Stihl MS 261 C-MQ Instruction Manual page 53

The following information applies in normal operating conditions. The specified inter-
vals must be shortened accordingly when working for longer than normal or under
difficult cutting conditions (extensive dust, highly resinous lumber, lumber from trop-
ical trees, etc.). If the machine is only used occasionally, the intervals can be
extended accordingly.
Air filter
Anti-vibration elements
Air intake on fan housing
Cylinder fins
Carburetor
Spark plug
Accessible screws, nuts and bolts
Spark arresting screen in muffler
Chain catcher
Exhaust bore
Safety information label
1)
STIHL recommends STIHL servicing dealers
2)
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
MS 261 C-MQ
Clean
Replace
Check
Have them replaced by a servicing
1)
dealer
Clean
Clean
Check idle adjustment – saw chain must
not rotate
If the saw chain rotates in idle, have the
chain saw serviced by a servicing
1)
dealer
Adjust electrode gap
Replace after 100 hours of operation
2)
Tighten
Have checked by a specialist dealer
Have cleaned by a specialist dealer, or
1)
replaced if necessary
Check
Replace
Decarbonise after 139 hours of opera-
tion, subsequently after every 150 hours
of operation
Replace
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1)
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English
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