Stihl FS 89, 89 R Owner Manual

STIHL FS 89, 89 R
Instruction Manual
English
© ANDREAS STIHL AG & Co. KG, 2019
0458-460-0121-A. VA1.B19.
0000007281_006_GB
Printed on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
Original Instruction Manual
Contents
Guide to Using this Manual
Safety Precautions and Working
Techniques
Approved Combinations of Cutting
Attachment, Deflector, Handle and
Harness
Mounting the Bike Handle
Mounting the Loop Handle
Adjusting the Throttle Cable
Fitting the Carrying Ring
Mounting the deflector
Mounting the Cutting Attachment
Fuel
Fueling
Fitting the Harness
Balancing the Machine
Starting / Stopping the Engine
Transporting the Unit
Operating Instructions
Replacing the Air Filter
Adjusting the Carburetor
Spark Plug
Engine Running Behavior
Lubricating the Gearbox
Storing the Machine
Sharpening Metal Cutting Blades
Maintaining the Mowing Head
Maintenance and Care
Minimize Wear and Avoid Damage
Main Parts
Specifications
2
2
12
13
15
16
16
17
18
21
22
22
23
24
27
29
29
30
30
31
31
32
32
33
35
37
38
40
Maintenance and Repairs
Disposal
EC Declaration of Conformity
41
41
42
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
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
FS 89, FS 89 R
1
English
Guide to Using this Manual
WARNING
Pictograms
The meanings of the pictograms
attached to the machine are explained in
this manual.
Depending on the model concerned, the
following pictograms may be attached to
your machine.
Fuel tank; fuel mixture of
gasoline and engine oil
Operate decompression
valve
Manual fuel pump
Operate manual fuel
pump
Tube of grease
Intake air: Summer
operation
Intake air: Winter
operation
Handle heating
2
Symbols in text
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.
Safety Precautions and
Working Techniques
Some special safety precautions must be
observed to reduce the
risk of personal injury
when operating this
power tool because of the
very high speed of its cutting attachment.
It is important that you
read the instruction manual before first use and
keep it in a safe place for
future reference. Nonobservance of the
instruction manual may
result in serious or even
fatal injury.
Observe all applicable local safety
regulations, standards and ordinances.
If you have not used this type of power
tool before: Have your dealer or other
experienced user show you how it is
operated or attend a special course in its
operation.
Minors should never be allowed to use a
power tool.
Keep bystanders, especially children,
and animals away from the work area.
When the power tool is not in use, shut it
off so that it does not endanger others.
Secure it against unauthorized use.
The user is responsible for avoiding
injury to third parties or damage to their
property.
FS 89, FS 89 R
English
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.
servicing dealer. Use only high quality
tools and accessories in order to avoid
the risk of accidents and damage to the
machine.
The use of noise emitting power tools
may be restricted to certain times by
national or local regulations.
STIHL recommends the use of genuine
STIHL tools and accessories. They are
specifically designed to match the
product and meet your performance
requirements.
To operate the power tool you must be
rested, in good physical condition and
mental health.
If you have any condition that might be
aggravated by strenuous work, check
with your doctor before operating a
power tool.
Persons with pacemakers only: The
ignition system of your power tool
produces an electromagnetic field of a
very low intensity. This field may
interfere with some pacemakers. STIHL
recommends that persons with
pacemakers consult their physician and
the pacemaker manufacturer to reduce
any health risk.
Do not operate the power tool if you are
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Depending on the cutting attachment
fitted, use your power tool only for
cutting grass, wild growth, shrubs,
scrub, bushes, small diameter trees and
similar materials.
Do not use your power tool for any other
purpose because of the increased risk of
accidents.
Only use cutting 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 a
FS 89, FS 89 R
Never attempt to modify your machine in
any way since this may increase the risk
of personal injury. STIHL excludes all
liability for personal injury and damage
to property caused while using
unauthorized attachments.
Do not use a pressure washer to clean
your power tool. The solid jet of water
may damage parts of the power tool.
The deflector on this power tool cannot
protect the operator from all objects
thrown by the cutting attachment
(stones, glass, wire, etc.). Such objects
may ricochet and then hit the operator.
Clothing and Equipment
Wear proper protective clothing and
equipment.
Clothing must be sturdy
but allow complete freedom of movement. Wear
snug-fitting clothing, an
overall and jacket combination, do not wear a
work coat.
Avoid clothing that could
get caught on branches
or brush or moving parts
of the machine. Do not
wear a scarf, necktie or
jewelry. Tie up and confine long hair (e.g. with a
hair net, cap, hard hat,
etc.).
Wear steel-toed safety
boots with non-slip soles.
Sturdy shoes with non-slip soles may be
worn as an alternative only when using
mowing heads.
WARNING
To reduce the risk of eye
injuries, wear close-fitting safety glasses in
accordance with European Standard EN 166.
Make sure the safety
glasses are a comfortable and snug fit.
Wear a face shield and make sure it is a
good fit. A face shield alone does not
provide adequate eye protection.
Wear hearing protection, e.g. earplugs
or ear muffs.
Wear a safety hard hat for thinning
operations, when working in high scrub
and where there is a danger of head
injuries from falling objects.
3
English
Wear heavy-duty work
gloves made of durable
material (e.g. leather).
To reduce the risk of serious burn injuries, avoid
touching hot parts of the
machine, including the
gearbox housing.
STIHL offers a comprehensive range of
personal protective clothing and
equipment.
Transporting by vehicle: Properly secure
your power tool to prevent turnover, fuel
spillage and damage.
Transporting the Power Tool
Fueling
Gasoline is an extremely
flammable fuel. Keep
clear of naked flames. Do
not spill any fuel – do not
smoke.
Always shut off the engine before
refueling.
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual.
–
Check the fuel system for leaks,
paying special attention to visible
parts such as the tank cap, hose
connections and the manual fuel
pump (on machines so equipped). If
there are any leaks or damage, do
not start the engine – risk of fire.
Have your machine repaired by a
servicing dealer before using it
again.
–
Use only an approved combination
of cutting attachment, deflector,
handle and harness. All parts must
be assembled properly and
securely.
–
The stop switch must move freely.
–
Check smooth action of choke
knob, throttle trigger lockout and
throttle trigger – the throttle trigger
must return automatically to the idle
position. The choke knob must
spring back from the g and <
positions to the run position F when
the throttle trigger lockout and
throttle trigger are squeezed.
–
Check that the spark plug boot is
secure – a loose boot may cause
arcing that could ignite combustible
fumes and cause a fire.
–
Check cutting tool or attachment for
correct and secure assembly and
good condition.
Do not fuel a hot engine – fuel may spill
and cause a fire.
002BA079 KN
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly and avoid fuel spillage.
Always shut off the engine.
Carry the unit hanging from the shoulder
strap or properly balanced by the drive
tube.
To reduce the risk of cut injuries, fit
transport guard on the cutting
attachment, even when carrying the tool
for short distances – see also
"Transporting the Unit".
4
Fuel your power tool only in wellventilated areas. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
After fueling, tighten
down the fuel tank cap as
securely as possible.
This reduces the risk of unit vibrations
causing the fuel cap to loosen or come
off and spill quantities of fuel.
To reduce the risk of serious or fatal
burn injuries, check for fuel leakage. If
fuel leakage is found, do not start or run
the engine until leak is fixed.
FS 89, FS 89 R
English
–
Never attempt to modify the controls
or safety devices in any way.
–
Keep the handles dry and clean –
free from oil and dirt – for safe
control of the power tool.
–
Adjust the harness and handle(s) to
suit your height and reach. See
chapters on “Fitting the Harness”
and “Balancing the Machine".
To reduce the risk of accidents, do not
operate your power tool if it is damaged
or not properly assembled.
If you use a shoulder strap or full
harness: Practice removing and putting
down the machine as you would in an
emergency. To avoid damage, do not
throw the machine to the ground when
practicing.
Starting the Engine
Start the engine at least 3 meters from
the fueling spot, outdoors only.
Place the unit on firm ground in an open
area. Make sure you have good balance
and secure footing. Hold the unit
securely. The cutting attachment must
be clear of the ground and all other
obstructions because it may begin to run
when the engine starts.
FS 89, FS 89 R
Your power tool is a one-person unit. To
reduce the risk of injury from thrown
objects, do not allow other persons
within a radius of 15 meters of your own
position – even when starting.
Models with bike handle
To reduce the risk of
injury, avoid contact with
the cutting attachment.
Do not drop start the
power tool – start the
engine as described in
the instruction manual.
Note that the cutting
attachment continues to
run for a short period
after you let go of the
throttle trigger – flywheel
effect.
Check idle speed setting: The cutting
attachment must not rotate when the
engine is idling with the throttle trigger
released.
To reduce the risk of fire, keep hot
exhaust gases and hot muffler away
from easily combustible materials (e.g.
wood chips, bark, dry grass, fuel).
002BA055 KN
Check protective devices (e.g.
deflector for cutting attachment,
rider plate) for damage or wear.
Always replace damaged parts. Do
not operate your machine with a
damaged deflector or worn rider
plate (lettering and arrows no longer
legible).
Right handle on control handle, left hand
on left handle.
Models with loop handle
002BA080 KN
–
On models with a loop handle and
barrier bar, left hand on loop handle,
right hand on control handle, even if you
are left-handed.
During Operation
Holding and Controlling the Power Tool
Always hold the power tool firmly with
both hands on the handles.
Make sure you always have good
balance and secure footing.
Make sure you always have good
balance and secure footing.
In the event of imminent danger or in an
emergency, switch off the engine
immediately – operate the stop switch.
5
English
15m (50ft)
The cutting attachment may catch and
fling objects a great distance and cause
injury - therefore, do not allow any other
persons within a radius of 15 meters of
your own position. To reduce the risk of
damage to property, also maintain this
distance from other objects (vehicles,
windows). Even maintaining a distance
of 15 meters or more cannot exclude the
potential danger.
The correct engine idle speed is
important to ensure that the cutting
attachment stops rotating when you let
go of the throttle trigger.
Check and correct the idle speed setting
regularly. If the cutting attachment
continues to rotate when the engine is
idling, have the machine checked by
your servicing dealer. STIHL
recommends an authorized STIHL
servicing dealer.
Take special care in slippery conditions
(ice, wet ground, snow), on slopes or
uneven ground.
Watch out for obstacles: Roots and tree
stumps which could cause you to trip or
stumble.
Always stand on the ground while
working, never on a ladder, work
platform or any other insecure support.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
6
To reduce the risk of accidents, take a
break in good time to avoid tiredness or
exhaustion.
Work calmly and carefully – in daylight
conditions and only when visibility is
good. Stay alert so as not to endanger
others.
Your power tool produces
toxic exhaust fumes as
soon as the engine is
running. These fumes
may be colorless and
odorless and contain
unburned hydrocarbons
and benzol. Never run
the engine indoors or in
poorly ventilated locations, even if your model
is equipped with a catalytic converter.
To reduce the risk of serious or fatal
injury from breathing toxic fumes,
ensure proper ventilation when working
in trenches, hollows or other confined
locations.
To reduce the risk of accidents, stop
work immediately in the event of
nausea, headache, visual disturbances
(e.g. reduced field of vision), problems
with hearing, dizziness, deterioration in
ability to concentrate. Apart from other
possibilities, these symptoms may be
caused by an excessively high
concentration of exhaust gases in the
work area.
To reduce the risk of fire, do not smoke
while operating or standing near your
power tool. Note that combustible fuel
vapor may escape from the fuel system.
The dusts, vapor and smoke produced
during operation may be dangerous to
health. If the work area is very dusty or
smoky, wear a respirator.
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".
Check the fuel system in particular for
leaks and make sure the safety devices
are working properly. Do not continue
operating your power tool if it is
damaged. In case of doubt, consult your
servicing dealer.
Do not operate your power tool in the
starting throttle position – engine speed
cannot be controlled in this position.
To reduce the risk
of injury from
thrown objects,
never operate the
unit without the
proper deflector for
the type of cutting
attachment being
used.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run the engine
unnecessarily, accelerate the engine
only when working.
FS 89, FS 89 R
English
Inspect the work area:
Stones, pieces of metal
or other solid objects may
be thrown more than 15
meters and cause personal injury or damage
the cutting attachment
and property (e.g. parked
vehicles, windows).
The gearbox gets hot
during operation. To
reduce the risk of burn
injury, do not touch the
gearbox housing.
Sharpen metal cutting attachments
regularly as specified.
When using mowing heads
Unevenly sharpened metal cutting
attachments cause out-of-balance
which can impose extremely high loads
on the machine and increase the risk of
breakage.
Special care must be taken when
working in difficult, over-grown terrain.
Equip the deflector with the additional
components specified in the instruction
manual.
Dull or improperly sharpened cutting
edges can put a higher load on the
cutting attachment and increase the risk
of injury from cracked or broken parts.
When cutting high scrub, under bushes
and hedges: Keep cutting attachment at
a minimum height of 15 cm to avoid
harming small animals.
Use only the deflector with properly
mounted line limiting blade to ensure the
mowing lines are automatically trimmed
to the approved length.
Always shut off the engine before
leaving the unit unattended.
To reduce the risk of injury, always turn
off the engine before adjusting the nylon
line of manually adjustable mowing
heads.
Check the cutting attachment at regular
short intervals during operation or
immediately if there is a noticeable
change in cutting behavior:
–
Turn off the engine. Hold the unit
firmly and wait for the cutting
attachment to come to a standstill.
–
Check condition and tightness, look
for cracks.
–
Check sharpness.
–
Replace damaged or dull cutting
attachments immediately, even if
they have only superficial cracks.
Using the unit with over-long nylon
cutting lines reduces the engine's
operating speed. The clutch then slips
continuously and this causes
overheating and damage to important
components (e.g. clutch, polymer
housing components) – and this can
increase the risk of injury from the
cutting attachment rotating while the
engine is idling.
Using metal cutting attachments
Clean grass and plant residue off the
cutting attachment mounting at regular
intervals – remove any build up of
material from the cutting attachment and
deflector.
STIHL recommends the use of original
STIHL metal cutting attachments. They
are specifically designed to match your
model and meet your performance
requirements.
To reduce the risk of injury, shut off the
engine before replacing the cutting
attachment.
Metal cutting attachments rotate at very
high speed. The forces that occur act on
the machine, the attachment and the
material being cut.
FS 89, FS 89 R
Inspect metal cutting attachments for
cracks or warping after every contact
with hard objects (e.g. stones, rocks,
pieces of metal). To reduce the risk of
injury, remove burrs and other visible
build-ups of material (use a file) because
they may become detached and be
thrown at high speed during operation.
If a rotating metal cutting attachment
makes contact with a rock or other solid
object there is a risk of sparking which
may cause easily combustible material
to catch fire under certain
circumstances. Dry plants and scrub are
also easily combustible, especially in hot
and dry weather conditions. If there is a
risk of fire, do not use metal cutting
attachments near combustible
materials, dry plants or scrub. Always
contact your local forest authority for
information on a possible fire risk.
Do not continue using or attempt to
repair damaged or cracked cutting
attachments by welding, straightening or
modifying the shape (out of balance).
This may cause parts of the cutting
attachment to come off and hit the
operator or bystanders at high speed
and result in serious or fatal injuries.
7
English
To reduce the above-mentioned risks
when using a metal cutting attachment,
never use a metal cutting attachment
with a diameter larger than specified. It
must not be too heavy. It must be
manufactured from materials of
adequate quality and its geometry must
be correct (shape, thickness).
To reduce the risk of injury, a metal
cutting attachment not manufactured by
STIHL must not be heavier, thicker,
have a different shape or a diameter
larger than the largest metal cutting
attachment approved by STIHL for this
power tool model.
Vibrations
Prolonged use of the power tool may
result in vibration-induced circulation
problems in the hands (whitefinger
disease).
No general recommendation can be
given for the length of usage because it
depends on several factors.
The period of usage is prolonged by:
–
Hand protection (wearing warm
gloves)
–
Work breaks
The period of usage is shortened by:
–
Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, tingling
sensations).
–
Low outside temperatures.
–
The force with which the handles
are held (a tight grip restricts
circulation).
8
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear (e.g. tingling
sensation in fingers), seek medical
advice.
Do not turn the engine over on the
starter with the spark plug boot or spark
plug removed since there is otherwise a
risk of fire from uncontained sparking.
Maintenance and Repairs
Check the fuel filler cap for leaks at
regular intervals.
Service the machine regularly. Do not
attempt any maintenance or repair work
not described in the instruction manual.
Have all other work performed by a
servicing dealer.
Use only a spark plug of the type
approved by STIHL and make sure it is
in good condition – see "Specifications".
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.
Check the condition of the muffler.
Only use high-quality replacement parts
in order to avoid the risk of accidents
and damage to the machine. If you have
any questions in this respect, consult a
servicing dealer.
Vibration behavior is influenced by the
condition of the AV elements – check the
AV elements at regular intervals.
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 from
unintentional engine startup, always
shut off the engine and disconnect the
spark plug boot before performing any
repairs, maintenance or cleaning work. –
Exception: Carburetor and idle speed
adjustments.
To reduce the risk of fire, do not service
or store your machine near open flames.
Inspect the ignition lead (insulation in
good condition, secure connection).
To reduce the risk of fire and damage to
hearing, do not operate your machine if
the muffler is damaged or missing. –
Do not touch a hot muffler since burn
injury will result.
Symbols on Deflectors
An arrow on the deflector shows the
correct direction of rotation of the cutting
attachments.
Some of the following symbols are
applied to the outside of the deflector to
indicate the approved combination of
cutting attachment and deflector.
Deflector may be used
with mowing heads.
FS 89, FS 89 R
English
Deflector must not be
used with mowing heads.
Shoulder Strap/Harness
Mowing Head with Nylon Line
The shoulder strap/harness is included
with the machine or available as a
special accessory.
Deflector must not be
used with grass cutting
blades.
Deflector may be used
with brush knives.
Deflector must not be
used with brush knives.
Deflector must not be
used with shredder
blades.
Deflector must not be
used with circular saw
blades.
N
Use the shoulder strap/harness.
N
With the engine running, attach the
machine to the shoulder
strap/harness.
Grass cutting blades and brush knives
must always be used in combination
with a shoulder strap.
Circular saw blades must always be
used in combination with a full harness
with a quick-release system.
000BA015 KN
0000-GXX-0498-A0
Deflector may be used
with grass cutting blades.
Nylon line achieves a soft cut for edging
and trimming around trees, fence posts,
etc. – less risk of damaging tree bark.
The mowing head comes with an
instruction leaflet. Refill the mowing
head with nylon line as described in the
instruction leaflet.
WARNING
To reduce the risk of serious injury,
never use wire or metal-reinforced line in
place of the nylon line.
STIHL Polycut Mowing Head with
Polymer Blades
For mowing unobstructed edges of
meadows (without posts, fences, trees
or similar obstacles).
FS 89, FS 89 R
9
English
Check the wear limit marks!
Risk of Kickout (Blade Thrust) with Metal
Cutting Attachments
Grass Cutting Blade
If one of the wear limit marks on the
PolyCut mowing head is worn through
(arrow): Do not continue using the
mowing head. Install a new one. There
is otherwise a risk of injury from thrown
parts of the head.
It is important to follow the maintenance
instructions for the PolyCut mowing
head.
When using metal cutting attachments there is
a risk of kickout when the
rotating blade comes into
contact with a solid object
such as a tree trunk,
branch, tree stump, rock
or similar. The machine is
thrown to the right or to
the rear – opposite to the
attachment's direction of
rotation.
000BA020 KN
002BA049 KN
WARNING
The mowing head comes with
instruction leaflets. Equip the mowing
head with polymers blades or nylon line
as described in the instruction leaflets.
WARNING
Never use wire in place of the nylon
mowing line – risk of injury.
002BA135 KN
The PolyCut can also be equipped with
mowing line in place of the polymer
blades.
The risk of kickout is greatest when the
black area of the rotating cutting
attachment comes into contact with a
solid object.
Use for grass and weeds only – sweep
the brushcutter in an arc like a scythe.
WARNING
Improper use may damage the grass
cutting blade – risk of injury from thrown
parts.
Resharpen the grass cutting blade
according to instructions when it has
dulled noticeably.
Brush Knife
For cutting matted grass, wild growth
and scrub and thinning young stands
with a stem diameter of no more than
2 cm – do not cut thicker stems – risk of
accidents.
10
FS 89, FS 89 R
English
002BA509 KN
Use the brushcutter like a scythe (sweep
it to the right and left) at ground level
when cutting grass and thinning young
stands.
To cut wild growth and scrub, lower the
brush knife down onto the growth to
achieve a shredding effect – always
keep the cutting attachment below hip
level during this process.
Exercise extreme caution when using
this method of cutting. The higher the
cutting attachment is off the ground, the
greater the risk of injury from cuttings
being thrown sideways.
Warning! Improper use of a brush knife
may cause it to crack, chip or shatter –
risk of injury from thrown parts.
–
Avoid contact with stones, rocks,
pieces of metal and other solid
foreign objects.
–
Never cut wood or shrubs with a
stem diameter of more than 2 cm –
use a circular saw blade for such
work.
–
Inspect the brush knife at regular
short intervals for signs of damage.
Do not continue working with a
damaged brush knife.
–
Resharpen the brush knife regularly
and whenever it has dulled
noticeably, and have it balanced if
necessary (STIHL recommends a
STIHL servicing dealer).
Circular Saw Blade
For cutting shrubs and trees:
Up to a stem diameter of 4 cm when
used on brushcutters.
Up to a stem diameter of 7 cm when
used on clearing saws.
Before starting the cut, accelerate the
engine up to full throttle. Perform cut
with uniform pressure.
good time – dull teeth may result in the
blade cracking and shattering and
causing serious injury.
When felling, maintain a distance of at
least two tree lengths from the next
felling site.
Risk of kickout
002BA068 KN
002BA355 KN
To reduce the risk of injury it is essential
to take the following precautions:
The risk of kickout is highest in the black
area of the blade: Do not use this area of
the circular saw blade for cutting.
There is also a risk of kickout when
using the lighter shaded areas of the
blade: These areas of the blade should
only be used by experienced operators
with specialized training.
STIHL recommends that you use the
non-shaded area of the circular saw
blade. Always start the cut with this area
of the blade.
Use circular saw blades only with a
matching limit stop of the correct
diameter.
WARNING
To reduce the risk of blade damage,
avoid contact with stones and the
ground. Resharpen the blade properly in
FS 89, FS 89 R
11
English
Approved Combinations of Cutting Attachment, Deflector, Handle and Harness
Cutting Attachment
Deflector, Limit Stop
2
1
Shoulder Strap/Harness
17
12
4
3
Handle
18
22
23
22
23
19
13
20
9
23
14
5
6
21
7
8
10
18
19
15
11
12
16
20
24
0000-GXX-1286-A3
20
FS 89, FS 89 R
English
Approved Combinations
WARNING
For safety reasons only the cutting
attachments, deflectors, handles and
harnesses shown in each row of the
table may be used together. No other
combinations are permitted because of
the risk of accidents.
Cutting Attachments
Mowing heads
1
2
3
4
5
STIHL SuperCut 20-2
STIHL AutoCut C 26-2
STIHL AutoCut 25-2
STIHL DuroCut 20-2
STIHL PolyCut 20-3
Metal cutting attachments
6
Grass cutting blade 230-2
(230 mm dia.)
7
Grass cutting blade 260-2
(260 mm dia.)
8
Grass cutting blade 230-4
(230 mm dia.)
9
Grass cutting blade 230-8
(230 mm dia.)
Non-metal grass cutting blades, brush
knives and circular saw blades are not
approved.
Mounting the Bike Handle
Mounting the Handlebar
Deflectors, Limit Stop
12
13
14
15
Deflector for mowing heads
Deflector with
skirt and blade, for mowing heads
Deflector without skirt and blade, for
metal cutting attachments, items 6
to 10
16 Limit stop for circular saw blades
7
7
6
1
4
3
Handles
17
18
19
20
Harness
21
22
23
24
A
Loop handle
Loop handle with
barrier bar
Bicycle handle
Shoulder strap may be used
Shoulder strap must be used
Full harness may be used
Full harness must be used
0000-GXX-1283-A0
Select correct combination from the
table according to the cutting
attachment you intend to use.
WARNING
N
Mount the handlebar (1) on the
drive tube (2) about 40 cm/15 in (A)
forward of the engine housing.
N
Place the clamp (3) and handle
support (4) against the drive
tube (2).
10 Brush knife 250-3
(250 mm dia.)
11 Chisel tooth circular saw blade 20022 (4112), Chisel tooth circular saw
blade 200-22 HP (4001)
FS 89, FS 89 R
13
English
Securing the handlebar
Mounting the Control Handle
13
14
A
5
11
002BA237 KN
1
10
Place the handlebar (1) in the
handle support so that distance A is
no more than 15 cm/6 in – the
rubber handle (5) must be on the left
(viewed from engine).
Place the clamp (6) on the handle
support.
N
Insert the screws (7) through the
holes in the parts and screw them
into the clamp (3) as far as stop.
N
Line up the handlebar.
N
Tighten down the screws firmly.
13
12
14
9
0000-GXX-1285-A0
N
8
1
12
0000-GXX-1284-A0
N
14
N
Push the throttle cable (13) into the
retainers (14).
N
Take out the screw (8) – the nut (9)
remains in the control handle (10).
Adjusting the Throttle Cable
N
Push the control handle onto the
handlebar (1) until the holes (12)
line up – the throttle trigger (11)
must point towards the gearbox.
Some machine versions are equipped
with a throttle cable adjuster.
N
Insert the screw (8) and tighten it
down firmly.
N
Check adjustment of throttle cable –
see chapter on "Adjusting the
Throttle Cable".
Fitting the Throttle Cable
NOTICE
Do not kink the throttle cable or lay it in
tight radii – make sure the throttle trigger
moves freely.
14
FS 89, FS 89 R
English
Mounting the Loop Handle without
Barrier Bar
Mounting the Loop Handle
2
4
Mounting Loop Handle with Barrier Bar
7
8
7
8
4
3
5
7
1
N
002BA098 KN
1
N
Fit the square nuts (1) in the barrier
bar (2); the holes must line up.
FS 89, FS 89 R
5
6
Place the clamp (3) in the loop
handle (4) and position them both
against the drive tube (5).
N
Position the clamp (6) against the
drive tube.
N
Place the barrier bar (2) in position
as shown.
N
Line up the holes.
N
Insert the screws (7) in the holes
and screw them into the barrier
bar (2) as far as stop.
N
3
1
002BA614 KN
6
002BA099 KN
2
1
N
Place the clamp (3) in the loop
handle (4) and position them both
against the drive tube (5).
N
Position the clamp (6) against the
drive tube.
N
Line up the holes.
N
Fit washers (8) on the screws (7)
and insert the screws in the holes.
Fit the square nuts (1) and screw
them down as far as stop.
N
Go to "Securing the Loop Handle".
Go to "Securing the Loop Handle".
15
English
Securing the Loop Handle
Adjusting the Throttle Cable
Fitting the Carrying Ring
It may be necessary to correct the
adjustment of the throttle cable after
assembling the machine or after a
prolonged period of operation.
Polymer Version
Adjust the throttle cable only when the
unit is completely and properly
assembled.
A
1
4
Recommendation: distance (A):
about 20 cm (8 in)
N
Set the throttle trigger to the full
throttle position.
N
Carefully rotate the screw in the
throttle trigger in the direction of the
arrow until you feel initial resistance.
Then rotate it another half turn in the
same direction.
002BA529 KN
The loop handle can be adjusted to suit
the height and reach of the operator and
the application by changing
distance (A).
002BA655 KN
002BA615 KN
9
For position of carrying ring see "Main
Parts".
N
Slide the handle to the required
position.
N
Push the carrying ring (1) over the
drive tube.
N
Line up the loop handle (4).
N
N
Tighten down the screws until the
loop handle can no longer be
rotated on the drive tube. If no
barrier bar is fitted – lock the nuts if
necessary.
Insert the M5 nut in the hex recess
in the carrying ring.
N
Fit the M5x14 screw.
N
Line up the carrying ring.
N
Tighten down the screw firmly.
The sleeve (9) (not fitted on all models)
must be between the loop handle and
the control handle.
16
FS 89, FS 89 R
English
Fitting the Skirt and Blade
Mounting the deflector
Mounting the Blade
WARNING
Mounting the Deflector
1
002BA638 KN
Risk of injury from thrown objects and
contact with the cutting attachment.
These parts must be fitted to the
deflector (1) when you use a mowing
head.
Fitting the Skirt
3
N
Slide the line limiting blade into the
guide on the skirt.
N
Insert the screw and tighten it down
firmly.
2
002BA637 KN
Mounting the Limit Stop
1
2
Deflector for mowing attachments
Deflector for mowing heads
N
7
Slide the lower guide slot of the skirt
onto the deflector – it must snap into
position.
6
002BA639 KN
002BA636 KN
3
Removing the Skirt
Deflectors (1 and 2) are both mounted to
the gearbox in the same way.
Place the deflector on the gearbox
flange.
N
Insert the screws (3) and tighten
them down firmly.
FS 89, FS 89 R
WARNING
2.
1.
002BA646 KN
N
N
Insert the stop pin into the hole in
the skirt and use it to push the skirt
to the left.
N
Pull the skirt off the deflector.
Risk of injury from thrown objects and
contact with the cutting attachment.
Always fit the limit stop (6) when you use
a circular saw blade.
N
Position the limit stop (6) on the
gearbox flange.
N
Insert the screws (7) and tighten
them down firmly.
17
English
Blocking the Shaft
Mounting the Cutting
Attachment
3
Placing power tool on the ground
7
2
N
Shut off the engine.
N
Lay your power tool on its back so
that the cutting attachment
mounting face is pointing up.
Mounting Hardware for Cutting
Attachments
The mounting hardware supplied
depends on the cutting attachment that
comes as original equipment with the
new machine.
1
0000-GXX0500-A0
002BA104 KN
6
Depending on the cutting attachment, it
may be necessary to use the nut (3) and
rider plate (2). The thrust plate (1) must
be used with all cutting attachments.
These parts are included in a kit
supplied with the machine and are also
available as special accessories.
6
002BA330 KN
2
The output shaft (2) must be blocked
with the stop pin (6) or screwdriver (6) to
mount or remove cutting attachments.
These parts come standard with the
machine or are available as special
accessories.
N
Insert the stop pin (6) or
screwdriver (6) in the hole (7) in the
gearbox as far as stop – and apply
slight pressure.
N
Rotate shaft, nut or cutting
attachment until the stop pin slips
into position and blocks the shaft.
Machine supplied without mounting
hardware
Machine supplied with mounting
hardware
2
002BA266 KN
Mowing heads and metal cutting
attachments may be mounted.
Only mowing heads may be used which
mount directly to the shaft (2).
18
FS 89, FS 89 R
English
Fitting Mowing Head with Screw
Mounting
Removing the Mounting Hardware
Remove the mowing head.
Keep the instruction leaflet for the
mowing head in a safe place.
2
N
Block the shaft (4) with the stop pin
(2).
N
Unscrew and remove the mowing
head (3) clockwise.
Mounting Metal Cutting Attachments
3
4
3
5
0000-GXX-1323-A0
N
Block the shaft (5) with the stop pin
(1).
N
Use the combination wrench (2) to
loosen and remove the nut (3)
clockwise (left-hand thread).
Take the rider plate (4) off the
shaft (5). Do not remove the thrust
plate (6).
1
2
N
Fit the thrust plate (1).
N
Screw the mowing head (3)
counterclockwise on to the shaft (4)
as far as stop.
N
Block the shaft (4) with the stop pin
(2).
N
Tighten down the mowing head (3)
firmly.
Mounting the Cutting Attachment
WARNING
Risk of injury from thrown objects and
contact with the cutting attachment. Use
a deflector that matches the cutting
attachment – see "Mounting the
Deflector".
FS 89, FS 89 R
Wear protective gloves to reduce the
risk of direct contact with the sharp
cutting edges.
0000-GXX-1324-A0
1
WARNING
4
6
N
Keep the leaflet and packaging of the
metal cutting attachment in a safe place.
Mount only one metal cutting
attachment.
NOTICE
Remove the tool used to block the shaft.
19
English
Check direction of rotation of cutting
attachment
NOTICE
14
Remove the tool used to block the shaft.
Removing the Metal Cutting Attachment
13
3
2
4
9
8
681BA303 KN
6
Cutting attachments 2, 4, 5 and 6 may
be mounted either way round – they
must be turned over regularly to help
avoid one-sided wear.
The cutting edges of cutting
attachments 1, 3, 7 and 8 must point
clockwise.
Direction of rotation is indicated by an
arrow on the inside of the deflector.
Wear protective gloves to reduce the
risk of direct contact with the sharp
cutting edges.
8
11
5
7
WARNING
10
12
0000-GXX-0502-A0
1
N
Fit the thrust plate (9).
N
Place the cutting attachment (8) on
the thrust plate (9).
N
Block the shaft (11) with the stop pin
(12).
N
Unscrew the mounting nut (13)
clockwise.
N
Remove cutting attachment and its
mounting hardware from the
gearbox – but do not remove the
thrust plate (9).
Collar (see arrow) must engage the
cutting attachment's mounting hole.
Securing the cutting attachment
N
Fit the rider plate (10).
N
Block the shaft (11) with the stop pin
(12).
N
Use the combination wrench (14) to
screw the mounting nut (13) on to
the output shaft counterclockwise
and tighten it down firmly.
WARNING
There is a risk of injury if the cutting
attachment works loose. If the mounting
nut has become too loose, fit a new one.
20
FS 89, FS 89 R
English
Fuel
Your engine requires a mixture of
gasoline and engine oil.
WARNING
For health reasons, avoid direct skin
contact with gasoline and avoid inhaling
gasoline vapor.
STIHL MotoMix
STIHL recommends the use of STIHL
MotoMix. This ready-to-use fuel mix
contains no benzol or lead, has a high
octane rating and ensures that you
always use the right mix ratio.
STIHL MotoMix uses STIHL HP Ultra
two-stroke engine oil for an extra long
engine life.
MotoMix is not available in all markets.
Mixing Fuel
Gasoline with an ethanol content of
more than 10% can cause running
problems in engines with a manually
adjustable carburetor and should not be
used in such engines.
Engines equipped with M-Tronic deliver
full power when run on gasoline with an
ethanol content of up to 25% (E25).
Engine Oil
If you mix the fuel yourself, use only
STIHL two-stroke engine oil or another
high-performance engine oil in
accordance with JASO FB, JASO FC,
JASO FD, ISO-L-EGB, ISO-L-EGC or
ISO-L-EGD.
STIHL specifies STIHL HP Ultra twostroke engine oil or an equivalent highperformance engine oil in order to
maintain emission limits over the
machine’s service life.
STIHL 50:1 two-stroke engine oil: 50
parts gasoline to 1 part oil
Unsuitable fuels or lubricants or mix
ratios other than those specified may
result in serious damage to the engine.
Poor quality gasoline or engine oil may
damage the engine, sealing rings, hoses
and the fuel tank.
Gasoline
Use only high-quality brand-name
gasoline with a minimum octane rating
of 90 – leaded or unleaded.
FS 89, FS 89 R
Gasoline
Liters
1
5
10
15
20
25
N
Store fuel only in approved safety-type
fuel canisters in a dry, cool and safe
location protected from light and the sun.
Fuel mix ages – only mix sufficient fuel
for a few weeks work. Do not store fuel
mix for longer than 30 days. Exposure to
light, the sun, low or high temperatures
can quickly make the fuel mix unusable.
STIHL MotoMix may be stored for up to
2 years without any problems.
N
Thoroughly shake the mixture in the
canister before fueling your
machine.
WARNING
Pressure may build up in the canister –
open it carefully.
N
Mix Ratio
Examples
NOTICE
Storing Fuel
Clean the fuel tank and canister
from time to time.
Dispose of remaining fuel and cleaning
fluid properly in accordance with local
regulations and environmental
requirements.
STIHL engine oil 50:1
Liters
(ml)
0.02
(20)
0.10
(100)
0.20
(200)
0.30
(300)
0.40
(400)
0.50
(500)
Use a canister approved for storing
fuel. Pour oil into canister first, then
add gasoline and mix thoroughly.
21
English
Filling Up with Fuel
Fueling
Fitting the Harness
Take care not to spill fuel while fueling
and do not overfill the tank.
STIHL recommends you use the STIHL
filler nozzle for fuel (special accessory).
N
Preparations
Fill up with fuel.
Closing the Tank Cap
The type and style of the
harness/shoulder strap depend on the
market.
The use of the shoulder strap is
described in the chapter on "Approved
Combinations of Cutting Attachment,
Deflector, Handle and Harness".
N
N
Before fueling, clean the filler cap
and the area around it to ensure that
no dirt falls into the tank.
Position the machine so that the
tank cap faces up.
1
002BA448 KN
0000-GXX-0476-A0
Shoulder Strap
N
Place the cap in the opening.
N
Turn the cap clockwise as far as
stop and tighten it down as firmly as
possible by hand.
Opening the Tank Cap
002BA447 KN
0000-GXX-0503-A0
2
N
Turn the cap counterclockwise until
it can be removed from the tank
opening.
N
Remove the tank cap.
22
N
Put on the shoulder strap (1).
N
Adjust the length of the strap so that
the carabiner (2) is about a hand’s
width below your right hip.
N
Balance the machine – see
"Balancing the Machine".
FS 89, FS 89 R
English
Full Harness
Balancing the Machine
Attaching Machine to Harness
1
3
2
1
1
2
2
1
0000-GXX-0504-A0
N
N
1
N
Loosen the screw (1).
N
002BA660 KN
N
Slide the carrying ring (2) along the
drive tube.
N
Tighten the screw (1) moderately.
N
Allow the unit to hang freely.
The type and style of the shoulder strap
and carabiner depend on the market.
N
Check the position obtained:
2
Put on the harness (1) and close the
locking plate (3).
Adjust the length of the strap – with
the machine attached, the
carabiner (2) must be about a
hand's width below your right hip.
Balance the machine – see
"Balancing the Machine".
002BA662 KN
2
N
Attach the carabiner (1) to the
carrying ring (2) on the drive tube.
Balanced positions
The unit is balanced differently
depending on the cutting attachment
used.
Proceed as follows until the conditions
specified under "Floating positions"
have been met:
A
Mowing tools (A) such as mowing
heads, grass cutting blades and brush
knives
N
FS 89, FS 89 R
002BA034 KN
Balancing the Machine
should just touch the ground.
23
English
Version with Loop Handle
3
1
002BA035 KN
Controls
B
Version with Bike Handle
2
Circular saw blades (B)
N
should "hover" about 20 cm (8 in)
above the ground.
3
When the correct balanced position has
been reached:
N
1
2
3
Tighten down the screw (1) on the
carrying ring firmly.
2
Disconnecting Machine from Harness
0000-GXX-0494-A0
1
2
3
2
1
2
N
24
2
Throttle trigger lockout
Throttle trigger
Stop switch with Run and Stop
positions. Depress the stop switch
(…) to switch off the ignition – see
"Function of stop switch and ignition
system".
The ignition is switched off and the
engine stopped when the stop switch is
pressed. 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.
002BA661 KN
1
Throttle trigger lockout
Throttle trigger
Stop 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
1
1
0000-GXX-0477-A0
Starting / Stopping the
Engine
Press down the bar on the
carabiner (1) and pull the carrying
ring (2) out of the carabiner.
FS 89, FS 89 R
English
0000-GXX-0479-A0
N
Press the manual fuel pump
bulb (9) at least five times – even if
the bulb is already filled with fuel.
Press in the choke knob (8) and turn
it to the position that suits the engine
temperature:
g if the engine is cold
< for warm start – also use this position if the engine has been running
but is still cold.
The choke knob must engage in
position.
0000-GXX-0480-A0
0000-GXX-0478-A0
N
N
Place the unit on the ground: It must
rest securely on the engine support
and the deflector.
N
If fitted: Remove the transport guard
from the cutting attachment.
To reduce the risk of accidents, check
that the cutting attachment is not
touching the ground of any other
obstacles.
N
Make sure you have a firm footing,
either standing, stooping or
kneeling.
N
Hold the unit firmly on the ground
with your left hand and press down
– do not touch the throttle trigger or
lockout lever – your thumb should
be under the fan housing.
0000-GXX-0481-A0
Cranking
Starting the Engine
N
Hold the starter grip with your right
hand.
N
Pull the starter grip slowly until you
feel it engage and then give it a brisk
strong pull.
NOTICE
Do not pull out the starter rope all the
way – it might otherwise break.
N
Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N
Continue cranking until the engine
runs.
NOTICE
Do not stand or kneel on the drive tube.
FS 89, FS 89 R
25
English
As soon as the engine runs
Stopping the Engine
N
Depress the momentary contact
stop switch – the engine stops –
release the stop switch – it springs
back to the run position.
Other Hints on Starting
Fuel tank run until completely dry
N
After refueling, press the manual
fuel pump bulb at least five times –
even if the bulb is already filled with
fuel.
N
Set the choke lever to suit the
engine temperature.
N
Now start the engine.
Engine stalls in cold start position g or
under acceleration.
002BA664 KN
N
N
Press down the throttle trigger
lockout and open the throttle – the
choke knob moves to the run
position F. After a cold start, warm
up the engine by opening the
throttle several times.
WARNING
There is a risk of injury if the cutting
attachment runs when the engine is
idling. Adjust the carburetor so that the
cutting attachment does not run when
the engine is idling – see “Adjusting the
Carburetor”.
Move the choke knob to < and
continue cranking until the engine
runs.
Engine does not start in warm start
position <
N
Move the choke knob to g and
continue cranking until the engine
runs.
If the engine does not start
N
Check that all settings are correct.
N
Check that there is fuel in the tank
and refuel if necessary.
N
Check that the spark plug boot is
properly connected.
N
Repeat the starting procedure.
Engine is flooded
N
Move the choke knob to F and
continue cranking until the engine
runs.
Your machine is now ready for
operation.
26
FS 89, FS 89 R
English
Transporting the Unit
The type of transport guard depends on
the metal cutting attachment supplied
with the machine. Transport guards are
available as special accessories.
681BA269 KN
681BA270 KN
Using Transport Guard
681BA271 KN
250 mm Brush Knives
FS 89, FS 89 R
681BA268 KN
681BA269 KN
681BA272 KN
681BA268 KN
681BA272 KN
230 mm Grass Cutting Blades
27
English
681BA302 KN
Circular Saw Blades
681BA301 KN
Grass Cutting Blades up to 260 mm
Disconnect wire rod from the
transport guard.
N
Swing wire rod outwards.
Fit the transport guard on the cutting
attachment from below.
1.
N
2.
N
Swing wire rod into position.
N
Hook wire rod to the transport
guard.
681BA275 KN
N
Disconnect wire rod from the
transport guard.
681BA311 KN
N
681BA275 KN
1.
28
2.
681BA305 KN
2.
FS 89, FS 89 R
English
681BA276 KN
During break-in period
N
Swing wire rod outwards.
N
Fit transport guard on saw blade
from below, making sure the limit
stop is properly seated in the
recess.
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.
N
Swing wire rod into position.
N
Hook wire rod to the transport
guard.
FS 89, FS 89 R
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 enginemounted components (ignition,
carburetor) from thermal overload.
681BA277 KN
Filters have an average life of more than
a year. Do not remove the filter cover or
replace the air filter as long as there is no
noticeable loss of power.
If there is a noticeable loss of engine
power
4
3
2
1
During Operation
After Finishing Work
2.
Replacing the Air Filter
0000-GXX-0482-A0
Operating Instructions
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-ofservice periods – see "Storing the
Machine".
1
N
Turn the choke knob to g.
N
Loosen the screws (1).
N
Remove the filter cover (2).
N
Clean away loose dirt from around
the filter.
N
Remove the filter element (3).
N
Replace dirty or damaged filter
element (3).
N
Replace any damaged parts.
Installing the Filter Element
N
Install the filter element (3) in the
filter housing and fit the cover.
N
Insert the screws (1) and tighten
them down firmly.
29
English
The carburetor has been set at the
factory to provide an optimum fuel-air
mixture under most operating
conditions.
N
If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N
Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Adjusting Idle Speed
0000-GXX-0495-A0
Removing the Spark Plug
1
N
Warm up the engine for about
3 minutes.
Turn the idle speed screw (LA)
slowly clockwise until the engine
runs smoothly – the cutting
attachment must not run.
Cutting attachment runs when engine is
idling
N
Turn the idle speed screw (LA)
slowly counterclockwise until the
cutting attachment stops running
and then turn the screw about
another 1/2 to 3/4 turn in the same
direction.
WARNING
If the cutting attachment continues to run
when the engine is idling, have your
machine checked and repaired by your
servicing dealer.
30
3
N
Remove the cover (1).
N
Pull off the spark plug boot (2).
N
Unscrew the spark plug (3).
0000-GXX 0537-A0
N
A
N
Clean dirty spark plug.
N
Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N
Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
2
Engine stops while idling
000BA039 KN
Checking the Spark Plug
Spark Plug
–
Too much oil in fuel mix.
–
Dirty air filter.
–
Unfavorable running conditions.
1
000BA045 KN
Adjusting the Carburetor
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
FS 89, FS 89 R
English
Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the Spark Plug
N
Screw the spark plug (3) into the
cylinder.
N
Tighten down the spark plug (3) with
the combination wrench.
N
Press the boot (2) firmly onto the
spark plug.
N
Fit the cover (1) and screw it down
firmly.
Engine Running Behavior
Lubricating the Gearbox
If engine running behavior is
unsatisfactory even though the air filter
is clean and the carburetor is properly
adjusted, the cause may be the muffler.
1
Have the muffler checked for
contamination (carbonization) by your
servicing dealer.
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
servicing dealer.
0000-GXX-0536-A0
N
Check grease level after every 25 hours
of operation and re-lubricate if
necessary.
N
Remove the screw plug (1).
N
If no grease can be seen on the
inside of the screw plug (1): Screw
the tube (2) of STIHL gear lubricant
(special accessory) into the filler
hole.
N
Squeeze no more than 5 g (1/5 oz)
grease into the gearbox.
NOTICE
Do not completely fill the gearbox with
grease.
FS 89, FS 89 R
N
Unscrew the tube (2).
N
Insert the screw plug (1) and tighten
it down firmly.
31
English
For periods of 3 months or longer
N
Drain and clean the fuel tank in a
well ventilated area.
N
Dispose of fuel properly in
accordance with local
environmental requirements.
N
Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N
Remove, clean and inspect the
cutting attachment. Coat metal
cutting attachments with corrosion
inhibitor.
N
Thoroughly clean the machine.
N
Clean the air filter.
N
Store the machine in a dry and
secure location – out of the reach of
children and other unauthorized
persons.
Balancing
Sharpening Metal Cutting
Blades
N
Use a sharpening file (special
accessory) to sharpen dull cutting
attachments. In case of more
serious wear or nicks: Resharpen
with a grinder or have the work done
by a dealer – STIHL recommends a
STIHL servicing dealer.
N
Sharpen frequently, take away as
little metal as possible – two or three
strokes of the file are usually
enough.
1
N
After resharpening about 5 times,
check the cutting attachment for
out-of-balance on a STIHL balancer
(special accessory) or have it
checked by a dealer and rebalanced as necessary – STIHL
recommends a STIHL servicing
dealer.
1
1
2
2
2
1
1
2
N
2
002BA665 KN
Storing the Machine
Resharpen the teeth (1) uniformly –
do not alter the contour of the parent
blade (2) in any way.
See cutting attachment packaging for
additional sharpening instructions. Keep
the packaging for future reference.
32
FS 89, FS 89 R
English
Adjusting Nylon Line
Maintaining the Mowing
Head
STIHL SuperCut
Placing power tool on the ground
Fresh line is advanced automatically if
the remaining line is at least 6 cm
(2 1/2 in) long. The blade on the
deflector trims overlong lines to the
correct length.
002BA104 KN
STIHL AutoCut
N
Shut off the engine.
N
Lay your power tool on its back so
that the cutting attachment
mounting face is pointing up.
Replacing Nylon Line
Always check the mowing head for signs
of wear before replacing the nylon line.
WARNING
If there are signs of serious wear,
replace the complete mowing head.
The nylon mowing line is referred to as
"nylon line" or "line" in the following.
The mowing head is supplied with
illustrated instructions for replacing the
nylon line. Keep the instructions for the
mowing head in a safe place.
N
N
With the engine running, hold the
rotating mowing head above the
grass surface.
N
Tap it on the ground once – fresh
line is advanced and the blade on
the deflector trims it to the right
length.
Fresh line is advanced every time the
mowing head is tapped on the ground.
For this reason observe the mowing
head's cutting performance during
operation. If the mowing head is tapped
on the ground too often, the line limiting
blade will unnecessarily cut off unused
lengths of nylon line.
Line feed operates only if both lines are
still at least 2.5 cm (1 in) long.
STIHL TrimCut
WARNING
To reduce the risk of injury, always shut
off the engine before adjusting the nylon
line by hand.
N
If necessary, remove the mowing
head.
N
FS 89, FS 89 R
Pull the spool up – rotate it about 1/6
turn counterclockwise until it
engages – and allow it to spring
back.
Repeat the above procedure as
necessary until both lines reach the
limiter blade on the deflector.
Rotating the spool from one stop to the
next advances about 4 cm (1 1/2 in) of
fresh line.
Replacing Nylon Line
STIHL PolyCut
Precut lengths of nylon line can be fitted
to the PolyCut in place of the cutting
blades.
STIHL DuroCut, STIHL PolyCut
WARNING
To reduce the risk of injury, always shut
off the engine before refilling the mowing
head.
N
Fit precut lengths of nylon line in the
mowing head as described in the
instructions supplied.
Replacing Cutting Blades
STIHL PolyCut
Always check the mowing head for signs
of wear before installing new cutting
blades.
WARNING
If there are signs of serious wear,
replace the complete mowing head.
The thermoplastic cutting blades are
referred to as "blades" in the following.
Pull ends of the lines outward.
33
English
The mowing head is supplied with
illustrated instructions for replacing the
blades. Keep the instructions for the
mowing head in a safe place.
WARNING
To reduce the risk of injury, always shut
off the engine before installing the
blades.
N
Remove the mowing head.
N
Replace blades as shown in the
illustrated instructions.
N
Mount the mowing head on the
machine.
34
FS 89, FS 89 R
English
Visual inspection (condition, leaks)
X
Complete machine
Clean
Replace any damaged parts
X
Control handle
Check operation
X
Air filter
Manual fuel pump (if fitted)
Pickup body in fuel tank
X
X
Visual inspection
X
X
X
Check
X
Have repaired by servicing dealer1)
X
dealer1)
X
Have replaced by servicing dealer1)
Fuel tank
Clean
Carburetor
Check idle adjustment – the cutting
attachment must not rotate
X
X
X
X
Cooling inlets
X
Replace after every 100 operating hours
Visual inspection
X
Clean
Have cleaned by servicing dealer1)
Valve clearance
If power is low or cranking effort very
high, have valve clearance checked
and, if necessary, adjusted by servicing
dealer1)
FS 89, FS 89 R
X
X
Adjust electrode gap
Cylinder fins
Combustion chamber
X
X
Adjust idle speed
Spark plug
as required
X
X
Replace2)
Have checked by servicing
if damaged
if problem
every 12 months
monthly
weekly
after each refueling stop
before starting work
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.
after finishing work or daily
Maintenance and Care
Have cleaned after every 150 hours of
operation by servicing dealer1)
X
X
X
X
X
35
All accessible screws and nuts (not adjustRetighten
ing screws)
Anti-vibration elements
Visual inspection
Cutting attachments
Metal cutting attachments
Gearbox lubrication
Safety labels
1)
2)
36
X
Check
Have replaced by servicing
X
X
dealer1)
X
X
X
X
Check tightness
X
X
Sharpen
X
Replace
Check
X
X
X
Replenish
Replace
as required
if damaged
if problem
every 12 months
monthly
weekly
after each refueling stop
before starting work
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.
after finishing work or daily
English
X
X
STIHL recommends an authorized STIHL servicing dealer.
Only if there is a noticeable loss of engine power
FS 89, FS 89 R
English
Minimize Wear and Avoid
Damage
Observing the instructions in this 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 this owner's
manual.
servicing dealer. STIHL dealers are
regularly given the opportunity to attend
training courses and are supplied with
the necessary technical information.
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
–
Damage to the engine due to
neglect or deficient maintenance
(e.g. air and fuel filters), incorrect
carburetor adjustment or
inadequate cleaning of cooling air
inlets (intake ports, cylinder fins).
–
Corrosion and other consequential
damage resulting from improper
storage.
–
Damage to the machine resulting
from the use of poor quality
replacement parts.
–
Antivibration elements
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:
All the operations described in the
"Maintenance Chart" 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.
–
Cutting attachments (all types)
–
Mounting hardware for cutting
attachments (rider plate, nut, etc.)
–
Deflectors for cutting attachments
–
Clutch
STIHL recommends that you have
servicing and repair work carried out
exclusively by an authorized STIHL
–
Filters (air, fuel)
–
Rewind starter
FS 89, FS 89 R
Spark plug
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:
The user is responsible for all damage
caused by non-observance of the safety
precautions, operating and maintenance
instructions in this manual. This includes
in particular:
–
–
37
English
Main Parts
4
9
8
3
2
10
5
6
1
#
11
7
13
20
14
13
15
16
17
12
18
19
14
9 10
8
38
0000-GXX-0508-A0
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
#
Tank cap
Carburetor adjusting screws
Starter grip
Manual fuel pump
Cover
Muffler
Machine support
Throttle trigger
Stop switch
Throttle trigger lockout
Bike handle (handlebar)
Handle support
Throttle cable retainer
Carrying ring
Choke lever
Air filter cover
Fuel tank
Loop handle
Barrier bar
Drive tube
Serial Number
FS 89, FS 89 R
English
1
2
3
4
5
1
3
2
6
7
8
9
4
1
Drive tube
Mowing head
Deflector for mowing heads only
Line limiting blade
Deflector for all mowing
attachments
Skirt for mowing heads
Metal mowing attachment
Circular saw blade
Limit stop for circular saw blades
only
5
6
2
4
1
5
7
1
FS 89, FS 89 R
9
002BA644 KN
8
39
English
Specifications
Engine
STIHL single cylinder four-stroke engine
with mixture lubrication
Displacement:
Bore:
Stroke:
Engine power to
ISO 8893:
28.4 cc
38 mm
25 mm
0.95 kW
(1.3 bhp) at
7,000 rpm
Idle speed:
2,800 rpm
Cut-off speed (rated): 9,500 rpm
Max. output shaft
speed (cutting
attachment):
7,150 rpm
Valve clearance
Inlet valve:
0.10 mm
Exhaust valve:
0.10 mm
Electronic magneto ignition
Spark plug (resistor
type):
Bosch USR 7 AC
Electrode gap:
0.5 mm
Fuel System
All position diaphragm carburetor with
integral fuel pump
40
Vibration measurement ahv,eq to
ISO 22867
Dry, without cutting attachment and
deflector
FS 89:
5.8 kg
FS 89 R:
5.5 kg
Handle,
with mowing head left
FS 89 with bike
handle:
3.1 m/s2
FS 89 R:
4.9 m/s2
Noise and Vibration Data
For details on compliance with Vibration
Directive 2002/44/EC visit
www.stihl.com/vib.
Sound pressure level Lp to ISO 22868
with mowing head
FS 89 with bike handle:
FS 89 R:
with metal mowing
attachment
FS 89 with bike handle:
FS 89 R with barrier bar:
710 cc (0.71 l)
with mowing head
FS 89 with bike handle:
FS 89 R:
with metal mowing
attachment
FS 89 with bike handle:
FS 89 R with barrier bar:
with metal mowing attachment
FS 89 with bike
handle:
FS 89 R with barrier bar:
Handle,
right
3.1 m/s2
5.3 m/s2
Handle,
left
Handle,
right
2.7 m/s2
2.4 m/s2
3.9 m/s2
4.9 m/s2
95 dB(A)
95 dB(A)
The K-factor in accordance with
Directive 2006/42/EC is 2.0 dB(A) for
the sound pressure level and sound
power level; the K-factor in accordance
with Directive 2006/42/EC is 2.0 m/s2
for the vibration level.
93 dB(A)
93 dB(A)
REACH
Sound power level Lw to ISO 22868
Ignition System
Fuel tank capacity:
Weight
106 dB(A)
106 dB(A)
105 dB(A)
105 dB(A)
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.
Exhaust Emissions
The CO2value measured in the EU type
approval procedure is specified at
www.stihl.com/co2.
The measured CO2value was
determined on a representative engine
in accordance with a standardized test
procedure under laboratory conditions
FS 89, FS 89 R
English
The applicable exhaust emission
requirements are fulfilled by the
intended usage and maintenance
described in this instruction manual. The
type approval expires if the engine is
modified in any way.
Maintenance and Repairs
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 highquality replacement parts in order to
avoid the risk of accidents and damage
to the machine.
Disposal
Observe all country-specific waste
disposal rules and regulations.
000BA073 KN
and does not represent either an explicit
or implied guarantee of the performance
of a specific engine.
STIHL products must not be thrown in
the garbage can. Take the product,
accessories and packaging to an
approved disposal site for environmentfriendly recycling.
Contact your STIHL servicing dealer for
the latest information on waste disposal.
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).
FS 89, FS 89 R
41
English
EC Declaration of Conformity
ANDREAS STIHL AG & Co. KG
Badstr. 115
D-71336 Waiblingen
The year of manufacture and serial
number are applied to the product.
Done at Waiblingen, 28.10.2016
ANDREAS STIHL AG & Co. KG
Germany
declare in exclusive responsibility that
the product
Category:
Make:
Model:
Serial identification:
Displacement:
Brushcutter
STIHL
FS 89
FS 89 R
4180
28.4 cc
Thomas Elsner
Director Product Management and
Services
conforms to the provisions of Directives
2006/42/EC, 2014/30/EU and
2000/14/EC and has been developed
and manufactured in compliance with
the following standards in the versions
valid at the time of production:
EN ISO 11806-1, EN 55012,
EN 61000-6-1
The measured and guaranteed sound
power levels were determined according
to Directive 2000/14/EC, Annex V, using
the ISO 10884 standard.
Measured sound power level
FS 89:
FS 89 R:
106 dB(A)
106 dB(A)
Guaranteed sound power level
FS 89:
FS 89 R:
108 dB(A)
108 dB(A)
Technical documents deposited at:
ANDREAS STIHL AG & Co. KG
Produktzulassung (Product Licensing)
42
FS 89, FS 89 R
English
FS 89, FS 89 R
43
English
44
FS 89, FS 89 R
0458-460-0121-A
englisch
G
www.stihl.com
*04584600121A*
0458-460-0121-A