Stihl MS 661 C-M User Manual

100 MS 661, MS 661 C-M
Position red M-Tronic wire (1) on
switch unit below the black M-Tronic
wire.
: Place the cable lug of the red
M-Tronic wire (1) in its seat so
that the crimped side faces up,
then push the red M-Tronic
wire (1) into the guides (arrows) –
loop (2) allows for movement.
: Insert and tighten down the
screw (3) firmly.
Versions with carburetor heating
The flag terminal of the heating
element (1) is connected to the
heater switch.
: Fit the heating element (1) over
the studs so that the wire (2) is at
the top right.
21
1166RA3018 TG
3
1166RA319 TG
1
2
3
4
The black M-Tronic wire must be
underneath the heating element's
black wire (3) in the guides.
: Push black wire (3) of heating
element (1) into the guides
(arrows)
– loop (4) allows for movement.
: Push the cable lug of the black
wire (1) to the thermocouple into
its seat so that the crimped side
faces up and the wire locates in
the guide (arrow).
: Insert and tighten down the
screw (2) firmly.
Models without M-Tronic:
– Use STIHL press fluid to make
installation easier, b 16
1166RA320 TG
1
2
2
1166RA366 TG
1
4
3
: Hold the grommet (1) so that the
extensions (2, 3) and the peg (4)
match the openings (arrows) in
the tank housing.
: Slide the grommet (1) between
the handlebar cover and tank
housing, then push it into the
openings (arrows) as far as stop.
– Attach the throttle rod to the
carburetor and throttle trigger,
b 11.3
– Install the choke rod, b 11.3.1
Models with M-Tronic
– Use STIHL press fluid to make
installation easier, b 16
: Hold the grommet (1) so that the
frame (2) and the peg (4) match
the openings (arrows) in the tank
housing.
: Slide the grommet (1) between
the handlebar cover and tank
housing, then push it over the
heater switch and into the
openings (arrows) as far as stop.
– Attach the throttle rod to the
carburetor and throttle trigger,
b 11.3
All models
– Check operation
– Reassemble all other parts in the
reverse sequence.
2
1
1166RA367 TG
3

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