![background image](http://html.mh-extra.com/html/stihl/fs-91-r/fs-91-r_instruction-manual_1379260046.webp)
FS 91, FS 91 R
English
44
Maintenance and Care
The following intervals apply to normal operating conditions only. If your daily work
-
ing time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
be
for
e s
ta
rting
work
af
te
r fin
ish
ing
work
or
dail
y
af
te
r each
ref
ueli
ng
st
op
weekly
mont
hly
every
12
mont
hs
if p
roble
m
if d
amage
d
as
requ
ired
Complete machine
Visual inspection (condition, leaks)
X
X
Clean
X
Replace any damaged parts
X
X
Control handle
Check operation
X
X
Air filter
Visual inspection
X
X
Replace
2)
X
Manual fuel pump (if fitted)
Check
X
Have repaired by servicing dealer
1)
X
Pickup body in fuel tank
Have checked by servicing dealer
1)
X
Have replaced by servicing dealer
1)
X
X
X
Fuel tank
Clean
X
X
Carburetor
Check idle adjustment – the cutting
attachment must not rotate
X
X
Adjust idle speed
X
Spark plug
Adjust electrode gap
X
Replace after every 100 operating hours
Cooling inlets
Visual inspection
X
Clean
X
Cylinder fins
Have cleaned by servicing dealer
1)
X
Valve clearance
If power is low or cranking effort very
high, have valve clearance checked
and, if necessary, adjusted by servicing
dealer
1)
X
Spark arresting screen in muffler
Check
X
X
Clean or replace
X
X
Summary of Contents for FS 91 R
Page 2: ...Instruction Manual 1 56 Manual de instrucciones 57 118 ...
Page 121: ...FS 91 FS 91 R español EE UU 119 ...
Page 122: ...FS 91 FS 91 R español EE UU 120 ...
Page 123: ......