not pull out the starter rope all the

way – it might otherwise break.

Both versions

N Do not let the starter grip snap back.

Guide it slowly back into the housing

so that the starter rope can rewind

properly.

N Continue cranking.

When engine begins to fire

N After no more than five pulls, move

the choke lever (8) to e.

N continue cranking.

As soon as the engine runs

N Blip the throttle trigger – the engine

settles down to idle speed.

Your machine is now ready for

operation.

WARNING

Make sure the carburetor is correctly

adjusted. The working tool must not

rotate when the engine is idling.

Stopping the Engine

N Push the slide control in direction of

arrow h – to STOP-0.

If engine does not start

Choke lever

If you did not move the choke lever to e

quickly enough after the engine began to

fire, the combustion chamber is flooded.

N Set the choke lever to e.

N Set the slide control, trigger lockout

lever and throttle trigger to the

starting throttle position.

N Start the engine by pulling the

starter rope briskly – 10 to 20 pulls

may be necessary.

If the engine still does not start

N Move the slide control to STOP-0 .

N Remove the spark plug – see

"Spark Plug".

N Dry the spark plug.

N Crank the engine several times with

the starter to clear the combustion

chamber.

N Refit the spark plug – see "Spark

Plug".

N Move the slide control to F.

N Set the choke lever to e – even if

the engine is cold.

N Now start the engine.

Fuel tank run until completely dry

N After refueling, press the manual

fuel pump bulb at least five times –

even if the bulb is filled with fuel.

N Set the choke lever to suit the

engine temperature.

N Now start the engine.

8

469BA034 KN

MM 55, MM 55 C

English

12

An extra weight (special accessory) may

be retrofitted on the MultiEngine to

increase the weight on the MultiTool.

Use only original STIHL weights. The

use of other weights parts may result in

damage to the machine or personal

injury.

Mounting the extra weight

MultiEngine without wheels

Use the combination wrench to unscrew

and retighten the weights.

Unscrew weights on the side without

square end – as follows:

The weights (1) on the side with the

square end (2) remain on the bolt.

N Take out the hex head screw (3)

and remove the outer weight (4).

N Loosen the inner weight (5) and

remove it from the bolt.

N Push the extra weight (1) with bolt

through the bore (6) in the flange,

turning it until the square end (2)

engages the recess in the flange.

N Screw the inner weight (5) onto the

bolt and tighten it down firmly.

N Screw the outer weight (4) with the

hex head screw (3) into the thread

of the inner weight and tighten it

down firmly.

One of two weights may be mounted on

each side of the extra weight as

required.

NOTICE

The maximum allowable extra weight is

4 kg. Never use a heavier extra weight

as this may damage the machine.

MultiEngine with wheels

If the MultiEngine is already equipped

with wheels (special accessory), see

chapter on "Wheels", additional parts

are required to mount the extra weights.

In such a case have the extra weight

mounted by your servicing dealer.

STIHL recommends that you have

servicing and repair work carried out

exclusively by an authorized STIHL

servicing dealer.

Extra weight

469BA053 KN

1

2

3

4

5

Weight on each

side

Total extra weight

12kg

24kg

6

469BA054 KN

1

2

3

4

5

MM 55, MM 55 C

English

13

For convenient transport, the

MultiEngine can be retrofitted with a set

of wheels (special accessory).

Always use original STIHL wheels.

Using other wheels can lead to damage

to the machine and personal injuries.

Installing wheels

No additional weight is attached to the

MultiEngine

To simplify installation, turn the machine

so that it rests on the handles.

N Insert the two sleeves (1) in the

frame

N Push the frame onto the flange

N Insert the bolt (2) with the

washer (3) through the hole (4) in

the flange

N Fit the washer (3) and tighten it

down with the nut (5)

N Fasten the notched plate (6) to the

frame with the screws (7) in the

threaded holes – in the process,

push the notched plate toward the

handle

N The wheels must fold down

automatically in working position; if

necessary, loosen the nut (5) by a

quarter turn

Additional weight is attached to the

MultiEngine

If additional weight (special accessory) –

see "Additional weight" – is already

attached to the MultiEngine, then

additional parts are required in order to

install wheels.

In this case, have the wheels installed by

a servicing dealer.

STIHL recommends that maintenance

and repair work be carried out only by

authorized STIHL dealers.

Folding the wheels in and out

The wheels can be locked in various

positions.

If the wheels are not needed during

work, fold in the wheels.

N Loosen knob (8)

N Engage knob in the desired working

position and tighten it

Wheels

3

6

469BA035 KN

2

4

1

7

5

3

1

8

469BA036 KN

MM 55, MM 55 C

English

14

During break-in period

A factory-new machine should not be

run at high revs (full throttle off load) for

the first three tank fillings. This avoids

unnecessary high loads during the

break-in period. As all moving parts

have to bed in during the break-in

period, the frictional resistances in the

engine are greater during this period.

The engine develops its maximum

power after about 5 to 15 tank fillings.

During Operation

After a long period of full throttle

operation, allow the engine to run for a

short while at idle speed so that engine

heat can be dissipated by the flow of

cooling air. This protects engine-

mounted components (ignition,

carburetor) from thermal overload.

After Finishing Work

Storing for a short period: Wait for the

engine to cool down. Empty the fuel tank

and keep the machine in a dry place,

well away from sources of ignition, until

you need it again. For longer out-of-

service periods – see "Storing the

Machine".

If there is a noticeable loss of engine

power

N Set choke lever to g

N Remove screw (1)

N Remove filter cover (2)

N Remove coarse dirt from inside the

filter cover and around the filter

N Remove the air filter (3)

N Check the air filter – replace if

necessary

NOTICE

Replace any damaged parts.

N Insert air filter (3) in the filter

housing (4)

N Refit the filter cover and screw it

down

Operating Instructions Replacing the Air Filter

1

469BA037 KN

2

469BA038 KN

3

4

MM 55, MM 55 C

English

15

Exhaust emissions are controlled by the

design of the fundamental engine

parameters and components (e.g.

carburation, ignition, timing and valve or

port timing) without the addition of any

major hardware.

General Information

The carburetor comes from the factory

with a standard setting.

This setting provides an optimum fuel-air

mixture under most operating

conditions.

Preparations

N Shut off the engine.

N Mount the MultiTool.

N Check the air filter and clean or

replace if necessary.

N Check the spark arresting screen

(not in all models, country-specific)

in the muffler and clean or replace if

necessary.

Standard Setting

N Turn high speed screw (H)

counterclockwise as far as stop (no

more than 3/4 turn).

N Turn the low speed screw (L)

clockwise as far as stop, then turn it

back 3/4 turn.

Adjusting Idle Speed

N Carry out the standard setting.

N Start and warm up the engine for

3 minutes.

Engine Management Adjusting the Carburetor

469BA058 KN

L

MM 55, MM 55 C

English

16

Engine stops while idling

N Turn the idle speed screw (LA)

clockwise until the engine runs

smoothly – the cutting/working

attachment must not rotate.

Attachment runs when engine is idling

N Turn the idle speed screw (LA)

counterclockwise until the

cutting/working attachment stops

moving and then turn the screw

another 1/2 to 1 full turn in the same

direction.

WARNING

If the cutting/working attachment

continues to run when the engine is

idling, have your machine checked and

repaired by your servicing dealer.

Erratic idling behavior, poor acceleration

(despite correction to setting of LA

screw).

Idle setting is too lean

N Turn the low speed screw (L)

carefully counterclockwise, no

further than stop, until the engine

runs smoothly and accelerates well.

Erratic idling behavior

Idle setting is too rich

N Turn the low speed screw (L) slowly

clockwise until the engine runs and

accelerates smoothly.

It is usually necessary to change the

setting of the idle speed screw (LA) after

every correction to the low speed

screw (L).

Fine Tuning for Operation at High

Altitude

A slight correction of the setting may be

necessary if the engine does not run

satisfactorily:

N Carry out the standard setting.

N Warm up the engine.

N Turn high speed screw (H) slightly

clockwise (leaner) – no further than

stop.

NOTICE

After returning from high altitude, reset

the carburetor to the standard setting.

If the setting is too lean there is a risk of

engine damage due to insufficient

lubrication and overheating.

N If the engine is down on power,

difficult to start or runs poorly at idle

speed, first check the spark plug.

N Fit a new spark plug after about 100

operating hours – or sooner if the

electrodes are badly eroded. Install

only suppressed spark plugs of the

type approved by STIHL – see

"Specifications".

Remove the spark plug

N Move the slide control to STOP-0

N Unplug spark plug boot (1)

N Unscrew spark plug

469BA059 KN

L

Spark Plug

1

232BA081 KN

MM 55, MM 55 C

English

17

Checking the Spark Plug

N Clean dirty spark plug.

N Check electrode gap (A) and

readjust if necessary – see

"Specifications".

N Rectify the problems which have

caused fouling of the spark plug.

Possible causes are:

– Too much oil in fuel mix.

– Dirty air filter.

– Unfavorable running conditions.

WARNING

Arcing may occur if the adapter nut (1) is

loose or missing. Working in an easily

combustible or explosive atmosphere

may cause a fire or an explosion. This

can result result in serious injuries or

damage to property.

N Use resistor type spark plugs with a

properly tightened adapter nut.

Installing the spark plug

N Screw home the spark plug, fit the

boot and press it down firmly.

If engine running behavior is

unsatisfactory even though the air filter

is clean and the carburetor is properly

adjusted, the cause may be the muffler.

Have the muffler checked for

contamination (carbonization) by your

servicing dealer.

STIHL recommends that you have

servicing and repair work carried out

exclusively by an authorized STIHL

servicing dealer.

000BA039 KN

A

1

000BA045 KN

Engine Running Behavior

MM 55, MM 55 C

English

18

If the machine is to remain out of use for

approx. 3 months or more

N Drain and clean the fuel tank in a

well ventilated place

N Ensure that the fuel is disposed of

correctly and without harming the

environment

N Run the engine until the carburetor

is dry, this helps to prevent the

carburetor diaphragms sticking

together

N Thoroughly clean the machine - pay

special attention to the cylinder fins

and air filter

N Remove, clean and inspect the

working tool

N Store machine in a safe and dry

place. Protect against unauthorized

use (e. g., by children)

The folded-up machine can be

suspended by the support from a hook.

Maintenance Work

STIHL recommends that you have

servicing and repair work carried out

exclusively by an authorized STIHL

servicing dealer.

Fuel Pickup Body in Tank

N Have the pickup body in the fuel

tank replaced every year.

Spark Arrestor in Muffler

N If the engine is down on power,

have the spark arrestor in the

muffler checked.

Storing the Machine

469BA002 KN

Inspections and Maintenance

by Dealer

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STIHL MM 55 User manual

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