Stihl FS 80 User Manual

•
Slidecylinderoverpiston;the
clampingstrapslipsdownward
andthepistonringsslipintothe
cylinder.
-Removeclampingstrapand
assemblyblock.
-Lineupcylinderandcylinder
gasket.
•
Tightencylinderbasescrewsto
atorqueof9.5Nmwithsocket
(1)08125422104.
See4.4forfurtherassemblysteps.
-Removepiston,see4.5.1.
Note:Cokingresiduesmustnot
beallowedtoenterthecrankcase
whenfittingthepistonringsand/or
cleaningthegrooves.
-Removepistonringsfrompiston.
•
Scrapethegroovescleanwitha
pieceofoldpistonring.
•
Fitthenewpistonringsinthe
groovessothattheradiiface
upwards.
-Installpiston,see4.5.2.
-Removecylinder,see4.5.1
•
Unscrewstartercarrierfrom
crankshaftstub.
•
Unscrewclutchfromcrankshaft
stub.
•
Pullflywheeloffcrankshaftstub,
see5.3.
392RA037 VA
145RA098 VA
392RA036 VA
366RA065 VA
145RA099 VA
366RA078 VA
4.6 Pistonrings4.7Crankcase
4.7.1 Removingthecrankshaft
392RA035
1
VA
18

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