Stihl FS 80 User Manual

•
Fitpistonpin(1)onstubofas-
sembly drift (2) and slide it into
the piston (the pin slides home
easily if the piston is hot).
•
Modify sleeve of assembly tool
5910 890 2208 as shown above.
a=35.5mm
b=17.3mm
c = 21.0 mm
•
Insert hookless snap rings with
assembly tool (1) 5910 890 2208.
Note: Refer to manual "Trouble-
shooting, standard repairs" for in-
formation on using the assembly
tool.
•
Fit new cylinder gasket.
•
Lightly oil the piston and piston
rings and rest the piston (1) on
the wooden assembly block (2)
1108 893 4800.
•
Line up the piston rings so that
the radii at the ring gap meet at
thefixingpininthepistongroove.
•
Use clamping strap (1)
0000 893 2600 to enclose piston
and piston rings.
- Ensure that piston rings are
positioned correctly.
- Coat inside of cylinder with oil
and line it up in accordance with
its subsequent installed position.
The piston rings may break if this
is not done.
366RA071 VA
2
1
366RA075
1
VA
366RA073 VA
392RA205
a
c
b
VA
145RA090 VA
366RA072
1
VA
366RA074
1
2
VA
17

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