Stihl Fs 80 R Owners Manual

							
20 English / USAFS 80, FS 80 R, FS 85, FS 85 R
Cutting tools
  1STIHL Supercut 20-2 
  2 STIHL Autocut 25-2 
   3 STIHL Autocut C 25-2 
   4 STIHL Trimcut 30-2
   5 STIHL Polycut 20-3 
  6 STIHL FixCut 25-2
   7 Grass cutting blade 230-4
   8 Grass cutting blade 230-8
   9 Brush knife 250-3
10 Scratcher tooth circular 
saw blade 200 
11 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
12 Deflector for mowing heads  only
13 Deflector  with 
14 Skirt and blade for all mowing heads 
(see “Mounting the deflector”)
15 Deflector  without skirt and blade  
for all metal mowing tools 
16 Limit stop for circular saw blades
Handles
17Loop handle
18 Loop handle  with 
19 Barrier bar
20 Bike handle
Harnesses
21Shoulder strap may be used
22 Shoulder strap must be used
23 Full harnesss may be used
24 Full harness must be used
Equipment
The complete unit includes:
– Cutting tool
– Deflector
– Handle
– Harness (bike handle unit only)
Select the correct combination from the 
table according to the cutting tool you 
intend to use. Read the table 
horizontally from left to right. Other 
combinations, e.g. reading the table 
diagonally, are not permitted.
! Warning!
To reduce the risk of injury from thrown 
objects and blade contact, never 
operate your unit without the proper 
deflector for the cutting attachment 
being used. To reduce the risk of injury 
from loss of control 
and / or contact with the cutting tool, 
make sure your unit is equipped with a 
proper handle and harness for the type 
of cutting attachment being used.
!  Warning! 
STIHL brushcutters with a loop handle 
without barrier bar may be used only 
with the above mentioned mowing head 
with nylon line or plastic blades. Other 
plastic or metal cutting tools, but not 
circular saw blades, may be used only 
on brushcutters with a bike handle or 
loop handle with barrier bar in order to 
reduce the risk of personal injury 
through contact with the cutting tool. To 
reduce the risk of serious injury to the 
operator or bystanders by kickout, never 
use a circular saw blade on a 
brushcutter with a loop handle. Circular 
saw blades may be used only on 
brushcutters with a bike handle.
Approved Combinations of Cu tting Tool, Deflector, Handle 
and Harness 
						

							
21
FS 80, FS 80 R, FS 85, FS 85 R English / USA
Cutting tool Deflector, Limit Stop Handle Harness/Strap
681FK003
681FK006
681FK011
5 3 1681FK037 KN
4
681FK005
2
681FK111 KN6
12681FK023
681BA002 KN13
14
17002BA002 K
002BA003 K1819
002BA125 KN21
002BA001 K
20
002BA005 K22
681FK014
7
8
9
681FK02115
002BA003 K1819
002BA001 K
20002BA126 KN002BA127 KN002BA005 K2223 23
681FK018
681FK016
11
10681FK024
16
002BA001 K
20
002BA026 KN002BA006 K2424 
						

							
22 English / USAFS 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)  Not approved for use with bike- handled units
3)It is not necessary to use a shoulder 
strap :
Mount the bike handle  (1) on the 
drive tube  (2) about 16” (40 cm)  (A) 
forward of the engine. 
: Place the clamp  (3) and the handle 
support  (4) on the drive tube.
: Position the bike handle  (1) on the 
handle support – the rubber grip 
must be on the left (viewed from the 
engine)
Approved Power Tool 
Attachments
FS 85
228BA037 KN
BF
FH
FCS
KBKW
HT
Power tool 
attachment Application
BF  
1) Cultivator
FCS  
2)3) Power Edger
FH 
1) Power Scythe
HL 0° 
2) Hedge Trimmer
HL 135°  
1)2) Hedge Trimmer
(adjustable)
HT  
2) Pole Pruner
KB  (4601) 
2)   Bristle  Brush
KW  (4601) 
2) PowerSweep
KW  (4602) 
2) PowerSweep
Mounting the Bike Handle
1
3
4 5
6
A 6
2
002BA128 KN 
						

							
23
FS 80, FS 80 R, FS 85, FS 85 R English / USA
: Place the clamp  (5) on the handle 
support.
: Insert screws  (6) in the holes and 
clamp  (3) and tighten them 
moderately.
: Line up the bike handle.
: Tighten down the screws firmly.
Fitting the control handle
:Release the screw  (7). The nut  (8) 
remains  in the control handle  (9).
: Push the control handle onto the 
bike handle  (1)  – the throttle trigger 
(10 ) must point towards the 
gearhead.
: Line up the holes  (11).
: Fit screw in control handle and 
tighten down firmly. Fitting the throttle cable
Do not kink the throttle cable – make 
sure the throttle trigger moves freely!
:
Press the throttle cable  (12) into the 
retainers  (13).
Adjust the throttle cable*
On control handles with slide*:
: Go to chapter Adjusting the 
Throttle Cable
* see “Guide to Using this Manual”
117
9
10
1
11
002BA229 KN
8
12
13
12
13
13
393BA049 KN 
						

							
24 English / USAFS 80, FS 80 R, FS 85, FS 85 R
A properly adjusted throttle cable is 
the precondition for correct 
operation in the full throttle, starting 
throttle and idle positions.
Adjust the throttle cable only after 
the unit is fully assembled – the 
control handle must be in the normal 
operating position.
: Use a suitable tool to push the slide 
to the bottom of the slot (see 
illustration). :
Press down the trigger interlock ( 1) 
and squeeze the throttle trigger ( 2)  
(full throttle) – this sets the throttle 
cable correctly.
Loop handle with barrier bar
: Insert square nuts  (1) in the 
barrier bar  (2).
: Line up the holes.
Adjusting the Throttle Cable
002BA163 KN
STOP
249BA017 KN1
2
Mounting the Loop Handle
2
002BA098 KN
1
1 
						

							
25
FS 80, FS 80 R, FS 85, FS 85 R English / USA
: Place the clamp  (3) in the loop 
handle  (4) and position them both 
against the drive tube  (5).
: Fit the clamp  (6) and place the 
barrier bar  (2) in position.
Note correct position.
: Line up the holes.
: Insert screws  (7) in holes and screw 
them into the barrier bar as far as 
stop.
: Go to “Securing the loop handle”.
Loop handle without barrier bar
:Place the clamp  (3) in the loop 
handle  (4) and position them both 
against the drive tube  (5).
: Fit the clamp  (6) and line up the 
holes.
: Fit washers  (7) on screws  (8). 
: Insert screws  (8) in holes and screw 
on the square nuts  (1) as far as 
stop.
: Go to “Securing the loop handle”.
Securing the loop handle
:Secure the loop handle  (4) 
approx.  8”/20cm ( A) forward of 
the control handle  (9).
: Line up the loop handle.
: Tighten down the screws firmly – 
lock the nuts if necessary.
10= Sleeve*
* see “Guide to Using this Manual”
5
4
002BA099 KN
2
3
6 7
4
5
002BA136 KN
1
6
1
3 8
78
7
10
9
4
002BA147 KN
A 
						

							
26 English / USAFS 80, FS 80 R, FS 85, FS 85 R
:
For position of carrying eye
1) see 
Parts and Controls
: Place the clamp  (1) with the 
tapped hole on the left-hand side  
of the drive tube.
: Squeeze the two ends of the clamp 
together and hold in that position.
: Insert M 6 x 14 screw  (2).
: Line up the carrying eye.
: Tighten down the screw firmly.
1) Included as standard or available as  special accessoryMounting the deflector
1 = Deflector approved  for all cutting 
tools
2 = Deflector approved  for use with 
mowing heads only
: Place the deflector on the 
gearhead.
: Fit the plate ( 3) and line it up.
: Insert M 5 x 18 screws and tighten 
down firmly.
Fitting skirt and blade
These parts must be fitted to the 
deflector ( 1) when you use a 
mowing head:
: Slide the  lower guide slot of the 
skirt ( 4) onto the deflector ( 1) – it 
must snap into position.
: Push the blade ( 5) into the  upper 
guide slot on the skirt and line it up 
with the first hole.
: Fit the screw and tighten it down 
firmly.
Fitting the Carrying Eye
002BA142 KN
1
2
1
Mounting the Deflector
002BA102 KN
1
3
2 3
4 1
5 4
002BA103 KN 
						

							
27
FS 80, FS 80 R, FS 85, FS 85 R English / USA
Mounting the stop
:
Always fit stop  (6) when you use a 
circular saw blade.
: Place the stop on the gearhead 
flange.
: Fit the three M 5 x 18 screws  (7) and 
tighten down securely.
Preparations
: Lay your brushcutter on its back 
with the gearhead facing upward.
Mounting Hardware 
for Cutting Tools
The mounting hardware supplied 
depends on the cutting tool that comes 
as original equipment with the new 
brushcutter.
Mounting hardware is not packed 
with the machine
Only mowing heads may be 
mounted. :
Pull the hose ( 1) (protector for 
shipping) off the shaft ( 2).
: Go to Mounting the Mowing Head.
If you want to mount a metal cutting 
tool in place of a mowing head, you 
will need the following additional 
parts: Nut ( 3), rider plate ( 4) and 
thrust washer ( 5) (special 
accessories).
77
7
6
002BA028 KN
Mounting the Cutting Tools
002BA104 KN
2
002BA164 KN
1 3
4 5 
						

							
28 English / USAFS 80, FS 80 R, FS 85, FS 85 R
Mounting hardware is packed with 
the machine
Mowing heads and metal cutting 
tools may be mounted.
Mounting hardware is loose
: Pull the hose ( 1) (protector for 
shipping) off the shaft ( 2).
The nut ( 3), rider plate ( 4) and thrust 
washer ( 5) are in the parts kit 
supplied with the machine.
: Go to Mounting the Mowing Head 
or Mounting Metal Cutting Tools.
Mounting hardware is secured to  
gearhead
: Go to Removing Mounting 
Hardware
Removing Mounting Hardware
:Block the shaft – see next section 
on Blocking the Output Shaft.
: Use the combination wrench ( 6) 
(supplied with machine or available 
as special accessory) to unscrew 
the nut ( 3) clockwise (left-hand 
thread) from the shaft ( 2).
: Pull the thrust washer ( 5) off the 
shaft ( 2).  The rider plate (
4) is in the parts kit 
supplied with the machine.
: Go to Mounting the Mowing Head 
or Mounting Metal Cutting Tools.
Blocking the Output Shaft
:Insert the stop pin or screwdriver ( 7) 
(supplied with machine or available 
as special accessories) in the hole 
( 8 ) in the gearhead as far as stop – 
apply slight pressure.
: Rotate nut or cutting tool on the 
shaft ( 2) until the stop pin slips into 
position and blocks the shaft.
7
8 2002BA166 KN7 
						

							
29
FS 80, FS 80 R, FS 85, FS 85 R English / USA
Mounting the Mowing Head
Keep instruction sheet for mowing head 
in a safe place.
:
Screw the
STIHL SuperCut 20-2, 
STIHL AutoCut 25-2, 
STIHL AutoCut C 25-2,
STIHL TrimCut 30-2, 
STIHL PolyCut 20-3
counterclockwise onto the shaft ( 1) 
as far as stop.
: Block the output shaft.
: Tighten down the mowing head.
Remove the tool used to block the 
shaft. STIHL FixCut 25-2
:
Place the mowing head on the 
thrust plate ( 2).
Collar ( arrows ) must locate in the 
mowing head’s mounting hole
: Push the thrust washer ( 3) over the 
shaft ( 1) so that it locates against 
the base.
: Block the output shaft.
: Screw the mounting nut ( 4) with the 
combination wrench  ( 5 ) 
counterclockwise on to the output 
shaft and tighten down firmly.
Remove the tool used to block the 
shaft.
Removing the Mowing Head
: Block the output shaft.
STIHL SuperCut 20-2, 
STIHL AutoCut 25-2, 
STIHL AutoCut C 25-2, 
STIHL TrimCut 30-2, 
STIHL PolyCut 20-3
: Unscrew the mowing head 
clockwise.
STIHL FixCut 25-2
: Use the combination wrench to 
unscrew the mounting nut clockwise 
from the output shaft
If the mounting nut is too loose, fit a 
new one
Adjusting Nylon Line
STIHL SuperCut
Fresh line is advanced automatically if 
remaining line is still  min. 2 1/2 (6 cm) 
long. The blade on the deflector trims 
overlong line to the correct length.
1
002BA081 KN