Maintenance And Care - Stihl FS 91 Manual De Instrucciones

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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.
Complete machine
Control handle
Air filter
Manual fuel pump (if fitted)
Pickup body in fuel tank
Fuel tank
Carburetor
Spark plug
Cooling inlets
Cylinder fins
Valve clearance
Spark arresting screen in muffler
42
Visual inspection (condition, leaks)
Clean
Replace any damaged parts
Check operation
Visual inspection
2)
Replace
Check
1)
Have repaired by servicing dealer
1)
Have checked by servicing dealer
1)
Have replaced by servicing dealer
Clean
Check idle adjustment – the cutting
attachment must not rotate
Adjust idle speed
Adjust electrode gap
Replace after every 100 operating hours
Visual inspection
Clean
1)
Have cleaned by servicing dealer
If power is low or cranking effort very
high, have valve clearance checked
and, if necessary, adjusted by servicing
1)
dealer
Check
Clean or replace
X X
X
X
X X
X
X X
X
X
X
X X
X
X
X
X X
X
X
X
X
X
FS 91, FS 91 R
X
X
X
X
X
X