Stihl MS 390 Instruction Manual page 54

Please note that the following maintenance intervals apply for normal operating conditions only.
If your daily working time is longer than normal or cutting 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.
Carburetor
Spark plug
All accessible screws and nuts
2)
(not adjusting screws)
3)
Spark arresting screen in muffler
Chain catcher
Safety label
1)
STIHL recommends that this work be done by
a STIHL servicing dealer
2)
Firmly tighten cylinder base screws of
professional saws (3.4 kW or more) after 10 to
20 hours of operation
3)
not in all versions, market-specific
MS 290, MS 310, MS 390
Check idle adjustment – chain must not rotate
Readjust idle
Readjust electrode gap
Replace after about 100 operating hours
Retighten
Inspect
Clean or replace
Check
Replace
Replace
X X
X
English / USA
X
X
X
X
X
X
X
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