Stihl MS 261 C-M Instruction Manual page 40

English
The following maintenance intervals apply in normal operating conditions. The spec-
ified intervals must be shortened accordingly when working for longer than normal
or under difficult cutting conditions (extensive dust, highly resinous lumber, lumber
from tropical trees, etc.). If the machine is only used occasionally, the intervals can
be extended accordingly.
Antivibration elements
Cooling air intake slits
Air intake on fan housing
Cylinder fins
Pre-separator duct and carburetor
housing
Shutter "pre-heat carburetor" and pre-
heating duct
Carburetor
Spark plug
All accessible screws, nuts and bolts (not
3)
adjusting screws)
4)
Spark arresting screen in muffler
Chain catcher
Exhaust bore
Safety information labels
1)
STIHL recommends STIHL servicing dealers
2)
see "chain brake"
3)
During initial use of chain saws (with a power output of 3.4 kW or more), tighten the cylinder block screws after 10 to 20 hours of operation
4)
present only in some countries
38
check
have them replaced by a specialist
1)
dealer
clean
clean
clean
clean
clean (only in winter operation)
Check idle adjustment – saw chain must
not rotate
adjust electrode gap
replace after every 100 hours of
operation
retighten
check
clean or replace
check
replace
decarbonise after 139 hours of opera-
tion, subsequently after every 150 hours
of operation
replace
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MS 261 C-M