MS 311, MS 391
English
39
Cooling inlets
Clean
X
Air inlet on fan housing
Clean
X
X
X
Cylinder fins
Clean
X
X
X
Preseparator port and carburetor body
Clean
X
"Carb preheat" shutter and preheating port Clean (winter operation only)
X
Carburetor
Check idle adjustment – chain must not
rotate
X
X
Readjust idle
X
Spark plug
Readjust electrode gap
X
Replace after every 100 operating hours
All accessible screws and nuts (not adjust-
ing screws)
3)
Retighten
X
Spark arresting screen
4)
in muffler
Check
X
Clean or replace
X
Chain catcher
Check
X
Replace
X
Safety labels
Replace
X
1)
STIHL recommends a STIHL servicing dealer.
2)
see chapter on "Chain Brake"
3)
Firmly tighten down the cylinder base screws of chain saws (3.4 kW or more) after 10 to 20 hours of operation.
4)
not in all versions, market-specific
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, resin-
rich wood, tropical wood, etc.), shorten the specified intervals accordingly. If you only
use the saw occasionally, extend the intervals accordingly.
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Summary of Contents for MS 391
Page 1: ...Chain Saw Safety Manual...
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Page 21: ...STIHL MS 311 391 Instruction Manual...
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