Stihl KM 85, KM 85 R, KM 55 Instruction Manual
Instruction Manual
Notice d’emploi
STIH)
STIHL KM 85
BA_KM85_82_U_L4.book Seite 0 Donnerstag, 28. Oktober 2004 8:13 08
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1KM 85, KM 85 R
English
BA_SE_111_006_01_06.fmPrinted on chlorine-free paper.
Printing inks contain vegetable oils; paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2006
0458 462 8221. M0,5. K6. CP. Printed in USA
STIHl
Contents
KombiSystem ................................... 2
Guide to Using this Manual .............. 2
Safety Precautions and
Working Techniques ......................... 3
Approved KombiTools .................... 11
Mounting the Bike Handle .............. 11
Adjusting the Throttle Cable ........... 13
Mounting the Loop Handle ............. 13
Fuel ................................................ 15
Fueling ............................................ 16
Starting / Stopping the Engine ........ 16
Operating Instructions .................... 19
Cleaning the Air Filter ..................... 20
Spark Arresting Screen
in Muffler ......................................... 20
Motor Management ........................ 21
Adjusting the Carburetor ................ 21
Checking the Spark Plug ................ 23
Replacing the Starter Rope
and Rewind Spring ......................... 24
Storing the Machine ........................ 26
Maintenance Chart ......................... 27
Main Parts and Controls ................. 28
Specifications ................................. 30
Special Accessories ....................... 31
Maintenance and Repairs ............... 31
STIHL Limited Emission Control
Warranty Statement ........................ 32
Allow only persons who understand the
manuals of the KombiEngine and the
KombiTool to operate your power tool.
To receive maximum performance and
satisfaction from your STIHL power tool,
it is important that you read and
understand the maintenance and safety
precautions, starting on page 3, before
using your power tool.
Contact your STIHL dealer or the STIHL
distributor for your area if you do not
understand any of the instructions in the
two manuals.
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2
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KM 85, KM 85 R
!Warning!
Because this power tool is a high-speed
working 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.
STIHL's philosophy is to continually
improve all of its products. As a result,
engineering changes and improve-
ments are made from time to time.
Therefore, STIHL cannot be responsible
for changes, modifications or
improvements not covered in this
manual. If the operating characteristics
or the appearance of your power tool
differs from those described in the two
manuals, please contact your STIHL
dealer for information and assistance.
In the STIHL KombiSystem a number of
different KombiEngines and KombiTools
can be combined to produce a power
tool. In this instruction manual the
functional unit formed by the
KombiEngine and KombiTool is referred
to as the power tool.
The KombiEngine and KombiTool come
with separate instruction manuals.
Always read and make sure you
understand both instruction manuals
before starting and using your machine.
Keep the manuals in a safe place for
later reference.
Pictograms
All the pictograms attached to the
machine are shown and explained in
this manual.
The operating and handling instructions
are supported by illustrations.
Symbols in text
The individual steps or procedures
described in the manual may be marked
in different ways:
: A bullet marks a step or procedure
without direct reference to an
illustration.
A description of a step or procedure that
refers directly to an illustration may
contain item numbers that appear in the
illustration.
Example:
Loosen the screw (1)
Lever (2) ...
KombiSystem
.
.
.
.
002BA159 KN
+
+
Guide to Using this Manual
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3KM 85, KM 85 R
English
In addition to the operating instructions,
this manual may contain paragraphs
that require your special attention. Such
paragraphs are marked with the
symbols described below:
Warning where there is a risk of an
accident or personal injury or
serious damage to property.
Caution where there is a risk of
damaging the machine or its
individual components.
Note or hint which is not essential
for using the machine, but may
improve the operator’s under-
standing of the situation and result
in better use of the machine.
Note or hint on correct procedure in
order to avoid damage to the
environment.
Equipment and features
This instruction manual may refer to
several models with different
features. Components that are not
installed on all models and related
applications are marked with an
asterisk (*). Such components may
be available as special accessories
from your STIHL dealer.
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. If the
operating characteristics or the
appearance of your machine differ from
those described in this manual, please
contact your STIHL dealer for
assistance.
Therefore some changes, modifications
and improvements may not be covered
in this manual.
Because this
KombiEngine 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
KombiEngine and KombiTool
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. Be sure
that anyone using it understands the
information contained in these manuals.
Safety Precautions and
Working Techniques
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KM 85, KM 85 R
!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
KombiEngine and KombiTool instruction
manuals for a description of the controls
and the function of the parts of your
model.
Safe use of a KombiEngine 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 white-
finger 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:
– Most STIHL power tools are
available with an anti-vibration
(“AV”) system designed to reduce
the transmission of vibrations
created by the engine to the
operator's hands. An AV system is
recommended for those persons
using power tools on a regular or
sustained basis.
– Wear gloves and keep your hands
warm.
– Keep the AV system well
maintained. A power tool with loose
components or with damaged or
worn AV buffers 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.
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5KM 85, KM 85 R
English
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!
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.
For further instructions on proper
clothing see the safety precautions in
the instruction manual of the KombiTool
you are using.
THE POWER TOOL
For illustrations and definitions of the
power tool parts see the chapter on
“Main Parts and Controls.”
!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 KombiEngine
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.
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KM 85, KM 85 R
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.
Fuel
Your STIHL power tool uses an oil-
gasoline mixture for fuel (see the chap-
ter on “Fuel” of your instruction manual).
!Warning!
Gasoline is an extremely
flammable fuel. If spilled
and ignited by a spark or
other ignition source, it
can cause fire and serious
burn injury or property
damage. Use extreme caution when
handling gasoline or fuel mix.
Do not smoke or bring any fire or flame
near the fuel or the power tool. Note that
combustible fuel vapor may escape from
the fuel system.
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!
Check for fuel leakage while refueling
and during operation. If fuel leakage is
found, do not start or run the engine until
the leak is fixed and any spilled fuel has
been wiped away. Take care not to get
fuel on your clothing. If this happens,
change your clothing immediately.
Different models may be equipped with
different fuel caps.
Cap with grip
!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.
To do this with this STIHL
cap, raise the grip on the
top of the cap until it is
upright at a 90° angle.
Insert the cap in the fuel
tank opening with the
triangular marks on the grip of the cap
and on the fuel tank opening lining up.
Using the grip, turn the cap firmly
clockwise as far as it will go (approx. a
quarter turn).
Fold the grip flush with the
top of the cap. If the grip
does not lie completely
flush with the cap and the
detent on the grip does
not fit in the
corresponding recess in the filler neck,
the cap is not properly seated and
tightened and you must repeat the
above steps.
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7KM 85, KM 85 R
English
Screw cap
!Warning!
Unit vibrations can cause
an improperly tightened
fuel filler cap to loosen or
come off and spill
quantities of fuel. In order
to reduce the risk of fuel
spillage and fire, tighten the fuel filler cap
by hand as securely as possible.
Before Starting
!Warning!
Always check your KombiEngine for
proper condition and operation before
starting, particularly the throttle trigger,
throttle trigger interlock, stop switch and
working tool. The throttle trigger (if
applicable) must move freely and always
spring back to the idle position. Never
attempt to modify the controls or safety
devices.
!Warning!
Never use a power tool that is damaged
or not properly maintained.
!Warning!
Check that the spark plug boot is
securely mounted on the spark plug – a
loose boot may cause arcing that could
ignite combustible fumes and cause a
fire.
Keep the handles clean and dry at all
times; it is particularly important to keep
them free of moisture, pitch, oil, grease
or resin in order for you to maintain a firm
grip and properly control your power
tool.
Starting
Start the engine at least 10 feet
(3 meters) from the fueling spot,
outdoors only.
For specific starting instructions, see the
appropriate section of your
KombiEngine and KombiTool manuals.
Place the power tool on firm ground or
other solid surface in an open area.
Maintain good balance and secure
footing.
!Warning!
To reduce the risk of injury from loss of
control, be absolutely sure that the
working tool 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 working tool.
!Warning!
Your power tool is a one-person
machine. Do not allow other persons in
the general work area, even when
starting.
!Warning!
To reduce the risk of injury from loss of
control, do not attempt to “drop start”
your power tool.
!Warning!
When you pull the starter grip, do not
wrap the starter rope around your hand.
Do not let the grip snap back, but guide
the starter rope to rewind it properly.
Failure to follow this procedure may
result in injury to your hand or fingers
and may damage the starter
mechanism.
See also the safety precautions on
Starting in the instruction manual of the
KombiTool.
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KM 85, KM 85 R
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.
Your right hand should grip the rear
handle. This also applies to left-handers.
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!
As soon as the engine is
running, this product
generates toxic exhaust
fumes containing
chemicals (such as
unburned hydrocarbons
and carbon monoxide) known to cause
respiratory problems, cancer, birth
defects, or other reproductive harm.
Some of the gases (e.g. carbon
monoxide) may be colorless and
odorless. To reduce the risk of serious or
fatal injury/illness from inhaling toxic
fumes, never run the machine indoors or
in poorly ventilated locations.
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.
!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.
!Warning!
To reduce the risk of fire and burn injury,
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 (e.g. the trunk of a felled tree)
away from any combustible substances.
!Warning!
Never modify your muffler. The muffler
could be damaged and cause an
increase in heat radiation or sparks,
thereby increasing the risk of fire and
burn injury. You may also permanently
damage the engine. Have your muffler
serviced and repaired by your STIHL
servicing dealer only.
002BA057 KN
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9KM 85, KM 85 R
English
Catalytic converter
!Warning!
Some STIHL power tools
are equipped with a
catalytic converter, which
is designed to reduce the
exhaust emissions of the
engine by a chemical
process in the muffler. Due to this
process, the muffler does not cool down
as rapidly as conventional mufflers when
the engine returns to idle or is shut off.
To reduce the risk of fire and burn
injuries, the following specific safety
precautions must be observed.
!Warning!
Since a muffler with a catalytic converter
cools down less rapidly than conven-
tional mufflers, always set your power
tool down in the upright position and
never locate it where the muffler is near
dry brush, grass, wood chips or other
combustible materials while it is still hot.
!Warning!
An improperly mounted or damaged
cylinder housing or a damaged/
deformed muffler shell may interfere
with the cooling process of the catalytic
converter. 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 catalytic converter is furnished with
screens designed to reduce the risk of
fire from the emission of hot particles.
Due to the heat from the catalytic
reaction, these screens will normally
stay clean 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.
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 KombiEngine and
KombiTool instruction manuals. Please
refer to the maintenance charts
respectively the maintenance notes in
these manuals.
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10
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KM 85, KM 85 R
!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 KombiEngine and
KombiTool instruction manuals. Have
such work performed by your STIHL
servicing dealer only.
!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 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.
If your muffler was equipped with a
spark-arresting screen to reduce the risk
of fire, never operate your power tool if
the screen is missing or damaged.
Remember that the risk of forest fires is
greater in hot or dry weather.
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 this
manual.
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English
The following STIHL KombiTools may be
mounted on the KombiEngine
1)
Barrier bar must be mounted on
loop handle
2)
Unsuitable or not approved for
KombiEngines with bike handle
Mounting the Handlebar
: Mount the handlebar (1) on the drive
tube (2) about 40 cm (A) forward of
the engine.
: Place the clamp (3) and the handle
support (4) on the drive tube.
: Position the handlebar (1) on the
handle support – the rubber grip
must be on the left (viewed from the
engine)
Approved KombiTools
KombiTool Purpose
FS-KM Brushcutter with
mowing head
FS-KM
1)
Brushcutter with
grass cutting blade
HL-KM 0/90°
1) 2)
Hedge trimmer,
adjustable
HL-KM 135°
1) 2)
Hedge trimmer,
adjustable
HL-KM 0°
2)
Hedge trimmer
FH-KM
1)
Power scythe
HT-KM
2)
Pole pruner
BF-KM
1)
Pick tine cultivator
FCB-KM
2)
FCS-KM
2)
Power edger
KB-KM
2)
Bristle brush
KW-KM
2)
PowerSweep
Mounting the Bike Handle
1
3
4
5
6
A
6
2
002BA128 KN
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English
KM 85, KM 85 R
: Place the clamp (5) on the handle
support.
: Insert screws (6) in the holes and
clamp (3) and tighten them
moderately.
: Line up the bike handle.
: Tighten down the screws firmly.
Mounting the Control Handle
: Release the screw (7) and remove
it with the washer (8). The nut (9)
remains in the control handle (10).
: Push the control handle onto the
handlebar (1) – the throttle trigger
(11) must point towards the
gearhead.
: Line up the holes (12).
: Fit screw and washer in control
handle and tighten down firmly.
Fitting the Throttle Cable
Do not kink the throttle cable – make
sure the throttle trigger moves freely.
: Press the throttle cable (13) into the
retainers (14).
Adjusting the Throttle Cable*
On control handles with slide*:
: Go to chapter "Adjusting the
Throttle Cable".
* see "Guide to Using this Manual"
8
7
10
11
1
12
002BA129 KN
12
9
13
14
13
14
14
393BA005 KN
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13KM 85, KM 85 R
English
Some machine versions are equipped
with a throttle cable adjuster in the
control handle.
A properly adjusted throttle cable is
the precondition for correct
operation in the full throttle, starting
throttle and idle positions.
Adjust the throttle cable only after
the unit is fully assembled – the
control handle must be in the normal
operating position.
: Use a suitable tool to push the slide
to the bottom of the slot (see
illustration).
: Press down the trigger interlock (1)
and squeeze the throttle trigger (2)
(full throttle) – this sets the throttle
cable correctly.
Loop Handle with Barrier Bar
: Insert square nuts (1) in the barrier
bar (2).
: Line up the holes.
Adjusting the Throttle Cable
002BA163 KN
STOP
249BA017 KN
1
2
Mounting the Loop Handle
2
002BA098 KN
1
1
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KM 85, KM 85 R
: Place the clamp (3) in the loop
handle (4) and position them both
against the drive tube (5).
: Fit the clamp (6) and place the
barrier bar (2) in position.
: Note correct position!
: Line up the holes.
: Insert screws (7) in holes and screw
them into the barrier bar as far as
stop.
: Go to “Securing the loop handle”.
Loop Handle without Barrier Bar
: Place the clamp (3) in the loop
handle (4) and position them both
against the drive tube (5).
: Fit the clamp (6) and line up the
holes.
: Fit washers (7) on screws (8) and
insert screws in holes. Screw on the
square nuts (1) as far as stop.
: Go to “Securing the Loop Handle”.
Securing the Loop Handle
: Secure the loop handle (4) approx.
8 in (20 cm) (A) forward of the
control handle (9).
: Line up the loop handle.
: Tighten down the screws firmly –
lock the nuts if necessaey.
: The sleeve (10) is country-specific
and must be located between the
loop handle and control handle.
5
4
002BA099 KN
2
3
6
7
4
5
002BA136 KN
1
6
1
3
8
7
8
7
10
9
4
002BA147 KN
A
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15KM 85, KM 85 R
English
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 RON.
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.
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.
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.
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 3 months of storage.
Store in approved safety fuel-canisters
only. When mixing, pour oil into the
canister first, and then add gasoline.
Examples
Dispose of empty mixing-oil canisters
only at authorized disposal locations.
Fuel
Gasoline Oil (STIHL 50:1 or
equivalent high-quality
oils)
liters liters (ml)
1 0.02 (20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)
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16
English
KM 85, KM 85 R
Before 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.
In order to reduce the risk of burns
or other personal injury from
escaping gas vapor and fumes,
remove the fuel filler cap carefully
so as to allow any pressure build-up
in the tank to release slowly.
After fueling, tighten fuel cap as
securely as possible by hand.
Change the fuel pick up body every
year.
Before storing your machine for a long
period, drain and clean the fuel tank and
run engine until carburetor is dry.
Controls
Control handle on bike handle
Throttle trigger interlock (1)
Throttle trigger (2)
Slide control (3)
Fueling
389BA031 KN
389BA032 KN
Starting / Stopping
the Engine
3
STOP
56
4
7
002BA182 KN
1
2
START
STOP-
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17KM 85, KM 85 R
English
Control handle on drive tube
Throttle trigger interlock (1)
Throttle trigger (2)
Slide control (3)
Positions of slide control
STOP-O (4) – engine off – the ignition is
switched off
# – normal run position (5) – the engine
is running or can start
START (6) - the ignition is switched on,
the engine can start
Symbol on slide control
h (7) – stop symbol and arrow – to stop
the engine, push the slide control in
direction of arrow on stop symbol (h ) to
STOP-O.
Starting
: Hold down the throttle trigger
interlock and squeeze the throttle
trigger.
: While holding both levers in this
position, move the slide control to
START and hold it there.
: Now release the throttle trigger,
slide control and trigger interlock in
that order. This is the starting
throttle position.
den
: Set the choke lever (8):
For cold start to
g
For warm start to e
– also use this position if engine has
been running but is still cold
: Press fuel pump bulb (9) at least five
times – even if the bulb is already
filled with fuel.
3
STOP
2
5
6
4
7
002BA181 KN
START
STOP-
1
393BA017 KN
8
8
393BA018 KN
9
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18
English
KM 85, KM 85 R
: Place the CombiEngine on the
ground: It must rest securely on the
engine support. Check that the tool
is not touching the ground or any
other obstacles – see also chapter
"Starting/Stopping the Engine" in
the CombiTool instruction manual.
: Make sure you have a firm footing.
: Press the unit firmly against the
ground with your left hand on the fan
housing. Your thumb should be
under the fan housing.
Do not stand or kneel on the drive
tube!
: Pull the starter grip slowly with your
right hand until you feel it engage –
and then give it a brisk strong pull.
Do not pull out starter rope to full
length – it might break.
: Do not let the starter grip snap back
– guide it slowly into the housing so
that the starter rope can rewind
properly.
: Crank the engine until it runs.
When engine begins to fire
: Set the choke lever to e and
continue cranking.
As soon as engine runs
: Blip the throttle trigger so that the
slide control moves to the normal
run position # and the engine settles
down to idle speed.
Make sure the carburetor is
correctly adjusted – the tool must
not move when the engine is idling.
Your machine is now ready for
operation.
Stopping the engine
: Push the slide control in direction
of arrow on stop symbol (h ) to
STOP-O.
At very low outside temperatures
As soon as engine runs:
: Blip the throttle trigger to disengage
the starting throttle position. The
slide control moves to the normal
run position # and the engine settles
down to idle speed.
: Open the throttle slightly.
: Warm up engine for brief period.
002BA038 KN
002BA040 KN
357BA033 KN
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19KM 85, KM 85 R
English
If the 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 has
flooded.
: Move the choke lever to e
: Set the slide control, interlock lever
and throttle trigger to the starting
throttle position.
: Start the engine by pulling the
starter rope firmly. 10 to 20 pulls
may be necessary.
If the engine still does not start:
: Move the slide control to STOP-O.
: Pull off the spark plug boot (10).
: Unscrew and dry off the spark plug.
: Open the throttle wide.
: Crank the engine several times with
the starter to clear the combustion
chamber.
: Refit the spark plug. Connect the
spark plug boot (press it down
firmly).
: Move the slide control to START.
: Set the choke lever to e –
even if engine is cold.
: Now start the engine.
Throttle cable adjustment
: Check adjustment of throttle cable –
see chapter on "Adjusting the
Throttle Cable".
Tank run until dry
: After refueling, press the fuel pump
bulb at least five times – even if bulb
is already filled with fuel.
: Set choke lever according to engine
temperature.
: Now start the engine.
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 engine to run for a while
at idle speed so that the heat in the
engine can be dissipated by flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After finishing work
Storing for short period:
Wait for engine to cool down. Drain the
fuel tank and keep the unit in a dry place,
away from sources of ignition, until you
need it again.
Storing for a long period:
see chapter "Storing the Machine".
10
393BA042 KN
Operating Instructions
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20
English
KM 85, KM 85 R
Dirty air filters reduce engine power
increase fuel consumption and make
starting more difficult.
If there is a noticeable loss of engine
power
: Move choke lever to g.
: Press in the tab (1).
: Ease the filter cover (2) over the tab
and take it away.
: Clean away loose dirt from around
the filter.
: Remove the foam and felt filter
elements.
: Wash the foam element in a clean,
non-flammable cleaning solution
(e.g. warm soapy water) and then
dry.
: Fit new felt element.
As a temporary measure you can
knock it out on the palm of your
hand or blow it out with compressed
air. Do not wash.
Replace damaged parts!
: Install the foam element (3) in the
filter cover (2).
: Place felt element (4) (lettering
facing inward) in filter housing (5).
: Fit filter cover so that it snaps into
position.
If the engine is low on power, check the
spark arresting screen in the muffler.
: Lift spark arresting screen and pull it
out sideways.
: Clean spark arresting screen if
necessary.
: If screen is damaged or coked up, fit
a new one.
: Refit the spark arresting screen.
* see “Guide to Using this Manual”
Cleaning the Air Filter
355BA014 KN
2
1
2
3
355BA031 KN
4
5
355BA032 KN
Spark Arresting Screen* in
Muffler
392BA035 KN
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