Stihl MS 661 C-M User Manual

119MS 661, MS 661 C-M
The black M-Tronic wire (1)
must be underneath the heating
element's black wire (2) in the
guides.
: Push the heating element's black
wire (2) into the guides (arrows) –
loop (3) allows for movement.
– Reassemble all other parts in the
reverse sequence.
14.1.3 Thermostatic Switch
The thermostatic switch is an
electronic component that cannot
be tested directly. Check operation
of thermostatic switch with the aid of
the "Troubleshooting Chart",
b 14.2.
– Remove the carburetor, b 13.4
1166RA423 TG
2
13
: Take out the screws (1) and
remove the thermostatic
switch (2).
Do not loosen the fourth screw (3)
– end cover (4), pump diaphragm
and gasket remain fixed in position.
Installing
: Push the wire (1) into the guides
(arrows).
1166RA424 TG
1
2 1
1
3
4
1166RA260 TG
1
: Fit the thermostatic switch (1) so
that it engages the recesses
(arrows).
: Insert and tighten down the
screws (2) firmly.
– Install the carburetor, b 13.4
– Check operation with
"Troubleshooting Chart", b 14.2
– Reassemble all other parts in the
reverse sequence.
1166RA425 TG
2
1 2
2

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