Stihl FS 80 User Manual

Seemanual"Troubleshooting,
standardrepairs"fortrouble-
shootingprocedures.
Sparkarresterscreen
•
Removescrew(1).
•
Pulloutsparkarresterscreen(2).
-Cleansparkarresterscreen,fit
newscreenifnecessary.
Muffler
-Removeshroud,see3.1.
•
Removeouterscrew.
•
Removeinnerscrews.
-Liftoffmuffler.
•
Raisetongue(1)onretainer.
•
Pulloutseal(2).
Thepartsareinstalledinreverse
order.
-Presstonguedownagainafter
insertingseal.
-Tightenmufflerscrewstoa
torqueof9.5Nm.
-Refitshroud.
Defectiveoilsealsandgasketsor
cracksincastingscauseleaks.
Suchfaultsallowsupplementary
airtoentertheengineandthus
impairthefuel-airmixture.
Thismakesadjustmentofthe
specifiedidlespeeddifficult,ifnot
impossible.
Italsopreventsasmoothtransi-
tionfromidlespeedtopartorfull
throttle.
Thecrankcasecanbethoroughly
checkedforleakswiththecarbure-
torandcrankcasetesterandthe
vacuumpump.
11
22
392RA013 VA 392RA015 VA
11
22
392RA016 VA
4. Engine
4.1 Muffler/sparkarresterscreen 4.2 Leakagetesting
392RA014 VA
11

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