Maintenance And Care - Stihl FC 91 Instruction Manual

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
All accessible screws and nuts (not adjust-
ing screws)
FC 91
Visual inspection (condition, leaks)
Clean
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 blade must
not rotate
Adjust idle speed
Readjust 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
Retighten
X X
X
X X
X
X X
X
X
English
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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