Stihl Mm 56 User manual

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STIHL MM 56

WARNING

Read Instruction Manual thoroughly

before use and follow all safety

precautions – improper use can

cause serious or fatal injury.

ADVERTENCIA

Antes de usar la máquina lea y siga

todas las precauciones de

seguridad dadas en el manual de

instrucciones – el uso incorrecto

puede causar lesiones graves o

mortales.

Instruction Manual

Manual de instrucciones

Instruction Manual

1 - 27

Manual de instrucciones

28 - 60

Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-489-8621-A. VA0.K17.

0000007928_001_GB

MM 56 C

English

with electronic systems.

Contents

Allow only persons who fully understand

the manuals of the MultiEngine and the

MultiTool to operate your power tool.

To receive maximum performance and

satisfaction from your STIHL power tool,

it is important that you read, understand

and follow the safety precautions and

the operating and maintenance

instructions in chapter "Safety

Precautions and Working Techniques"

before using your power tool. For further

information you can go to

www.stihlusa.com.

Contact your STIHL dealer or the STIHL

distributor for your area if you do not

understand any of the instructions in the

two manuals.

WARNING

Because this MultiEngine is the engine

for a high-speed power tool, some

special safety precautions must be

observed to reduce the risk of personal

injury. Careless or improper use may

cause serious or even fatal injury.

Make sure your unit is equipped with the

proper deflector for the type of cutting

attachment being used. Always wear

proper eye protection.

MultiSystem 2

Guide to Using this Manual 2

Safety Precautions and Working

Techniques 3

Approved MultiTools 9

Adjusting the bicycle handle 10

Fuel 10

Fueling 11

Starting / Stopping the Engine 12

Extra weight 14

Wheels 15

Operating Instructions 16

Replacing the Air Filter 16

Engine Management 17

Adjusting the Carburetor 17

Spark Arresting Screen in Muffler 17

Spark Plug 18

Engine Running Behavior 19

Storing the Machine 19

Maintenance and Care 20

Main Parts 21

Specifications 22

Maintenance and Repairs 23

Disposal 23

Limited Warranty 24

STIHL Incorporated Federal

Emission Control Warranty

Statement 24

Trademarks 26

MM 56 C

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In the STIHL MultiSystem a number of

different MultiEngines and MultiTools

can be combined to produce a power

tool. In this instruction manual the

functional unit formed by the

MultiEngine and MultiTool is referred to

as the power tool.

Therefore, the separate instruction

manuals for the MultiEngine and

MultiTool should be used together for

the power tool.

Always read and and make sure you

understand both instruction manuals

before using your power tool for the first

time and keep them in a safe place for

future reference.

Pictograms

All the pictograms attached to or

embossed on the machine are shown

and explained in this manual.

Symbols in Text

Many operating and safety instructions

are supported by illustrations.

The individual steps or procedures

described in the manual may be marked

in different ways:

NA bullet marks a step or procedure.

A description of a step or procedure that

refers directly to an illustration may

contain item numbers that appear in the

illustration. Example:

NLoosen the screw (1).

NLever (2) ...

In addition to the operating instructions,

this manual may contain paragraphs

that require your special attention. Such

paragraphs are marked with the

following symbols and signal words:

DANGER

Indicates an imminent risk of severe or

fatal injury.

WARNING

Indicates a hazardous situation which, if

not avoided, could result in severe or

fatal injury.

NOTICE

Indicates a risk of property damage,

including damage to the machine or its

individual components.

Engineering Improvements

STIHL’s philosophy is to continually

improve all of its products. As a result,

engineering changes and improvements

are made from time to time. Therefore,

some changes, modifications and

improvements may not be covered in

this manual. If the operating

characteristics or the appearance of

your machine differs from those

described in this manual, please contact

your STIHL dealer or the STIHL

distributor for your area for assistance.

MultiSystem

0000-GXX-5900-A0

Guide to Using this Manual

MM 56 C

English

Have your STIHL dealer show you how

to operate your power tool. Observe all

applicable local safety regulations,

standards and ordinances.

WARNING

Do not lend or rent your power tool

without the instruction manual. Be sure

that anyone using it understands the

information contained in this manual.

Use your power tool only for the

applications described in the instruction

manual of the MultiTool you are using.

WARNING

Do not use it for other purposes, since

misuse may result in personal injury or

property damage, including damage to

the machine.

WARNING

Minors should never be allowed to use

this power tool. Bystanders, especially

children, and animals should not be

allowed in the area where it is in use.

WARNING

To reduce the risk of injury to bystanders

and damage to property, never let your

power tool run unattended. When it is

not in use (e.g. during a work break),

shut it off and make sure that

unauthorized persons do not use it.

Most of these safety precautions and

warnings apply to the use of all STIHL

power tools. Different models may have

different parts and controls. See the

appropriate section of your MultiEngine

and MultiTool instruction manuals for a

description of the controls and the

function of the parts of your model.

Safe use of a power tool involves

1. the operator

2. the power tool

3. the use of the power tool

THE OPERATOR

Physical Condition

You must be in good physical condition

and mental health and not under the

influence of any substance (drugs,

alcohol, etc.) which might impair vision,

dexterity or judgment. Do not operate

this machine when you are fatigued.

WARNING

Be alert – if you get tired, take a break.

Tiredness may result in loss of control.

Working with any power tool can be

strenuous. If you have any condition that

might be aggravated by strenuous work,

check with your doctor before operating

this machine.

WARNING

Prolonged use of a power tool (or other

machines) exposing the operator to

vibrations may produce whitefinger

disease (Raynaud's phenomenon) or

carpal tunnel syndrome.

These conditions reduce the hand's

ability to feel and regulate temperature,

produce numbness and burning

sensations and may cause nerve and

circulation damage and tissue necrosis.

All factors which contribute to

whitefinger disease are not known, but

cold weather, smoking and diseases or

physical conditions that affect blood

vessels and blood transport, as well as

high vibration levels and long periods of

exposure to vibration are mentioned as

factors in the development of whitefinger

disease. In order to reduce the risk of

whitefinger disease and carpal tunnel

syndrome, please note the following:

–Wear gloves and keep your hands

warm.

–A power tool with loose components

will tend to have higher vibration

levels.

–Maintain a firm grip at all times, but

do not squeeze the handles with

constant, excessive pressure. Take

frequent breaks.

Safety Precautions and

Working Techniques

Because this MultiEngine

is the engine for a high-

speed power tool, special

safety precautions must

be observed to reduce

the risk of personal injury.

It is important that you

read, fully understand

and observe the following

safety precautions and

warnings. Read the

instruction manuals and

the safety precautions of

your MultiEngine and

MultiTool periodically.

Careless or improper use

may cause serious or

fatal injury.

MM 56 C

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All the above-mentioned precautions do

not guarantee that you will not sustain

whitefinger disease or carpal tunnel

syndrome. Therefore, continual and

regular users should closely monitor the

condition of their hands and fingers. If

any of the above symptoms appear,

seek medical advice immediately.

WARNING

The ignition system of the STIHL unit

produces an electromagnetic field of a

very low intensity. This field may

interfere with some pacemakers. To

reduce the risk of serious or fatal injury,

persons with a pacemaker should

consult their physician and the

pacemaker manufacturer before

operating this tool.

Proper Clothing

WARNING

To reduce the risk of injury, the operator

should wear proper protective apparel.

WARNING

Be particularly alert and cautious when

wearing hearing protection because

your ability to hear warnings (shouts,

alarms, etc.) is restricted.

For further instructions on proper

clothing see the safety precautions in

the instruction manual of the MultiTool

you are using.

THE POWER TOOL

For illustrations and definitions of the

power tool parts see the chapter on

"Main Parts."

WARNING

Never modify this power tool in any way.

Only attachments supplied by STIHL or

expressly approved by STIHL for use

with the specific STIHL MultiEngine

model are authorized. Although certain

unauthorized attachments are useable

with STIHL power tools, their use may,

in fact, be extremely dangerous.

If this tool is subjected to unusually high

loads for which it was not designed (e.g.

heavy impact or a fall), always check

that it is in good condition before

continuing work. Check in particular that

the fuel system is tight (no leaks) and

that the controls and safety devices are

working properly. Do not continue

operating this machine if it is damaged.

In case of doubt, have it checked by your

STIHL servicing dealer.

THE USE OF THE POWER TOOL

Transporting the Power Tool

WARNING

Always switch off the engine and make

sure the working tool has stopped before

putting a power tool down. When

transporting your power tool in a vehicle,

properly secure it to prevent turnover,

fuel spillage and damage to the power

tool.

To reduce the risk of

injury to your eyes never

operate your sprayer

unless wearing goggles

or properly fitted protec-

tive glasses with

adequate top and side

protection complying with

ANSI Z87 "+" (or your

applicable national stand-

ard). To reduce the risk of

injury to your face STIHL

recommends that you

also wear a face shield or

face screen over your

goggles or protective

glasses.

Power tool noise may

damage your hearing.

Wear sound barriers (ear

plugs or ear mufflers) to

protect your hearing.

Continual and regular

users should have their

hearing checked

regularly.

Good footing is very

important. Wear sturdy

boots with nonslip soles.

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Fuel

Your STIHL power tool uses an oil-

gasoline mixture for fuel (see the

chapter on "Fuel" of your instruction

manual).

WARNING

Fueling Instructions

WARNING

Fuel your power tool in well-ventilated

areas, outdoors. Always shut off the

engine and allow it to cool before

refueling. Gasoline vapor pressure may

build up inside the fuel tank depending

on the fuel used, the weather conditions

and the tank venting system.

In order to reduce the risk of burns and

other personal injury from escaping gas

vapor and fumes, remove the fuel filler

cap on your power tool carefully so as to

allow any pressure build-up in the tank

to release slowly. Never remove the fuel

filler cap while the engine is running.

Select bare ground for fueling and move

at least 10 feet (3 m) from the fueling

spot before starting the engine. Wipe off

any spilled fuel before starting your

machine.

WARNING

In order to reduce the risk of fuel spillage

and fire from an improperly tightened

fuel cap, correctly position and tighten

the fuel cap in the fuel tank opening.

WARNING

See also the safety precautions on

Starting in the instruction manual of the

MultiTool.

Important Adjustments

WARNING

To reduce the risk of personal injury

from loss of control or contact with the

running working tool, do not use a power

tool with incorrect idle adjustment. At

correct idle speed, the working tool

should not move. For directions on how

to adjust idle speed, see the appropriate

section of your instruction manual.

If you cannot set the correct idle speed,

have your STIHL dealer check your

power tool and make proper

adjustments and repairs.

During Operation

Holding and Controlling the Power Tool

Always hold the unit firmly with both

hands on the handles while you are

working. Wrap your fingers and thumbs

around the handles, keeping the

handles cradled between your thumb

and forefinger. Keep your hands in this

position to have your power tool under

control at all times.

WARNING

To reduce the risk of injury from loss of

control, never work on a ladder or on any

other insecure support.

Working Conditions

Operate and start your power tool only

outdoors in a well ventilated area.

Operate it under good visibility and

daylight conditions only. Work carefully.

WARNING

Inhalation of certain dusts, especially

organic dusts such as mold or pollen,

can cause susceptible persons to have

an allergic or asthmatic reaction.

5m (16ft)

469BA045 KN

As soon as the engine is

running, this product gen-

erates toxic exhaust

fumes containing chemi-

cals, such as unburned

hydrocarbons (including

benzene) and carbon

monoxide, that are

known to cause respira-

tory problems, cancer,

birth defects, or other

reproductive harm. Some

of the gases (e.g. carbon

monoxide) may be color-

less and odorless. To

reduce the risk of serious

or fatal injury / illness

from inhaling toxic fumes,

never run the machine

indoors or in poorly venti-

lated locations.

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Substantial or repeated inhalation of

dust and other airborne contaminants, in

particular those with a smaller particle

size, may cause respiratory or other

illnesses. Control dust at the source

where possible. Use good work

practices, such as operating the unit so

that the wind or operating process

directs any dust raised by the power tool

away from the operator. Follow the

recommendations of EPA / OSHA /

NIOSH and occupational and trade

associations with respect to dust

("particulate matter"). When the

inhalation of dust cannot be

substantially controlled, i.e., kept at or

near the ambient (background) level, the

operator and any bystanders should

wear a respirator approved by NIOSH /

MSHA for the type of dust encountered.

Operating Instructions

WARNING

Do not operate your power tool using the

starting throttle lock, as you do not have

control of the engine speed.

In the event of an emergency, switch off

the engine immediately by pressing the

stop switch.

WARNING

Never modify your muffler. Any

modification could cause an increase in

heat radiation, sparks or sound level,

thereby increasing the risk of fire, burn

injury or hearing loss. You may also

permanently damage the engine. Have

your muffler serviced and repaired by

your STIHL servicing dealer only.

WARNING

The muffler and other parts of the engine

(e.g. fins of the cylinder, spark plug)

become hot during operation and remain

hot for a while after stopping the engine.

To reduce risk of burns, do not touch the

muffler and other parts while they are

hot. Keep the area around the muffler

clean. Remove excess lubricant and all

debris such as pine needles, branches

or leaves. Let the engine cool down

sitting on concrete, metal, bare ground

or solid wood away from any

combustible substances.

WARNING

An improperly mounted or damaged

cylinder housing or a

damaged/deformed muffler shell may

interfere with the cooling process of the

muffler. To reduce the risk of fire or burn

injury, do not continue work with a

damaged or improperly mounted

cylinder housing or a

damaged/deformed muffler shell.

Your muffler is furnished with a spark

arresting screen designed to reduce the

risk of fire from the emission of hot

particles. Never operate your unit with a

missing or damaged spark arresting

screen. If your gas/oil mix ratio is correct

(i.e., not too rich), this screen will

normally stay clean as a result of the

heat from the muffler and need no

service or maintenance. If you

experience loss of performance and you

suspect a clogged screen, have your

muffler maintained by a STIHL servicing

dealer. Some state or federal laws or

regulations may require a properly

maintained spark arrestor for certain

uses. See the "Maintenance, Repair and

Storing" section of these Safety

Precautions. Remember that the risk of

a brush or forest fire is greater in hot or

dry conditions.

MAINTENANCE, REPAIR AND

STORING

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.

WARNING

Use only identical STIHL replacement

parts for maintenance and repair. Use of

non-STIHL parts may cause serious or

fatal injury.

Strictly follow the maintenance and

repair instructions in the appropriate

section of your MultiEngine and

MultiTool instruction manuals. Please

refer to the maintenance charts

respectively the maintenance notes in

these manuals.

WARNING

Always stop the engine and make sure

that the working tool is stopped before

doing any maintenance or repair work or

cleaning the power tool. Do not attempt

any maintenance or repair work not

described in your MultiEngine and

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MultiTool instruction manuals. Have

such work performed by your STIHL

servicing dealer only.

Wear gloves when handling or

performing maintenance on any blade.

WARNING

Never repair damaged working tools by

welding, straightening or modifying the

shape. This may cause parts of the

working tool to come off and result in

serious or fatal injuries.

WARNING

Use the specified spark plug and make

sure it and the ignition lead are always

clean and in good condition. Always

press spark plug boot snugly onto spark

plug terminal of the proper size. (Note: If

terminal has a detachable SAE adapter

nut, it must be attached.) A loose

connection between spark plug boot and

the ignition wire connector in the boot

may create arcing that could ignite

combustible fumes and cause a fire.

WARNING

Never test the ignition system with the

ignition wire boot removed from the

spark plug or with a removed spark plug,

since uncontained sparking may cause

a fire.

WARNING

Do not operate your power tool if the

muffler is damaged, missing or modified.

An improperly maintained muffler will

increase the risk of fire and hearing loss.

Your muffler is equipped with a spark-

arresting screen to reduce the risk of

fire; never operate your power tool if the

screen is missing, damaged or clogged.

Remember that the risk of a brush or

forest fire is greater in hot or dry

weather.

In California, it is a violation of § 4442 or

§ 4443 of the Public Resources Code to

use or operate gasoline-powered tools

on forest-covered, brush-covered or

grass-covered land unless the engine’s

exhaust system is equipped with a

complying spark arrester that is

maintained in effective working order.

The owner/operator of this product is

responsible for properly maintaining the

spark arrester. Other states or

governmental entities/agencies, such as

the U.S. Forest Service, may have

similar requirements. Contact your local

fire agency or forest service for the laws

or regulations relating to fire protection

requirements.

Tighten all nuts, bolts and screws,

except the carburetor adjustment

screws, after each use.

Do not clean your machine with a

pressure washer. The solid jet of water

may damage parts of the machine.

Store the power tool in a dry and high or

locked location out of reach of children.

Before storing for longer than a few

days, always empty the fuel tank. See

chapter "Storing the Machine" in 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

PowerSweepTM

KB-MM Bristle brush

9911BA000 KN

BF-MM

BK-MM

RL-MM

FC-MM

KB-MMKW-MM

MF-MM

FS-MM

MM 56 C

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NLoosen the knob (1).

NSwing the bicycle handle into the

working position (as far as stop).

NTighten down the knob firmly.

This engine is certified to operate on

unleaded gasoline and the STIHL two-

stroke engine oil at a mix ratio of 50:1.

Your engine requires a mixture of high-

quality gasoline and two-stroke air

cooled engine oil.

Use mid-grade unleaded gasoline with a

minimum octane rating of 89 ((R+M)/2)

and no more than 10% ethanol content.

NOTICE

Fuel with an octane rating below 89 may

increase engine temperatures. This, in

turn, increases the risk of 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 and

catalytic converters as well. This could

cause running problems or damage the

engine. For this reason STIHL

recommends that you use only quality

unleaded gasoline!

NOTICE

Gasoline with an ethanol content of

more than 10% can cause running

problems and major damage in engines

and should not be used.

For further details, see

www.STIHLusa.com/ethanol

The ethanol content in gasoline affects

engine speed – it may be necessary to

readjust the carburetor if you use fuels

with various ethanol contents.

WARNING

To reduce the risk of personal injury

from loss of control and/or contact with

the running cutting tool, do not use your

unit with an incorrect idle adjustment. At

correct idle speed, the cutting tool

should not move.

If your machine’s idle speed is

incorrectly adjusted, have your

authorized STIHL servicing dealer

check your machine and make the

proper adjustments and repairs.

The idle speed and maximum speed of

the engine change if you switch from a

fuel with a certain ethanol content to a

fuel with a much higher or lower ethanol

content.

This problem can be avoided by always

using fuel with the same ethanol

content.

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.

STIHL MotoMix

STIHL recommends the use of STIHL

MotoMix. STIHL MotoMix has a high

octane rating and ensures that you

always use the right gasoline/oil mix

ratio.

Adjusting the bicycle handle

0000-GXX-0549-A1

Fuel

MM 56 C

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STIHL MotoMix uses STIHL HP Ultra

two-stroke engine oil suited for high

performance engines.

For further details, see

www.STIHLusa.com/ethanol

If not using MotoMix, use only STIHL

two-stroke engine oil or equivalent high-

quality two-stroke engine oils that are

designed for use in air cooled two-cycle

engines.

The use of non-seasonal gasoline

blends may increase the potential for

pressure to build in the fuel tank during

operation. For example, using a winter

blend during the summer will increase

pressure in the fuel tank. Always use

gasoline blends appropriate to the

season, altitude and other

environmental factors.

Do not use BIA or TCW rated (two-

stroke water cooled) mix oils or other

mix oils that state they are for use in both

water cooled and air cooled engines

(e.g., outboard motors, snowmobiles,

chain saws, mopeds, etc.).

WARNING

Take care when handling gasoline.

Avoid direct contact with the skin and

avoid inhaling fuel vapor. When filling at

the pump, first remove the container

from your vehicle and place the

container on the ground before filling. To

reduce the risk of sparks from static

discharge and resulting fire and/or

explosion, do not fill fuel containers that

are sitting in or on a vehicle or trailer.

The container should be kept tightly

closed in order to limit the amount of

moisture that gets into the mixture.

The machine‘s fuel tank should be

cleaned as necessary.

Fuel mix ages

If not using MotoMix, only mix sufficient

fuel for a few days of work, not to exceed

30 days of storage. Store in approved

fuel-containers only. When mixing, pour

oil into the container first, and then add

gasoline. Close the container and shake

it vigorously by hand to ensure proper

mix of oil and gasoline.

Dispose of empty mixing-oil containers

only at authorized disposal locations.

Preparations

NBefore fueling, clean the filler cap

and the area around it to ensure that

no dirt falls into the tank.

Always thoroughly shake the mixture in

the canister before fueling your

machine.

NPosition the machine so that the

filler cap is facing up.

WARNING

To reduce the risk of fire and personal

injuries due to escaping fuel and vapor,

remove the fuel filler cap carefully so

that any excess pressure in the tank can

escape slowly. Use the proper seasonal

gasoline blend, i.e., winter blend in

winter, summer blend in summer.

Gaso-

line

Oil (STIHL 50:1 or equiva-

lent high-quality oils)

US gal. US fl.oz.

12.6

2 1/2 6.4

5 12.8

Fueling

547BA045 KN

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Opening the threaded filler cap

NTurn the cap counterclockwise until

it can be removed from the tank

opening.

NRemove the filler cap.

Refueling

Take care not to spill fuel while fueling

and do not overfill the tank.

Closing the threaded filler cap

NPosition cap.

NTurn the cap clockwise as far as it

will go and tighten it as securely as

possible by hand.

Controls

1Throttle Trigger Lockout

2Throttle Trigger

3Stop switch with Run and Stop

positions. Depress the stop switch

(…) to switch off the ignition – see

"Function of stop switch and ignition

system".

Function of stop switch and ignition

system

The ignition is switched off and the

engine stopped when the stop switch is

depressed. The stop switch returns

automatically to the Run position when it

is released: The ignition is switched on

again after the engine stops – the engine

is then ready to start.

Starting the Engine

NSwing bicycle handle into working

position – see "Adjusting the Bicycle

Handle"

NDepress the manual fuel pump

bulb (4) at least five times – even if

the bulb is filled with fuel.

Cold engine (cold start)

NDepress the choke knob (5) and

turn it to g at the same time.

002BA447 KN

002BA448 KN

Starting / Stopping the

Engine

0000-GXX-0538-A0

0000-GXX-0540-A0

0000-GXX-0539-A0

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Warm engine (warm start)

NDepress in the choke knob (5) and

turn it to < at the same time.

Also use this setting if the engine has

been running but is still cold.

Cranking

NRetract the wheels, if fitted.

NPut 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.

NMake 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.

NWith your left hand on the carrying

handle, press the unit firmly against

the ground.

NOTICE

Do not stand or kneel on the shaft.

NHold the starter grip with your right

hand.

NPull the starter grip steadily.

NOTICE

Do not pull out the starter rope all the

way – it might otherwise break.

NDo not let the starter grip snap back.

Guide it slowly back into the housing

so that the starter rope can rewind

properly.

NContinue cranking until the engine

runs.

As soon as the engine runs

NPress down the throttle trigger

lockout and open the throttle – the

choke lever moves to the run

position F. After a cold start, warm

up the engine by opening the

throttle several times.

WARNING

Make sure the carburetor is correctly

adjusted. The MultiTool must not rotate

when the engine is idling.

Your machine is now ready for

operation.

Stopping the Engine

NDepress the momentary contact

stop switch – the engine stops –

release the stop switch – it springs

back to the run position.

0000-GXX-0541-A0

0000-GXX-0545-A0

0000-GXX-0546-A0

0000-GXX-0542-A0

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Other Hints on Starting

Engine stalls in cold start position g or

under acceleration.

NMove the choke knob to < and

continue cranking until the engine

runs.

Engine does not start in warm start

position <

NMove the choke knob to g and

continue cranking until the engine

runs.

If the engine does not start

NCheck that all settings are correct.

NCheck that there is fuel in the tank

and refuel if necessary.

NCheck that the spark plug boot is

properly connected.

NRepeat the starting procedure.

Engine is flooded

NMove the choke knob to F and

continue cranking until the engine

runs.

Fuel tank run until completely dry

NAfter refueling, depress the manual

fuel pump bulb at least five times –

even if the bulb is already filled with

fuel.

NSet the choke knob to suit the

engine temperature.

NNow start the engine.

To increase the weight on the MultiTool,

the MultiEngine can be retrofitted with

an additional weight (special

accessory).

Always use original STIHL additional

weight. Using other weights can lead to

damage to the machine and personal

injuries.

Attaching additional weight

No wheels are attached to the

MultiEngine

Use the combination wrench to loosen

and tighten the weights.

Detach the weights on the side without

the square – to do this:

The weights (1) on the side with the

square (2) remain mounted on the bolt.

NUnscrew the hexagon head bolt (3)

and remove the outer weight (4)

NDetach the inner weight (5) and

remove it from the bolt

NPush additional weight (1) with bolt

through the hole (6) in the flange; in

the process, rotate it until the

square (2) engages in the opening

in the flange

NTurn the inner weight (5) onto the

bolt and tighten

NFasten outer weight (4) with the

hexagon head bolt (3) in the thread

of the inner weight and tighten

One or two weights can be mounted on

each side of the additional weight as

needed.

NOTICE

The maximum additional weight is

8.8 lbs. (4 kg). Never use higher

additional weight. This can cause

damage to the machine.

Wheels are attached to the MultiEngine

If wheels (special accessory) – see

"Wheels" – are already attached to the

MultiEngine, then additional parts are

required in order to install the additional

weight.

Extra weight

469BA053 KN

123

Weights on

each side

Additional weight,

total

1 4.4 lbs. (2 kg)

2 8.8 lbs. (4 kg)

469BA054 KN

123

MM 56 C

English

In this case, have the additional weight

installed by a servicing dealer.

STIHL recommends that maintenance

and repair work be carried out only by

authorized STIHL dealers.

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.

NInsert the two sleeves (1) in the

frame

NPush the frame onto the flange

NInsert the bolt (2) with the

washer (3) through the hole (4) in

the flange

NFit the washer (3) and tighten it

down with the nut (5)

NFasten 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

NThe 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.

Wheels

469BA035 KN

241

MM 56 C

English

NLoosen knob (8)

NEngage knob in the desired working

position and tighten it

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

NMove the choke lever (1) to <.

NLoosen the screws (2).

NRemove the filter cover (3).

NClean away loose dirt from around

the filter.

NRemove the filter element (4).

NReplace dirty or damaged filter

element (4).

Replacing the filter element

NInstall the filter element (4) in the

filter housing (5) and fit the cover.

NInsert the screws (2) and tighten

them down firmly.

469BA036 KN

Operating Instructions Replacing the Air Filter

0000-GXX-0543-A0

MM 56 C

English

Exhaust emissions are controlled by the

design of the engine and components

(e.g. carburation, ignition, timing and

valve or port timing).

The carburetor has been set at the

factory to provide an optimum fuel-air

mixture under most operating

conditions.

Adjusting Idle Speed

Engine stops while idling

NWarm up the engine for about

3 minutes.

NTurn the idle speed screw (LA)

slowly clockwise until the engine

runs smoothly – the MultiTool must

not run.

MultiTool runs when the engine is idling

NTurn the idle speed screw (LA)

counterclockwise until the MultiTool

stops moving and then turn the

screw about another 1/2 to 3/4 turn

in the same direction.

WARNING

If the MultiTool continues to run when

the engine is idling, have your machine

checked and repaired by your servicing

dealer.

NIf the engine is down on power,

check the spark arresting screen in

the muffler.

NWait for the muffler to cool down.

NUse the combination wrench to

unscrew the spark arrestor.

NClean the spark arrestor screen. If

the screen is damaged or heavily

carbonized, fit a new one.

NInsert the spark arrestor and tighten

it down firmly with the combination

wrench.

Engine Management Adjusting the Carburetor

0000-GXX-0544-A0

Spark Arresting Screen in

Muffler

0000-GXX-0145-A0

MM 56 C

English

If there is a loss of engine power, the

machine is difficult to start or runs poorly

at idle, first check the spark plug.

Install a new spark plug after approx.

100 operating hours or earlier if the

electrodes are eroded/corroded.

The wrong fuel mix (too much engine oil

in the gasoline), a dirty air filter and

unfavorable running conditions (mostly

at part throttle etc.) affect the condition

of the spark plug. These factors cause

deposits to form on the insulator nose,

which may degrade performance.

Removing the Spark Plug

NShut off the engine.

NRemove the spark plug boot (1).

NUnscrew the spark plug (2).

Checking the spark plug

NClean the spark plug if it is dirty

NCheck the electrode gap (A) and

readjust if necessary – see

"Specifications"

NUse only resistor type spark plugs of

the approved range. See the

chapter "Specifications" in this

instruction manual

Correct the problems that have caused

fouling of the spark plug:

–too much oil in fuel mix,

–dirty air filter,

–unfavorable running conditions, e.g.

operating at part throttle.

WARNING

To reduce the risk of fire and burn injury,

use only spark plugs authorized by

STIHL. Always press the spark plug

boot (1) firmly and securely onto the

spark plug terminal (2).

Do not use a spark plug with a

detachable SAE adapter terminal (3).

Arcing may occur that could ignite

combustible fumes and cause a fire.

This can result in serious injuries or

damage to property.

NOnly use resistor type spark plugs

with solid, non-threaded terminals

Installing the Spark Plug

NScrew the spark plug into the

cylinder.

NPress the boot firmly onto the spark

plug.

Spark Plug

547BA041 KN

000BA039 KN

0000-GXX-1830-A0

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