STIHL MM 55 BF Owner's Manual
STIHL BF-MM, BK-MM
Warning!
Read and follow all safety
precautions in Instruction Manual –
improper use can cause serious or
fatal injury.
Advertencia!
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 - 16
Manual de
instrucciones
17 - 33
Contents
English
MultiSystem 2
Guide to Using this Manual 2
Safety Precautions and Working
Techniques 3
Using the Unit 9
Approved MultiEngines 11
Mounting the MultiTool 11
Starting / Stopping the Engine 12
Original Instruction ManualPrinted on chlorine-free paper
Storing the Machine 13
Maintenance and Care 13
Main Parts 14
Specifications 15
Maintenance and Repairs 15
Trademarks 15
Printing inks contain vegetable oils, paper can be recycled.
Allow only persons who fully understand
the manuals of the MultiEngine and soil
cultivator MultiTool to operate this power
tool combination.
To receive maximum performance and
satisfaction from your STIHL MultiTool, 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 MultiTool. 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 a MultiEngine equipped with a
soil cultivator MultiTool is a power tool
with a relatively fast turning attachment,
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.
{
© ANDREAS STIHL AG & Co. KG, 2011
0458-484-8621. M2-C11.PM.
0000000545_001_GB
BF-MM, BK-MM
1
English
469BA028 KN
+
+
MultiSystem
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.
Guide to Using this Manual
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:
N A 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:
N Loosen the screw (1).
N Lever (2) ...
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols and signal words described
below:
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.
Caution!
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 differ from those
described in this manual, please contact
your STIHL dealer for assistance.
2
BF-MM, BK-MM
English
Safety Precautions and
Working Techniques
Because a MultiEngine
equipped with a soil
cultivator MultiTool is 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.
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 manuals of your
MultiEngine and MultiTool. Be sure that
anyone using it understands the information contained in these manuals.
Warning!
The use of this machine may be hazardous. If a rotating blade comes in contact
with your body, it will injure you. When it
comes in contact with solid foreign
objects such as rocks or bits of metal, it
may fling them directly or by ricochet in
the direction of bystanders or the operator. Striking such objects could damage
the MultiTool and may cause blades to
crack, chip or break. Thrown objects,
including broken blades, may result in
serious or fatal injury to the operator or
bystanders.
STIHL does not recommend the use of
non-elastic blades in stony areas.
Use your MultiEngine equipped with the
soil cultivator MultiTool only for
rejuvenation of flower beds and
plantings, and for mixing soil-improving
additives into the soil.
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.
BF-MM, BK-MM
3
English
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.
Proper Clothing
Warning!
To reduce the risk of injury, the operator
should wear proper protective apparel.
The suitable deflector for your power
tool will not protect the operator from all
foreign objects (stones, glass, wire, etc.)
thrown back by the rotating attachment.
Thrown objects may also ricochet and
strike the operator.
Warning!
To reduce the risk of
injury to your eyes never
operate your power tool
unless wearing goggles
or properly fitted protec-
tive glasses with
adequate top and side protection complying with ANSI Z 87.1 (or your
applicable national standard). 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.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Always wear gloves
when handling the power
tool and the attachment.
Heavy-duty, nonslip
gloves improve your grip
and help to protect your
hands.
Clothing must be sturdy
and snug-fitting, but allow
complete freedom of
movement. Wear long
pants made of heavy
material to help protect
your legs. Do not wear
shorts, sandals or go
barefoot.
Avoid loose-fitting jackets, scarfs,
neckties, jewelry, flared or cuffed pants,
unconfined long hair or anything that
could become caught on branches,
brush or the moving parts of the unit.
Secure hair so it is above shoulder level.
Good footing is very
important. Wear sturdy
boots with nonslip soles.
Steel-toed safety boots
are recommended.
For further instructions on proper
clothing see the safety precautions in
the instruction manual of the
MultiEngine you are using.
THE POWER TOOL (MULTIENGINE
EQUIPPED WITH SOIL CULTIVATOR
MULTITOOL)
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
and expressly approved by STIHL for
use with the specific STIHL power tool
models 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
4
BF-MM, BK-MM
English
469BA001 KN
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
(MULTIENGINE EQUIPPED WITH
SOIL CULTIVATOR MULTITOOL)
Transporting the Power Tool
Warning!
To reduce the risk of injury from loss of
control and MultiTool contact, never
carry or transport your power tool with
the MultiTool moving.
Warning!
Always switch off the engine and make
sure the MultiTool has stopped before
putting a power tool down.
Grip the power tool by the carrying
handle with the attachment facing
forward.
Warning!
When transporting it in a vehicle, properly secure it to prevent turnover, fuel
spillage and damage to the unit.
Before Starting
Warning!
Always check your power tool for proper
condition and operation before starting.
Never attempt to modify the controls or
safety devices.
Warning!
Never operate your power tool if it is
damaged, improperly adjusted or maintained, or not completely or securely
assembled.
Unfold the bike handle into the working
position and secure it with the knob (see
chapter "Adjusting the bicycle handle" of
your MultiEngine instruction manual.)
Keep the handles clean and dry at all
times; it is particularly important to keep
them free of moisture, pitch, oil, fuel mix,
grease or resin in order for you to
maintain a firm grip and properly control
your power tool.
Warning!
To reduce the risk of injury from the
MultiTool rotating in the wrong direction,
check that the position of the gearbox is
correct and change it if necessary.
On metal tools (top illustration), position
the gearbox so that the shaft is below
the drive tube.
Use for:
– BF-MM cultivator blades with
pointed tines
– BK-MM cultivator blades with
curved tines
– FC-MM edger
– RL-MM aerator
– MF-MM dethatcher
Warning!
The MultiTool must be properly tightened and in safe operating condition.
Inspect for loose parts (hitch pins,
screws, etc.) and for cracked, bent,
warped or damaged blades. Replace
damaged blades before using the power
tool.
BF-MM, BK-MM
5
English
469BA027 KN
469BA045 KN
Warning!
Do not attach any MultiTool to a unit
without proper installation of all required
parts. Failure to use the proper parts
may cause the attachments to fly off and
seriously injure the operator or
bystanders.
During Operation
Holding and Controlling the Power
Tool
Warning!
To reduce the risk of injury from thrown
objects and contact with the attachment,
never operate your power tool without a
properly mounted deflector.
Check your MultiTool instruction manual to ensure you are using the
appropriate deflector for the MultiTool
mounted.
Starting
Warning!
Start the engine at least 10 feet (3 m)
from the fueling spot, outdoors only.
For specific starting instructions, see the
appropriate section of your MultiEngine
and MultiTool manuals.
Place the power tool on firm ground or
other solid surface in an open area.
Maintain good balance and secure
footing.
Warning!
Always stand to one side of the unit to
avoid the risk of injury from contact with
the rotating MultiTool.
Warning!
To reduce the risk of injury from loss of
control, be absolutely sure that the
MultiTool is clear of you and all other
obstructions and objects, including the
ground, because when the engine starts
at starting-throttle, engine speed will be
fast enough for the clutch to engage and
move the MultiTool.
Once the engine has started,
immediately blip the throttle trigger,
which should release the starting throttle
and allow the engine to slow down to
idle.
Warning!
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when
starting.
See also the safety precautions on
Starting in the instruction manual of the
MultiEngine.
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!
Never attempt to operate your power tool with
one hand. Loss of control of the power tool
may result in serious or
fatal injury. To reduce
the risk of injury, keep hands and feet
away from the MultiTool. Never touch a
moving MultiTool with your hand or any
other part of your body.
6
BF-MM, BK-MM
English
Warning!
Do not overreach. Keep proper footing
and balance at all times. Special care
must be taken in slippery conditions
(wet ground, snow) and in difficult, overgrown terrain. Watch for hidden
obstacles such as tree stumps, roots
and ditches to avoid stumbling. For better footing, clear away scrub and
cuttings. Be extremely cautious when
working on slopes or uneven ground.
Operate the power tool only at a normal
walking pace.
Warning!
To avoid the risk of injury from contact
with the rotating attachment, be
extremely cautious when pulling the
power tool toward you.
Be extremely cautious when changing
direction with the power tool – especially
on slopes.
Warning!
To avoid the risk of injury from loss of
control, never work on steep slopes.
Working Conditions
Start and operate your power tool only
outdoors in a well-ventilated area.
Operate it under good visibility and
daylight conditions only. Work carefully.
Warning!
If the soil being worked on or the surrounding ground is coated with a
chemical substance (such as an active
pesticide or herbicide), read and follow
the instructions and warnings that
accompany the substance at issue.
Warning!
Inhalation of certain
dusts, especially organic
dusts such as mold or
pollen, can cause susceptible persons to have
an allergic or asthmatic
reaction. 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.
Danger!
Your power tool is not
insulated against electric
shock. To reduce the risk
of electrocution, ensure
that there are no power
cables near the surface
or in the working area that could come
into contact with the MultiTool. Damaging such cables with the tool can cause
electric shocks with serious or fatal
consequences.
Information on the routing of cables can
be obtained from public utilities and such
service providers as "Miss Utility" or
"One Call."
Warning!
Use the power tool at ground level only.
The risk of injury is increased if you use
MultiTools above ground level because
they are more exposed and the power
tool is more difficult to control.
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 – move the slide
control / stop switch to 0 or STOP.
BF-MM, BK-MM
Warning!
The MultiTool continues to rotate for a
short period after the throttle trigger is
released (flywheel effect).
7
English
5m (16ft)
If the MultiTool or deflector becomes
clogged or stuck, always switch off the
engine and make sure the attachment
has stopped before cleaning. Grass,
weeds, etc. should be cleaned off the
attachment as necessary.
To reduce the risk of eye and other injury
ensure that bystanders are at least
16 feet (5 m) away. Bystanders should
be encouraged to wear eye protection.
To reduce the risk of damage to
property, also maintain this distance
from such objects as vehicles or
windows.
Stop the engine immediately if you are
approached.
Warning!
Before you start work, examine the area
for stones, glass, pieces of metal, rubbish or other solid objects. Such objects
could be hurled by the cutting tool and
directly or indirectly strike the operator
or bystanders. Such objects may also
damage the MultiTool. The blade may
shatter, splinter or break. Flying objects
or damaged blades may cause serious
or fatal injury to the operator and
bystanders.
Warning!
Never divert discharge of material
toward bystanders nor allow anyone
near the area of operation. Use care in
directing discharge to avoid damage to
surfaces, automobiles, and the like.
Warning!
Avoid cutting close to fences, sides of
buildings, tree trunks, stones or similar
obstacles which could damage the
blade or lead to loss of control of the
unit. Be aware of a higher risk of ricochets in such conditions. Flying objects
or damaged blades may cause serious
or fatal injuries to the operator and
bystanders. Avoid the roots of trees!
Large roots may jam the blades and
damage the machine. The tree may also
be damaged if its roots are severed.
If the machine strikes a buried object
(such as a stone), stop the engine and
remove the obstacle. Examine the
machine for signs of damage before
continuing.
Warning!
Check the tightness and condition of the
MultiTool at regular intervals during cutting. If the behaviour of the tool
changes, stop the engine immediately
and examine the tool. Replace a
cracked, bent, warped or damaged
blade immediately, even if damage is
limited to superficial cracks. Such
attachments may shatter at high speed
and cause serious or fatal injury.
Warning!
The gearbox becomes hot during operation. To reduce the risk of burn injury,
do not touch the gear housing when it is
hot.
MAINTENANCE, REPAIR AND
STORING
Warning!
Always stop the engine and make sure
that the attachment 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
MultiTool instruction manuals. Have
such work performed at your STIHL
servicing dealer only.
Warning!
Use only identical STIHL replacement
parts for maintenance and repair. Use of
non-STIHL parts may cause serious or
fatal injury.
Wear gloves when handling or
performing maintenance on blades.
Warning!
Never repair damaged attachments by
welding, straightening or modifying the
shape. This may cause parts of the
attachment to come off and result in
serious or fatal injuries.
Tighten all nuts, bolts and screws,
except the carburetor adjustment
screws, after each use.
8
BF-MM, BK-MM
English
469BA015 KN
469BA017 KN
469BA018 KN
469BA016 KN
2
1
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.
Using the Unit
General
Cultivator MultiTools are available in
versions with pick tines (BF-MM) and
bolo tines (BK-MM).
Bolo tines
Not available in all markets.
Bolo tines are particularly suitable for
working cultivated, lighter soils.
Preparations
N Secure the handlebar in the normal
operating position.
N Start the engine.
Working Technique
BF-MM, BK-MM
Pick tines
The MultiEngine with rotor blades can
be operated forwards (1) or
backwards (2).
Choose the method and type of rotor
blade to suit your purpose, i.e. this
Pick tines are particularly suitable for
tilling and loosening hard or packed soil.
depends on the shape and size of the
area and soil conditions.
9
English
469BA019 KN
469BA020 KN
469BA003 KN
Working in an alternating backwards
and forwards motion is particularly
suitable for loosening packed soil.
Working in a steady backwards or
forwards motion is particularly suitable
for working loose soil.
The rotor blades may only be mounted
and operated in one position. Arrows on
the blades show the required direction of
rotation – see chapter on "Mounting the
MultiTool".
Typical Applications
N Breaking up soil
A few preparations are necessary before
you begin to break up soil which has
been previously tilled (e.g. last year's
vegetable or flower garden). First clear
away surface weeds and remains of
other plants as well as hard objects like
rocks, stones, bottles, pieces of wood
etc.
Hold the cultivator firmly with both hands
and till only a small area at a time to the
required depth.
Finish tilling the area by guiding the
cultivator in such a way that you leave
no footprints. Use a rake to level off the
entire area.
N Loosening soil around plants
Only loosen the surface soil around
plants. Avoid going too deep as this
could damage the shallow roots of some
plants.
To avoid any damage to the cultivator or
trees, be wary not to catch the blades on
the large roots of trees.
N Working in soil improvers
The cultivator can be used for mulching
with loam, compost, leaves, other
organic material or fertilizers.
Prepare the area by removing all old
roots, the remains of large plants and
hard objects (stones etc.). Spread the
mulch evenly on the ground.
Work in the mulch with a back and forth
motion.
Finish off by leveling the area with a
rake.
N Trenching or furrowing
Walk slowly backward and pull the
cultivator to create the furrow required.
Repeat as necessary to obtain deeper
furrows.
Cleaning the rotor blades
Parts of plants, e.g. roots, can become
tightly wrapped around or between the
rotor blades during operation. To clean
the rotor blades:
– Wear gloves.
– Pull the hitch pins out of the axle.
– Pull the rotor blades off the shaft.
– Remove roots, plants and soil.
Refer to "Mounting the MultiTool" for
mounting instructions.
Cultivator spur (special accessory)
The cultivator spur simplifies control and
makes operation of the power tool less
tiring. It slows the forward motion and
reduces the effort required to hold the
power tool.
The spur breaks up the ridge between
the rotor blades when tilling hard soil.
N Use the screw and knob to mount
the cultivator spur to the right-hand
side of the flange.
N Set the spur to the required depth
and tighten it down firmly.
10
BF-MM, BK-MM
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