Stihl FS 80 User manual

Instruction Manual
STIH)
STIHL FS 80, 85
BA_FS80_01_U_M4.book Seite 0 Dienstag, 23. November 2004 10:34 10

1FS 80, FS 80 R, FS 85, FS 85 R
English
BA_SE_039_006_01_13.fmPrinted on chlorine-free paper.
Printing inks contain vegetable oils; paper can be recycled.
© ANDREAS STIHL AG & Co. KG, 2008 0458 393 0121. M2. K8. FST. Printed in Germany
STIHl
Contents
Guide to Using this Manual .............. 2
Safety Precautions and
Working Techniques ......................... 3
Approved Combinations
of Cutting Tool, Deflector,
Handle and Harness ....................... 14
Approved
Power Tool Attachments ................. 16
Mounting the Bike Handle .............. 16
Adjusting the Throttle Cable ........... 20
Mounting the Loop Handle ............. 20
Fitting the Carrying Eye .................. 22
Mounting the Deflector ................... 22
Mounting the Cutting Tools ............. 23
Fuel ................................................ 27
Fueling ............................................ 28
Fitting the Harness ......................... 29
Balancing the Brushcutter .............. 30
Starting / Stopping
the Engine ...................................... 31
Operating Instructions .................... 34
Cleaning the Air Filter ..................... 34
Adjusting the Carburetor ................ 35
Spark Arresting Screen
in Muffler ........................................ 37
Checking the Spark Plug ................ 37
Lubricating the Gearbox ................. 38
Replacing the Starter Rope
and Rewind Spring ......................... 38
Storing the Machine ....................... 41
Sharpening
Metal Cutting Tools ......................... 41
Maintenance Chart ......................... 43
Minimize Wear and
Avoid Damage ................................ 45
Main Parts and Controls ................. 46
Specifications ................................. 48
Special Accessories ....................... 50
Maintenance and Repairs .............. 51
Certificate of Conformity ................. 51
Quality Certification ........................ 52
Dear Customer,
Thank you for choosing a quality
engineered STIHL product.
This machine has been built using
modern production techniques and
comprehensive quality assurance.
Every effort has been made to ensure
your satisfaction and troublefree use
of the machine.
Please contact your dealer or our
sales company if you have any
queries concerning your machine.
Hans Peter Stihl

2
English
FS 80, FS 80 R, FS 85, FS 85 R
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) ...
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.
Guide to Using this Manual

3FS 80, FS 80 R, FS 85, FS 85 R
English
Because a brushcutter is
a high-speed, fast-cutting
power tool, special safety
precautions must be
observed to reduce the
risk of personal injury.
It is important that you
read and understand the
instruction manual before
using your brushcutter for
the first time and keep it in
a safe place for later
reference. Non-observance of the safety
precautions may result in serious or
even fatal injury.
Always observe local safety regulations,
standards and ordinances.
If you have never used this brushcutter
model before: Have your dealer or other
experienced user show you how to
operate your brushcutter or attend a
special course of training in brushcutter
operation.
Minors should never be allowed to use a
brushcutter.
Bystanders, especially children, and
animals should not be allowed in the
area where a brushcutter is in use.
When the machine is not in use (work
break), shut it off so that it does not
endanger others and secure it against
unauthorized use.
The operator is responsible for avoiding
injury to third parties or damage to their
property.
Do not lend or rent your brushcutter
without the instruction manual. Be sure
that anyone using your brushcutter
understands the information contained
in this manual.
You must be rested, healthy and in good
physical condition to operate a power
tool.
If you have any condition that may be
aggravated by strenuous work, check
with your doctor before operating a
brushcutter.
Persons with pacemakers only: The
ignition system of your unit produces an
electromagnetic field of a very low
intensity. This field may interfere with
some pacemakers. To reduce health
risks of serious, STIHL recommends
that persons with pacemaker consult
their physician and the pacemaker
manufacturer before operating this tool.
Do not operate this power tool while
under the influence of any substance
(drugs, alcohol) which might impair
vision, dexterity or judgment.
Depending on the cutting tool fitted, use
your brushcutter only for cutting grass,
wild growth, shrubs, scrub, bushes,
small diameter trees and similar
materials.
Do not use your brushcutter for any
other purpose since this may result in
accidents or damage to the machine.
Never attempt to modify your
brushcutter in any way since this may
also result in accidents or damage to the
machine.
Safety Precautions and
Working Techniques

4
English
FS 80, FS 80 R, FS 85, FS 85 R
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
specialist dealer. To reduce the risk of
accidents or damage to the machine,
use only high quality tools and
replacement parts.
STIHL recommends the use of STIHL
original tools and accessories. The
characteristics of these components are
specifically designed to match your
machine and meet your performance
requirements.
The deflector provided with your
machine may not protect the operator
from all foreign objects (stones, glass,
wire, etc.) thrown by the rotating cutting
attachment. Thrown objects may also
ricochet and strike 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 is
recommended, do not wear a coat.
Do not wear loose-fitting garments,
scarves, jewelry or anything that could
restrict movement or become entangled
with wood, brush or moving parts of the
machine. 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.
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. To
reduce the risk of injury from thrown
objects, always wear a face shield and
safety glasses.
Warning! A face shield alone does not
provide adequate eye protection.
Wear hearing protection, e.g. ear plugs
or ear muffs.
Wear heavy-duty
gloves, preferably made
of leather.
STIHL offers a comprehensive range of
safety clothing and equipment.

5FS 80, FS 80 R, FS 85, FS 85 R
English
Transporting the Unit
Always turn off the engine.
Carry the unit hanging from the shoulder
strap or properly balanced by the drive
tube. Fit transport guard on metal cutting
tools to avoid the risk of injury from blade
contact.
Transporting by vehicle: When
transporting in a vehicle, properly secure
your brushcutter to prevent turnover, fuel
spillage and damage.
Fueling
Gasoline is an
extremely flammable
fuel. Keep clear of naked
flames and fire. Do not
spill any fuel – do not
smoke.
Stop the engine before refueling.
Do not refuel while the engine is still hot
since fuel may overflow and catch fire.
Open the fuel cap carefully to allow any
pressure build-up in the tank to release
slowly.
Fuel your brushcutter in a well-ventilated
area, outdoors only. If you spill fuel, wipe
the machine immediately – if fuel gets on
your clothing, change immediately.
Different models may be equipped with
different fuel caps.
After fueling, tighten down
the screw-type fuel cap as
securely as possible.
Insert the fuel cap with
hinged grip (bayonet type
cap) correctly in the
opening, turn it clockwise
as far as stop and fold the
grip down.
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.
002BA079 KN

6
English
FS 80, FS 80 R, FS 85, FS 85 R
Before Starting
Check that your power tool is properly
assembled and in good condition – refer
to appropriate chapters in the instruction
manual:
– Use only an approved combination
of cutting tool, deflector, handle and
harness. All parts must be
assembled properly and securely.
– Slide control /stop switch must
move easily to STOP or 0.
– Smooth action of throttle trigger and
throttle trigger interlock (where
fitted) – throttle trigger must return
automatically to idle position.
– Check that spark plug boot is secure
– a loose boot may cause arcing
that could ignite combustible fumes
and cause a fire.
– Cutting tools and attachments:
Check for correct and secure
assembly and good condition.
– Check protective devices (e.g.
deflector for cutting tool, 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).
– Never attempt to modify the controls
or safety devices
– Keep the handles dry and clean –
free from oil and pitch – for safe
control
– Adjust harness and handle(s) to suit
your height and reach. See chapter
on "Fitting the Harness – Balancing
the Brushcutter"
To reduce risk of personal injury, do not
operate your machine if it is damaged or
not properly assembled.
If you use a shoulder strap or full
harness: Practise removing and putting
down the machine as you would in an
emergency. To avoid damage, do not
throw the machine to the ground when
practising.
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 footing. Hold the unit securely. The
cutting tool must be clear of the ground
and all other obstructions because it
may rotate when the engine starts.
Your brushcutter 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.
To reduce the risk of
injury, avoid contact with
the cutting tool.
Do not drop start the
engine. The correct
starting procedure is
described in your
instruction manual. Note
that the cutting tool
continues to rotate for a short period
after you let go of the throttle trigger –
flywheel effect.
Check idle speed: The cutting tool 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).

7FS 80, FS 80 R, FS 85, FS 85 R
English
Holding and Controlling the Unit
Always hold the machine firmly with
both hands on the handles. Make sure
you always have a firm footing.
Models with bike handle
Right hand on control handle, left hand
on left handle.
Models with loop handle
On units 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
In the event of impending danger or in
an emergency, switch off the engine
immediately by moving the slide control
/ stop switch to 0or d.
To reduce the risk of personal injury from
thrown objects, do not allow any other
persons within a radius of 15 meters of
your own position.
Also maintain this distance from to
reduce the risk of damage to property
(parked vehicles, windows).
The correct engine idle speed is
important to ensure that the cutting tool
stops rotating when you let go of the
throttle trigger.
Check and correct the idle speed
adjustment regularly. If the cutting tool
still rotates at idle speed, have your
dealer make proper adjustments and
repairs.
Take special care in slippery conditions
– damp, snow, ice, on slopes, uneven
ground, etc.
Avoid stumbling on stumps, roots, rocks
or in ditches.
Ensure you always have a firm and safe
footing.
Be particularly alert and cautious when
wearing hearing protection because
your ability to hear warnings (shouts,
alarms, etc.) is restricted.
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 – ensure you do not endanger
others – stay alert at all times.
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.
002BA055 KN
002BA080 KN
15m (50ft)

8
English
FS 80, FS 80 R, FS 85, FS 85 R
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.
Operate your power tool so that it
produces a minimum of noise and
emissions – do not run engine
unnecessarily, accelerate the engine
only for cutting.
To reduce 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 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, have the
machine checked by your servicing
dealer.
Do not operate your brushcutter with the
starting throttle lock engaged. Engine
speed cannot be controlled with the
throttle trigger in this position.
To reduce the risk
of personal injury
from thrown
objects, never
operate the unit
without the proper deflector for the type
of cutting tool being used.
Before cutting, inspect the
area for stones, glass,
pieces of metal or other
solid objects which could
damage the cutting tool or
be thrown and cause
damage to property (e.g. parked
vehicles, windows).
Special care must be taken when
working in difficult, over-grown terrain.
When cutting high scrub, under bushes
and hedges: Keep cutting tool at
minimum height of 15 cm to avoid
harming small animals (e.g.
hedgehogs).
Always shut off the engine before
leaving the unit unattended.
Check the cutting tool at regular short
intervals. If behavior of cutting tool
changes, check it immediately:
– Turn off the engine. Hold
brushcutter firmly and press the
cutting tool into the ground to bring
it to a standstill.
– Check condition – look for cracks.
– Check sharpness.
– Replace damaged or dull cutting
tools immediately, even if they have
only superficial cracks. Perform
ringing test on metal cutting tools.

9FS 80, FS 80 R, FS 85, FS 85 R
English
Clean grass and plant residue off the
cutting tool mounting at regular intervals.
If the cutting tool or deflector becomes
clogged or stuck, always turn off the
engine and make sure the cutting tool
has stopped before cleaning.
To reduce the risk of unintentional
engine start and injury, always shut off
the engine and remove the spark plug
boot before replacing the cutting tool.
Never repair damaged or cracked
cutting tools by welding, straightening or
modifying the shape (out of balance).
This may cause parts of the cutting tool
to come off and hit the operator or
bystanders at high speed and result in
serious or fatal injuries.
When using mowing heads
Equip the standard deflector with the
additional component specified in the
instruction manual.
Use only the deflector with properly
mounted line limiter blade to ensure that
the mowing lines are automatically
trimmed to the approved length.
To reduce the risk of injury, always turn
off the engine before adjusting manually
adjustable mowing heads.
Using the unit with over-long nylon
cutting lines increases the load on the
engine and reduces its operating speed.
This causes the clutch to slip
continuously and results in overheating
and damage to important components
(e.g. clutch, polymer housing
components). There is also a risk of
injury from the cutting tool rotating while
the engine is idling.
When using metal cutting tools
Sharpen metal cutting tools regularly as
specified. Dull or improperly sharpened
cutting edges can put a higher load on
the cutting tool and increase the risk of it
cracking or shattering.
Vibrations
Prolonged use of the unit 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)
–breaks
The period of usage is shortened by:
– Any personal tendency to suffer
from poor circulation (symptoms:
frequently cold fingers, itching).
– Low outside temperatures.
– Gripping force (a tight grip hinders
circulation).
Continual and regular users should
monitor closely the condition of their
hands and fingers. If any of the above
symptoms appear, seek medical advice.

10
English
FS 80, FS 80 R, FS 85, FS 85 R
Maintenance and repairs
The machine must be serviced regularly.
Do not attempt any maintenance or
repair work not described in your
Owner’s Manual. All other work should
be carried out by a servicing dealer.
STIHL recommends that maintenance
and repair work be carried out only by
authorized STIHL dealers. STIHL
dealers receive regular training and are
supplied with technical information.
Use only high-quality replacement parts,
in order to avoid the risk of accidents or
damage to the machine. Contact a
dealer if in doubt.
STIHL recommends the use of genuine
STIHL spare parts. Such parts have
been optimized for the machine and the
user's requirements.
Before starting any maintenance or
repair work and before cleaning the
machine, always stop the engine and
disconnect the spark plug boot to
avoid all risk of injury if the engine
starts up inadvertently. – Exception:
adjustment of carburetor and idle speed.
Do not service or store the machine near
a naked light – risk of fire due to the
fuel.
Check fuel cap regularly for tightness.
Use only the spark plugs approved by
STIHL – see Specifications.
Inspect ignition lead (insulation in good
condition, secure connection).
To re d u c e t h e risk of fire due to ignition
outside the cylinder, move the slide
control / stop switch to STOP or 0before
turning the engine over on the starter
with the spark plug boot removed or the
spark plug unscrewed.
Check that the muffler is in perfect
working condition.
Do not use the machine if the muffler is
damaged or missing – risk of fire! –
Hearing damage!
Do not touch the hot muffler – risk of
burns!
The condition of the anti-vibration
buffers influences the machine's
vibrations – they must be examined
regularly.
Symbols on Deflectors
An arrow on the deflector shows the
correct direction of rotation of the cutting
tools.
Use deflector in
combination with
mowing heads
only. Do not use
metal cutting tools.

11FS 80, FS 80 R, FS 85, FS 85 R
English
Harness / Shoulder Strap*
:Use a harness.
:With the engine running, attach the
machine to the harness.
Grass cutting blades and brush
knives must be always be used in
combination with a shoulder strap.
Circular saw blades must always be
used in combination with a quick-release
full harness.
* see "Guide to Using this Manual"
Mowing Head with Nylon Line
Nylon line achieves a soft cut for edging
and trimming around fence posts, trees,
etc. – less risk of damaging tree bark.
To reduce the risk of injury, never
use steel wire in place of the nylon
cutting line.
STIHL PolyCut Cutting Head with
Plastic Blades
The PolyCut is used for edging fields not
bordered by posts, fences, trees or other
obstacles.
Check wear limit marks!
If one of the marks on the PolyCut is
worn through (arrow): To reduce the risk
of injury from thrown parts, stop using
the head immediately. Install a new
one.
It is important to follow the maintenance
instructions for the PolyCut cutting head!
000BA015 KN
002BA177 KN

12
English
FS 80, FS 80 R, FS 85, FS 85 R
Risk of Kickout (Blade Thrust)
with Metal Cutting Blades
When using metal cutting tools (grass
cutting blade, brush knife, shredder
blade, circular saw blade) there is a risk
of kickout when the shaded area of the
rotating blade comes into contact with a
solid object like a tree trunk, branch, tree
stump, rock or similar. The machine is
thrown to the right or to the rear.
The risk of kickout is greatest when
the black area of the rotating blade
comes into contact with a solid object.
Grass Cutting Blade
Use for cutting 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 cutting blade according
to instructions when it has dulled
noticeably.
Brush Knife
Suitable for cutting matted grass, wild
growth and scrub, thinning young stands
with a maximum stem diameter of 2 cm.
To reduce the risk of personal injury,
never attempt to cut thicker wood.
To cut wild growth and scrub, lower the
brush knife down onto the growth to
achieve shredding effect – do not use
the cutting tool above waist height.
Exercise extreme caution when using
this method of cutting. The higher the
cutting tool is off the ground, the greater
the risk of cuttings being thrown
sideways and causing injury.
Use the brushcutter like a scythe (sweep
it to the right and left) at ground level
when cutting grass and thinning young
stands.
002BA135 KN
000BA020 KN
002BA066 KN

13FS 80, FS 80 R, FS 85, FS 85 R
English
Warning! Improper use of a brush knife
may cause it to crack, chip or shatter.
Thrown parts may injure the operator or
bystanders.
To reduce the risk of personal injury it is
essential to take the following
precautions:
– 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.
– 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
(when it has dulled noticeably) and
have it balanced if necessary (by
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.
Use circular saw blades only with a
matching limit stop of the correct
diameter.
To reduce the risk of blade damage,
avoid contact with stones and the
ground.
Resharpen the blade properly in
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
The risk of kickout is highest in the black
area 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.
To reduce the risk of kickout, always
start the cut using the non-shaded area
of the the circular saw blade.
002BA068 KN

14
English
FS 80, FS 80 R, FS 85, FS 85 R
Cutting tools
1 STIHL Supercut 20-2
2 STIHL Autocut 25-2
3STIHL Autocut C 25-2
4STIHL Trimcut 30-2
5STIHL Polycut 20-3
6STIHL FixCut 25-2
7Grass cutting blade 230-2
8 Grass cutting blade 230-4
9 Grass cutting blade 230-8
10 Grass cutting blade 250-40 Spezial
11 Brush knife 250
12 Scratcher tooth circular
saw blade 200
13 Chisel tooth circular
saw blade 200
Grass cutting blades, brush knifes and
circular saw blades made of any other
non-metal material are not permitted.
Deflectors, Limit Stop
14 Deflector for mowing heads only
15 Deflector with
16 Skirt and blade for all mowing heads
(see “Mounting the deflector”)
17 Deflector without skirt and blade
for all metal mowing tools
18 Limit stop for circular saw blades
Handles
19 Loop handle
20 Loop handle with
21 Barrier bar
22 Bike handle
Harnesses
23 Shoulder strap may be used
24 Shoulder strap must be used
25 Full harness may be used
26 Full harness must be used
Equipment
Among other parts, the complete unit
includes:
– Cutting tool
– Deflector
– Handle
–Harness
Approved combinations
Select correct combination from the
table on the next page on basis of the
cutting tool.
For safety reasons only the tools,
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 and personal injury.
Mowing heads (1, 2, 3, 4, 5 and 6) may
only be used on bike handle or loop
handle brushcutters.
Grass cutting blades (metal, 7, 8, 9
and 10) may only be used on bike
handle brushcutters or loop handle
brushcutters with barrier bar.
Brush knives (metal; 11) may only be
used on bike handle brushcutters or loop
handle brushcutters with barrier bar.
Circular saw blades (metal; 12 and 13)
may only be used on bike handle
brushcutters.
To reduce the risk of personal
injury, take special care to avoid
contact with the rotating cutting tool.
Approved Combinations of Cutting Tool, Deflector, Handle
and Harness

15FS 80, FS 80 R, FS 85, FS 85 R
English
Cutting tool Deflector, Limit Stop Handle Harness/Strap
681FK003
681FK011
5
1
3
681FK111 KN
6
681FK006
2
681FK037 KN
4
14
681FK023
681BA002 KN
15
16
19
002
BA002 K
002BA003 K
20
21
0
02BA125 KN
23
002BA235 KN
22
002BA005 K
24
7
681FK014
9
10 11
8
681FK021
17
0
02BA003 K
20
21
22
002BA235 KN
0
02BA126 KN
002BA127 KN
25
0
02BA005 K
24 25
681FK018
681FK016
13
12
681FK024
18
22
002BA235 KN
0
02BA026 KN
002BA006 K
26 26

16
English
FS 80, FS 80 R, FS 85, FS 85 R
Power tool attachments are not
approved for the STIHL FS 80.
The following STIHL attachments may
be mounted to the basic power tool:
1) Barrier bar must be fitted on the
loop handle
2) Unsuitable for bike-handled units
3) Limited suitability for bike-handled
units
4) It is not necessary to use a shoulder
strap
5) Use the handle hose supplied with
the machine.
Removing Clamp Moldings
:Hold the lower clamp (1) and upper
clamp (2) firmly.
:Release the wing screw (3).
The clamps are loose once the wing
screw has been released. They are
pushed apart by the two springs (4
and 5).
:Pull out the wing screw.
The washer (6) remains on the wing
screw.
:Separate the clamps.
Springs (4) and (5) remain in the
lower clamp.
Approved Power Tool
Attachments
FS 85
228BA036 KN
BF
SP
HT
FH
FCS
Power tool
attachment Application
BF 1) Cultivator
FCS 3)4) Power Edger
FH 1) Power Scythe
HL 0° 2) Hedge Trimmer
HL 135° 1)3) Hedge Trimmer
(adjustable)
HT 2) Pole Pruner
SP 5) Special harvester
Mounting the Bike Handle
V
ersion with Swiveling Handle
Support

17FS 80, FS 80 R, FS 85, FS 85 R
English
Mounting the Handlebar
:Place the handlebar (7) in the lower
clamp (1) so that distance Ais no
more than 15 cm (6 in).
:Place the upper clamp in position
and hold both clamps together.
:Push the wing screw through the
two clamps as far as stop – hold all
parts together and secure them.
:Place the secured assembly on the
handle support (8) with the wing
screw at the engine side.
:Push the wing screw into the handle
support as far as stop and then
screw it down – but do not finally
tighten yet.
:Line up the handlebar at a right
angle to the drive tube – check
dimension Aagain.
:Tighten down the wing screw firmly.
Mounting the Control Handle
:Loosen the screw (9) and remove it.
The nut (10) remains in the control
handle (11).
:Push the control handle – throttle
trigger (12) must point towards the
gearbox – onto the handlebar (7) so
that the holes (13) line up.
:Insert screw with washer and
tighten down firmly.
1
7
A
250BA041 KN
1
7
A
250BA046 KN
250BA042 KN
8

18
English
FS 80, FS 80 R, FS 85, FS 85 R
Fitting the Throttle Cable
Do not kink the throttle cable or lay
it in tight radii – make sure the
throttle trigger moves freely.
:Push the throttle cable (14) into the
retainers (15).
Throttle Cable Adjustment*
On control handles with slide*:
:Go to chapter on "Adjusting the
Throttle Cable".
* see "Guide to Using this Manual”
Swiveling the Handlebar
Transport position:
:Release the wing screw (3) and
unscrew it until the handlebar (7)
can be turned clockwise.
:Turn the handlebar 90° and then
then swing the handles down.
:Tighten down the wing screw firmly.
Working position:
:Reverse the sequence described
above to swing the handles up
and turn the handlebar counter-
clockwise.
Mounting the Handlebar
:Mount the handlebar (1) on the drive
tube (2) about 40 cm/16 in (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).
15
14
15
14
15
250BA002 KN
7
250BA045 KN
90°
3
V
ersion with Fixed Handle
Support
1
3
4
5
6
A
6
2
002BA128 KN

19FS 80, FS 80 R, FS 85, FS 85 R
English
:Place the clamp (5) on the handle
support.
:Insert the screws (6) through the
holes in the parts and screw them
into clamp (3) as far as stop .
:Line up the handlebar.
:Tighten down the screws firmly.
Mounting the Control Handle
:Loosen the screw (7) and remove it.
The nut (8) remains in the control
handle (9).
:Push the control handle onto the
handlebar (1) – the throttle trigger
(10) must point toward the
gearhead.
:Line up the holes (11).
:Fit screw in the control handle and
tighten down firmly.
Fitting the Throttle Cable
Do not kink the throttle cable or lay
it in tight radii – make sure the
throttle trigger moves freely.
:Press the throttle cable (12) into the
retainers (13).
Throttle Cable Adjustment
:Go to chapter on "Adjusting the
Throttle Cable".
11
7
9
10
1
11
002BA229 KN
8
12
13
12
13
13
393BA049 KN