Stihl FS 80 User Manual

•
Connectfuellinewithsocketto
elbowconnectorofcarburetor.
•
Connectpressurehosefrom
testertosocket.
•
Closeventingscrew(1)onpump
ball(2)andpumpairintothecar-
buretoruntilpressuregauge(3)
showsapressureofapprox.
0.8bar.
Thecarburetorisairtightifthis
valueremainsconstant.Ifit
drops,however,thismaybedue
totwomainreasons:
1.Inletneedledoesnotsealpro-
perly(impuritiesinvalveseat
orsealingconeofinletneedle
damagedorinletcontrollever
jammed).
2.Meteringdiaphragmdamaged.
Thecarburetormustberepairedin
bothcases;refertothe"Carbure-
tor"manual.
-Afterthetest,openventing
screwanddisconnectfuelline
fromelbowconnector.
-Connectfuelhosetoelbow
connector.
-Refitshroud.
-Removeshroud,see3.1.
•
Disconnectthrottlecablenipple
(1)fromslottedpin(2)onthrottle
lever.
•
Pullfuelhose(1)offconnecting
socketonfuelpumpflange.
-Disconnectfuelhose(2)from
elbowconnectoroncarburetor.
-Removeairfilter,see8.1.
•
Unscrewnuts.
-Removefilterhousing.
8.2.2 Removalandinstallation
392RA109
VA
392RA092
2
VA
1
1
392RA112
2
VA
392RA110
VA
392RA113
VA
392RA111
3
2
1
VA
36

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