Stihl MF-MM User manual

STIHL MF-MM Instruction Manual

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2021 0458-483-0121-A. VA0.H21. 0000000633_012_GB
MF-MM
English
1
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
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 trouble-free 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
Using the Unit 6
Approved MultiEngines 7
Mounting the MultiTool 7
Mounting the Deflector 8
Starting / Stopping the Engine 9
Replacing Spring Tines 10
Storing the Machine 10
Maintenance and Care 10
Minimize Wear and Avoid Damage 11
Main Parts 12
Specifications 13
Maintenance and Repairs 13
Disposal 13

MF-MM
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.
Lend or rent your power tool only to
persons who are familiar with this model
and its operation – do not lend or rent
your power tool without the MultiEngine
and MultiTool user manuals.
Use the dethatcher only for removing
old, dried cuttings, moss, grass or root
residue from lawns.
The machine must not be used for any
other purposes – risk of accidents!
Only use attachments and accessories
that are explicitly approved for this
power tool model by STIHL or are
technically identical. If you have any
questions in this respect, consult your
dealer.
MultiSystem
469BA028 KN
+
+
Guide to Using this Manual Safety Precautions and
Working Techniques
Some special safety pre-
cautions must be
observed to reduce the
risk of personal injury
when operating the
dethatcher because of
the high speed of its
rotating tines.
Always read and and
make sure you under-
stand both user manuals
(MultiEngine and
MultiTool) before using
your power tool for the
first time, and keep them
in a safe place for future
reference. Non-compli-
ance with the user
manuals may cause seri-
ous or even fatal injury.

MF-MM
English
3
Use only high-quality parts and
accessories. in order to avoid the risk of
accidents and damage to the machine.
STIHL recommends the use of genuine
STIHL replacement parts. They are
specifically designed to match the
product and meet your performance
requirements.
The deflector on this power tool cannot
protect the operator from all objects
thrown by the attachment (stones, glass,
wire, etc.). Ejected objects may also
ricochet and strike the operator.
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 high-pressure washer to
clean the power tool. The solid jet of
water may damage parts of the unit.
Clothing and equipment
Wear proper protective clothing and
equipment.
Do not wear clothing which could
become trapped in wood, brush or
moving parts of the machine. Do not
wear a scarf, necktie or jewelry. Tie up
and confine long hair above your
shoulders.
WARNING
Wear "personal" sound protection, e.g.
ear defenders.
STIHL can supply a comprehensive
range of personal protective equipment.
Transporting the machine
Always stop the engine.
Carry your power tool by the handle,
attachment in front of you.
Do not touch hot parts of the machine -
risk of burn injury!
By vehicle: When transporting in a
vehicle, properly secure your machine to
prevent tipping over, damage and fuel
spillage.
The power tool may be dragged
backwards (opposite to the normal
direction of operation) for short
distances. Never attempt to move it
around by pushing it forward as this
could result in damage. The spring tines
might break.
Before starting
Check that your power tool is properly
assembled and in good condition – refer
to the appropriate chapters in the
MultiEngine and MultiTool user
manuals.
–Attachment correctly and securely
mounted and in good condition
(clean, moves freely, not warped)
–Mount both deflector extensions
and mud flap.
–Inspect the deflectors for damage
and wear. Do not use the machine
with a damaged deflector – replace
damaged parts
–Never attempt to modify the controls
or safety devices.
Clothing must be robust
but allow complete free-
dom of movement. Wear
close-fitting clothes such
as a boiler suit, not a
loose jacket.
Wear sturdy shoes with
non-slip soles.
To reduce the risk of eye
injuries, wear close-fit-
ting safety glasses in
accordance with Euro-
pean Standard EN 166.
Make sure the safety
glasses are a snug fit.
Wear sturdy protective
gloves made of a resist-
ant material (e. g.
leather).
469BA001 KN

MF-MM
English
4
–Keep the handles dry and clean –
free from oil and dirt – this is
important for safe control of the
machine
–Swing the bike handle to the normal
operating position and tighten it
down firmly with the rotary knob.
See chapter on "Adjusting the Bike
Handle" in the MultiEngine user
manual.
To reduce the risk of personal injury, do
not operate your power tool if it is
damaged or not properly assembled!
Check the gearbox for correct position,
adjust if necessary. This helps reduce
the risk of injury from the MultiTool
rotating in the wrong direction.
See also notes on "Mounting the
MultiTool".
If you use metal tools, position the
gearbox so that the axle is below the
drive shaft.
Use this position for:
–BF-MM cultivator
–BK-MM bolo tines
–FC-MM edger
–RL-MM aerator
–MF-MM dethatcher
Holding and guiding the machine
Make sure you always have a firm and
secure footing.
Always hold the unit firmly with both
hands on the handles.
Right hand on control handle, left hand
on grip on handlebar.
While working
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the slide control
/ stop switch/button to 0or STOP.
To reduce the risk of injury from contact
with the tool and ejected objects, do not
allow any other persons within a radius
of 5 meters of your own position.This
distance must also be maintained in
relation to objects (vehicles, window
panes) – risk of property damage!
The correct engine idle speed is
important to ensure that the attachment
stops moving when you let go of the
throttle trigger. Check and correct the
idle speed setting at regular intervals. If
the attachment still rotates when the
engine is idling, have your dealer check
your machine and make proper
adjustments or repairs – see
MultiEngine user manual.
To reduce the risk of injury from thrown
objects or contact with the attachment,
never operate the unit without a properly
mounted deflector designed specifically
for the unit and the attachment.
Always stand behind the deflector or to
one side of the machine during
operation – never in front of the
attachment.
Do not push attachments into the
ground.
Take special care in slippery conditions
– wet or icy, on slopes or uneven ground
etc.
To reduce the risk of accidents or injury,
remove all obstacles and objects from
the work area.
Inspect the work area – solid objects
(stones, pieces of metal, etc.) may
damage the attachment.
469BA045 KN
5m (16ft)
The gear head becomes
hot during operation. To
reduce the risk of burn
injury, do not touch the
gear housing!

MF-MM
English
5
Operate your power tool at normal
walking pace only.
Be extremely cautious when pulling the
power tool towards you because of the
risk of injury from contact with the
rotating attachment.
Make sure you always have a firm and
secure footing.
Be extremely cautious when changing
direction with the power tool – especially
on slopes.
On slopes, always work parallel to the
gradient to reduce the risk of injury from
slipping or contact with the attachment.
Never work on steep slopes because of
the risk of injury through loss of control
of the power tool.
Take particular care when working close
to fences, walls, stones, roots, trees and
areas of dense growth. Solid objects
could be thrown in your direction or may
damage the attachment – risk of
accident!
When working next to high scrub,
bushes and hedges, avoid harming
animals!
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
Take breaks when you start getting tired
or feeling fatigue – risk of accidents!
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Proceed with caution, do not put
others in danger.
If your power 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 – see also
"Before Starting". Make sure the safety
devices are working properly. Never use
a power tool that is no longer safe to
operate. In case of doubt, contact a
dealer.
Do not touch the attachment while the
engine is running. If the attachment
becomes jammed by an obstruction,
switch off the engine immediately before
attempting to remove the obstruction –
otherwise, risk of injury!
Opening the throttle while the
attachment is blocked increases the
load and reduces engine speed. This
causes the clutch to then slip
continuously which leads to overheating
and damage to important components
(e.g. clutch, polymer housing
components) – and this can increase the
risk of injury from the attachment moving
while the engine is idling.
Check the attachment at frequent
regular intervals during operation or
immediately if there is a noticeable
change in behavior:
–Shut off the engine, hold the
machine securely.
–Check condition and tightness, look
for broken spring tines.
–Replace damaged spring tines
immediately.
Clean the attachment and deflector at
regular intervals during operation.
–Shut off the engine
–Use gloves
–Remove grass, weeds and scrub,
etc.
To reduce the risk of injury, shut off the
engine before changing attachments.
Never continue using or attempt to
repair damaged or cracked spring tines.
After finishing work
After finishing work or before leaving the
power tool unattended: Shut off the
engine.
After finishing work, clean dirt, soil and
plant residue off the attachment – wear
gloves to reduce the risk of injury.
Do not use any grease solvents when
cleaning.
After thoroughly cleaning, coat metal
surface of attachments with a corrosion
inhibitor.
To avoid the risk of elec-
trocution, never use your
power tool in areas where
electrical lines are laid on
the surface or buried just
below the surface.Strik-
ing and damaging such
lines with the attachment
could cause serious or
even fatal injury.

MF-MM
English
6
Maintenance and Repairs
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the MultiTool and
MultiEngine instruction manuals. 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 power tool. 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.
The MF-MM dethatcher MultiTool is
designed to remove old, dried cuttings,
moss, grass or root residue from lawns.
Preparations
If the lawn is very dry, spray it with water
before you start work: this softens the
soil a little and reduces the amount of
dust created.
If the grass is longer than about 5 cm,
mow it before using the dethatcher.
WARNING
Clear away all obstacles and solid
objects from the work area.
NPlan the route to be taken.
Operate the MultiEngine with MF-MM
dethatcher in the forward direction only.
The attachments may only be rotate in
one direction. Arrows on the flanges
show the correct direction of rotation –
see chapter on "Mounting the MultiTool".
WARNING
Never work without the deflector, both
deflector extensions and the mud flap.
These devices divert loosened and cut
material away from the machine and the
operator.
Using the Unit
483BA001 KN
483BA002 KN
483BA003 KN

MF-MM
English
7
Operation
NSecure the handlebar in the normal
operating position.
NStart the engine.
NWork with the engine running at full
throttle.
NWalk at a pace that achieves the
required result without lugging down
the engine.
NOperate at no more than a normal
walking pace.
Cleaning the Dethatcher
Parts of plants, such as grass or roots,
may become tightly wound around the
tool mounting and the attachment itself.
Clean the attachment as follows:
–Shut off the engine.
–Wear work gloves.
–Remove the inner hitch pins from
the shaft.
–Pull the dethatcher off the shaft.
–Remove the outer hitch pin (wheel)
from the shaft.
–Pull off the wheel.
–Remove pieces of roots, plants and
soil.
Refer to "Mounting the MultiTool" for
mounting instructions.
Only use MultiEngines supplied by
STIHL or expressly approved by STIHL
for use with the MultiTool.
This MultiTool may only be used in
combination with the STIHL MM 56
MultiEngine.
Removing Existing MultiTools
WARNING
Wear gloves to reduce the risk of injury
from contact with sharp MultiTools
and/or hot surface of gearbox.
NRemove the hitch pins and pull the
MultiTools (if fitted) off the axle –
see also "Mounting the MultiTool" in
the instruction manual of the other
MultiTool.
NClean the gearbox if necessary.
Checking Position of Gearbox
WARNING
To reduce risk of injury from the
MultiTool rotating in the wrong direction,
check that position of gearbox is correct
and adjust if necessary.
Approved MultiEngines Mounting the MultiTool
481BA008 KN

MF-MM
English
8
The axle (1) must be below the shaft (2).
Direction of rotation (3) of MultiTool.
Adjusting Position of Gearbox
NLoosen clamp screws on gearbox.
NTurn the gearbox through 180°.
NLine up the gearbox in the correct
position.
NTighten down the two clamp screws
on the gearbox in the following
sequence:
–Tighten the first screw moderately.
–Tighten the second screw
moderately.
–Tighten down first screw firmly.
–Tighten down second screw firmly.
NOTICE
It must not be possible to rotate the
gearbox on the drive tube.
Mounting the MultiTool
Left-hand and right-hand dethatchers
are different. The direction of rotation is
marked with arrows on the gearbox and
flange. Make sure the arrows point in the
same direction.
NOTICE
The spring tines may break or be
damaged if the direction of rotation is
wrong.
NRotate the left-hand dethatcher (4)
on the shaft until it can be pushed
into position – check the direction of
rotation again (arrows).
NInsert hitch pin (5) in hole in shaft
and snap it into position.
NMount the right-hand dethatcher in
the same way.
Mounting and Removing the Deflector
Extensions
Mounting
NSlide both deflector extensions onto
the right and left sides of the
deflector, push them fully home at
the top and bottom and engage the
tab (1).
Removing
NUse the combination wrench to
disengage the tabs (1) and then pull
off the extensions.
WARNING
The deflector extensions divert removed
material and debris away from the
machine and the operator. Never work
without a properly mounted deflector
extensions.
2
469BA043 KN
1
3
481BA011 KN
4
483BA004 KN
5
Mounting the Deflector
11
483BA007 KN

MF-MM
English
9
Installing and Removing the Mud Flap
NSecure the mud flap (1) with
screw (2) and rotary knob (3) to the
right-hand side of the flange.
NAdjust the mud flap to the required
length so that it overlaps the
deflector.
NTighten down the rotary knob firmly.
WARNING
The mud flap diverts removed material
and debris away from the machine and
the operator. Never work without a
properly mounted mud flap.
Starting the Engine
Always follow the starting procedure
described in the MultiEngine instruction
manual.
NSecure the handlebar in the normal
operating position.
NRetract the wheels, if fitted – see
chapter on "Wheels" in MultiEngine
instruction manual.
NRetract the spur, if fitted.
NCheck that the MultiTool is not
touching the ground or any other
obstacles. The unit must rest on the
engine flange and the support on
the frame.
NMake sure you have good balance
and secure footing – as shown in the
illustration.
WARNING
To reduce the risk of injury from contact
with the rotating attachment, always
stand to the side of the power tool, never
in front of the attachment.
NWith your left hand on the loop
handle, press the unit firmly against
the ground – do not touch the
throttle trigger or lockout lever.
NOTICE
Do not stand or kneel on the handlebar
or frame.
WARNING
The attachment may begin to move as
soon as the engine starts. For this
reason, blip the throttle after starting –
the engine returns to idling speed.
Now follow the starting procedure
described in the MultiEngine instruction
manual.
Stopping the Engine
NSee MultiEngine instruction manual.
3
483BA011 KN
2
Starting / Stopping the
Engine
469BA061 AS
469BA062 AS

MF-MM
English
10
Replace individual spring tines if they
are severely damaged or broken.
NRemove the dethatcher – see
"Mounting the MultiTool".
NLoosen the screws (1) on the
dethatcher.
NRemove the flange (2).
Spring tines and washers are fitted
alternately on the tubes.
NPull off the spring tines (3) and
washers.
NReplace damaged spring tines.
NFit spring tines and washers on the
tubes until they are full.
NFit the flange (2).
NTighten down the screws (1) firmly.
NMount the dethatcher – see
"Mounting the MultiTool".
For periods of about 30 days or longer
NRemove, clean and inspect the
dethatcher with deflector extensions
and mud flap.
NStore the tool in a dry and secure
location. Keep out of the reach of
children and other unauthorized
persons
The following intervals apply to normal
operating conditions only. If your daily
working time is longer or operating
conditions are difficult (very dusty work
area, etc.), shorten the specified
intervals accordingly.
All accessible screws and nuts
NRetighten if necessary
Sweeping attachments and deflectors
NVisual inspection, check tightness
before starting work and after every
refueling stop
NReplace if damaged
Safety labels
NReplace illegible safety labels
Replacing Spring Tines
483BA006 KN
1
2
31
Storing the Machine Maintenance and Care

MF-MM
English
11
Observing the instructions in this manual
and the MultiEngine manual helps
reduce the risk of unnecessary wear and
damage to the power tool.
The power tool must be operated,
maintained and stored with the due care
and attention described in these
instruction manuals.
The user is responsible for all damage
caused by non-observance of the safety
precautions, operating and maintenance
instructions. This includes in particular:
–Alterations or modifications to the
product not approved by STIHL.
–Using tools or accessories which
are neither approved or suitable for
the product or are of a poor quality.
–Using the product for purposes for
which it was not designed.
–Using the product for sports or
competitive events.
–Consequential damage caused by
continuing to use the product with
defective components.
Maintenance Work
All the operations described in the
chapter on "Maintenance and Care"
must be performed on a regular basis. If
these maintenance operations cannot
be performed by the owner, they should
be 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.
If these maintenance operations are not
carried out as specified, the user
assumes responsibility for any damage
that may occur. Among other parts, this
includes:
–Corrosion and other consequential
damage resulting from improper
storage.
–Damage to the product resulting
from the use of poor quality
replacement parts.
Parts Subject to Wear and Tear
Some parts of the power tool are subject
to normal wear and tear even during
regular operation in accordance with
instructions and, depending on the type
and duration of use, have to be replaced
in good time. Among other parts, this
includes:
–Spring tines
–Mounting hardware for spring tines
–Deflector extensions
–Mud flap
Minimize Wear and Avoid
Damage

MF-MM
English
12
1Right-hand wheel
2Left-hand wheel
3Inner hitch pin, left
4Deflector extension, right
5Defflector extension, left
6Mud flap
7Outer hitch pin, left
8Spring tines
Main Parts
1
483BA010 KN
8326
5
4
7

MF-MM
English
13
Attachment
Weight
REACH
REACH is an EC regulation and stands
for the Registration, Evaluation,
Authorisation and Restriction of
Chemical substances.
For information on compliance with the
REACH regulation (EC) No. 1907/2006
see www.stihl.com/reach.
Users of this machine may only carry out
the maintenance and service work
described in this user manual. All other
repairs must be carried out 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.
When repairing the machine, only use
replacement parts which have been
approved by STIHL for this power tool or
are technically identical. Only use high-
quality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
STIHL recommends the use of original
STIHL replacement parts.
Original STIHL parts can be identified by
the STIHL part number, the {
logo and the STIHL parts symbol K
(the symbol may appear alone on small
parts).
Observe all country-specific waste
disposal rules and regulations.
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environment-
friendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
Specifications
Dethatcher, left, right
Working width: 500 mm
Dethatcher with deflec-
tor extensions and mud
flap 8.6 kg
Maintenance and Repairs Disposal
000BA073 KN

www.stihl.com *04584830121A*
0458-483-0121-A
0458-483-0121-A
englisch
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