Stihl 108 User Guide

							MountingtheBike Handle
12
11
12
3 3,4iIIII
~5
~
8
6§
J
7
.10
The
handle support(2)ismounted on
the drive tube(1).
• Take outthe4screws
(3) ­remove theclamp (4).
• Place thebike handle
(5)intheand
position theclamp
(4)onthe handle
support.
• Line upholes
inclamp and
handle support.
• Insert thescrews asfar asstop.
• Line upthe bike handle.
•
Tightenthe screws firmly. Fitting
thecontrol handle
• Remove thescrew
(6)from thenut(7).
• Take bothparts outofthe
control handle(8).
• Push thecontrol handle
onto thebike handle
(5)­
throttle trigger(9)must
point
indirection ofgear head.
• Line upthe holes
(10).
• Fitnut and screwinthe
control handle.
•
Tightenthe screw firmly. Fitting
thethrottle cable
Do not kink thethrottle cable
- make surethethrottle trigger
moves freely.
• Push thethrottle cable
(11)
iAtotheretainers (12).
20 
						

							MountingLoopHandle with
Standoff Lever
~
-A-
,......,
1
~~.0~
02r
~
c.2..~
•Mounttheloophandle(1)with
standoff lever20cm/8
(A)forward
of the control handle(2).
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							4
OnFS88
• Place theclamp(5)inthe loop
handle (1).
•
PlaE:epacking sleeve(7)onthe drive tube(6).
• Fitthe clamp
(8)and place standoff
lever(4)inposition -
line upthe holes.
• Insert screws
(9)inholesand
screw themintostandoff lever
fingertight.
• Align theloop handle.
• Tighten thescrews firmly.
22
Mounting theLoop Handle
Version A
At;)
A
1
o
o
•Mount theloop handle(1)
20cm/8(A)forward ofthe
control handle(2).
OnFS108
• Place theclamp(3)inthe loop
handle
(1)and position them both
against thedrive tube
(4)
•Fitthe clamp(5)­line upthe holes.
• Insert screws
(6)inholesand
~.screw onthe nuts(7)fingertight.
• Align theloop handle.
• Lock thenuts andtighten
the screws firmly. 
						

							~034 5
~6
8([JJ([JJ8
OnFS88
• Place theclamp(3)inthe loop
handle (1).
• Place packing sleeve
(5)onthe drive tube(4).
• Fitthe clamp
(6)­line upthe holes.
• Insert screws
(7)inholesand
screw onthe nuts(8)fingertight.
• Align theloop handle.
• Lock thenuts andtighten
the screws firmly.
MountingtheLoopHandle
Version B
•Mount theloop handle(1)
20cm/8(A)forward ofthe
control handle(2). •
Place theclamp(3)inthe loop
handle (1).
OnFS88
• Place packing sleeve(5)onthe drive tube(4).-
OnFS108
• Place bothparts onthe
drive tube(4).
• Fitthe clamp
(6)and make sure
that theholes lineup.
• Insert thescrews
(7)asfar asstop.
• Line upthe loop handle and
tighten thescrews firmly.
23 
						

							MountingtheDeflector
1
3~
4
Mountingthedeflector
• Place either deflector(1)forall
cutting tools
or
deflector(2)formowing heads
on the gearhead flange.
• Fitthe plate
(3)and lineitup.
• Insert M 5 x18screws andtighten
down securely.
24
Fitting skirtandblade
•Slide thelowerguide slotofthe
skirt(4)over thedeflector(1)-
itmust snap intoposition.
• Push blade
(5)intotheuppergUide
on
theskirt andlineitup with the
first hole.
• Fitthe screw andtighten
itdown
firmly.
Fitting stop-
for circular sawblades
•Remove standard deflector.
Place thestop
(1)onthe gear
head flange -fit the three
M 5 x 18screws
(2)provided
and tighten downsecurely. 
						

							MountingtheCutting Tools
8
6 \
f
\
\
1t
[
•
Layyour brushcutter onitsback
with thegear head facing up.
Blocking theoutput shaft
•Insert stoppin(1)inthe bore(2)at
the side ofthe gear head asfar as
stop -apply slightpressure.
• Rotate outputshaftuntilthestop
pin slips intoposition andblocks the
shaft.
Removing cuttingtoolmounting
hardware
• Position combination wrench(3)
onthe mounting nut(4).
• Release andunscrew thenut
clockwise (left-handthread). •
Remove shipping keeper
(5)­iffitted.
• Pulltherider plate
(6)and
thrust washer(7)off
the shaft (8).
• Now fitthe cutting tool.
25 
						

							STIHLSupercut 2-2
STIHL Supercut 20-2
•Layyour brushcutter onitsback
with thegear head facing up.
• Screw mowing headcounterclock­
wise ontotheoutput shaft
(1)-
asfar asitwill go.
• Block theoutput shaft.
• Tighten downthemowing head
securely.
Important!
Remove thestop pin.
Keep instruction sheetformowing
head inasafe place.
26
Removing mowinghead
•Block theoutput shaft.
• Unscrew mowingheadclockwise.
Adjusting nylonline
•Fresh lineisadvanced auto­
matically, providingatleast
6cm/2.4oflineisstill projecting
from thehead.
Blade ondeflector trimssurplus line
to correct length.
• Fitnew nylon lineasdescribed
ininstructions suppliedwithmowing
head.
STIHL Autocut 25-2
STIHL Autocut 30-2
•Layyour brushcutteronitsback
with thegear head facingup.
•Screw mowing headcounterclock­
wise ontotheoutput shaft(1)-
asfar asitwill go.
• Block theoutput shaft.
--.Tighten downthemowing head
securely.
Important!
Remove thestop pin.
Removing mowinghead
•Block theoutput shaft.
• Unscrew mowingheadclockwise.
Keep instruction sheetformowing
head inasafe place. 
						

							Adjustingnylonline
•Hold therotating mowing head
horizontal abovetheground ­
tap
iton the ground -
about
3cm/1 1/4freshlineis
advanced-blade ondeflector trims
surplus line
tothecorrect length­
avoid tapping headmore than
once.
• Line feed operates onlyifboth lines
still have a
minimum lengthof
2.Scm/1.
•Fitnew nylon lineasdescribedin
instructions suppliedwithmowing
head.
c;-2
1
3
4
c
I~
STIHL Autocut 24-2
STIHLPolymatic 30-2
•Layyour brushcutter onitsback
with thegear head facing up.
• Sliptheplain washer
(1)and
thrust washer(2)overthe
shaft
(3)and against the
thrust plate(4).
• Screw mowing headcounterclock­
wise ontotheoutput shaft-
as far as
itwill go.
• Block theoutput shaft.
• Tighten downthemowing head
securely.
Important!
Remove thestop pin.
Keep instruction sheetformowing
head inasafe place.
Removing mowinghead
•Block theoutput shaft.
•
Uns.f.rewmowing headclockwise.
Adjusting nylonline
•Refer toinstruction sheetsupplied
with mowing head.
27 
						

							1
~4
-=2
STIHLPolycut 40-3
STIHLFixedLineHead
•
• •
•
•
•Lay your brushcutter onitsback
with thegear head facing up.
Remove ring(1)from themowing
head. Position thehead onthe thrust
plate (2).
Slip thethrust washer (3)over the
output shaft(4).
Block theoutput shaft.
Screw mounting nut(5)counter­
clockwise ontothe output shaftand
tighten
itdown firmly.
Important!
Remove thestop pin.
Releasing mountingnut
•Block theoutput shaftand
unscrew themounting nut
clockwise.
Ifthe mounting nutbecomes slackdue
to frequent loosening andretightening,
fit anew one.
Replacing cuttingblades
•Refer toinstruction sheetsupplied
with fixed linehead.
•
•
•
....,..
•
Lay your brushcutter onitsback
with thegear head facing
up.
Place mowing headonthe thrust
plate (1).
Slip thethrust washer (2)
over theoutput shaft(3).
Block theoutput shaft.
Screw mounting nut(4)counter­
clockwise on
tooutputshaftand
tighten downsecurely.
Important!
Remove thestop pin.
Keep instruction sheetformowing
head inasafe place.
28
Keep instruction sheetformowing
head inasafe place. 
						

							t
l
Releasingmountingnut
•Block theoutput shaft.
• Unscrew themounting nut
clock wise.
Ifthemounting nutbecomes slackdue
tofrequent loosening andretightening,
fitanew one.
Fitting nylonline
•Refer toinstruction sheetsupplied
with fixed linehead.
Grass cutting blade230
Brush knife250
Note:
Remove skirtandblade from
deflector beforemounting these
cutting tools.
• Layyour brushcutter onitsback
with thegear head facing up.
• Place cutting tool
(1)onthe thrust
plate (2).
• Cutting edgesofblade 230-8
(3)mustpoint clockwise.
• Cutting blade230-4
(4)andbrush
knife
(5)may befitted either way
round. •
Slipthethrust washer
(6)andrider plate(7)over
the output shaft(8).
• Block theoutput shaft.
• Screw mounting nut
(9)counter­
clockwise ontooutput shaftand
tighten downsecurely.
Important!
Removethestop pin.
Releasing mountingnut
•Block theoutput shaft.
• Unscrew themounting nut
clockwise.
Ifthe mounting nutbecomes slackdue
tofrequent loosening andretightening,
fit anew one.
29