Stihl MS 661 C-M Installation, Operation & Maintenance Manual

MS 661 C-M
English
50
Air filter
Clean XX
Replace X
Anti-vibration elements
Check XX
Have them replaced by a servicing
dealer
1)
X
Air intake on fan housing Clean XX X
Cylinder fins Clean XX X
Carburetor
Check idle adjustment – saw chain must
not rotate
XX
If the saw chain rotates in idle, have the
chain saw serviced by a servicing
dealer
1)
X
Spark plug
Adjust electrode gap X
Replace after 100 hours of operation X
Accessible screws, nuts and bolts Tighten
2)
X
Spark arresting screen in muffler
Have checked by a specialist dealer
1)
X
Have cleaned by a specialist dealer, or
replaced if necessary
1)
X
Chain catcher
Check X
Replace X
Exhaust bore
Decarbonise after 139 hours of opera
-
tion, subsequently after every 150 hours
of operation
X
Safety information label Replace X
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
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.
Before starting work At the end of work and/or daily Whenever tank is refilled Weekly Monthly Yearly If faulty If damaged As required

Stihl MS 661 C-M Specifications

General

Idle speed	- RPM
Motor type	2-stroke motor
Chain pitch	3/8 \
Blade length	800 mm
Product color	Black, Grey, Orange
Automatic oiling	Yes
Engine displacement	91.1 cm³
Power source	Gasoline
Sound power level	118 dB
Vibration emission	6.9 m/s²
Sound pressure level	105 dB

Weight and Dimensions

Weight	7400 g