Stihl FS 80 Service Manual

15FC 75, FC 85, FH 75, FS 75, FS 80, FS 85, HL 75, KM 85, KW 85
: Attach one end of each spring (1)
to the clutch shoes.
: Use the hook (2) 5910 890 2800
to attach other ends of springs
and press them firmly into the
clutch shoes.
VA
936RA291
1
2
: Screw the clutch into position
(lower hexagon facing outwards)
and tighten it down firmly, b 3.2
VA
936RA006
: Check that the plugs are in
position in the fan housing, fit
them if necessary.
VA
936RA007
: Position the engine against the
fan housing, making sure the
lugs (1) engage the plugs (2).
– Fit fan housing mounting screws
and tighten them down firmly,
b 3.2
VA
936RA008
1
2
– Remove the locking strip from the
cylinder.
– Install the spark plug and tighten
it down firmly, b 3.2
– Check if spark plug has a
detachable adapter nut. If so,
make sure it is properly fitted and
firmly tightened.
– Fit boot on the spark plug.
– Fit the shroud, b 5.1
– Remove the engine, b 5.2.1
– Remove the rubber element (AV
system) from the fan housing,
b 7.1
: Use pliers (1) 0816 610 1495 to
remove the circlip from the clutch
drum’s output stub.
VA
936RA111
1
: Use drift (1) 4180 893 4400 to
press the clutch drum out of the
ball bearing.
VA
936RA112
1
5.2.2 Clutch Drum

Stihl FS 80 Specifications

General

Engine Type	2-stroke
Displacement	25.4 cc
Cutting Diameter	420 mm
Shaft Type	Straight
Starter	Recoil
Sound Power Level	106 dB(A)
Fuel Capacity	0.44 liters
Vibration Level	4.5 m/s²