Stihl MS 661 C-M User Manual

56 MS 661, MS 661 C-M
– Install the switch lever, b 11.1.1
Models without M-Tronic
: Push the retainer (1) into the tank
housing (2) until the locking tabs
(arrows) engage.
Models with M-Tronic
: Move the switch shaft (1) in
direction of "STOP" and hold it
there. Push the retainer (2) into
the guides in the tank housing (3)
until the locking tabs (arrows)
engage, position lever (4) behind
lever (5) on choke shaft at the
same time.
2
1
1166RA442 TG1166RA170 TG
1
2
3
4
5
Models without M-Tronic
Short circuit wire (1) and ground
wire (2) must be properly located in
the guides (3, 4). If necessary, push
the wires fully home – the loops
(arrows) allow for movement.
Models with M-Tronic
Short circuit wire (1) and ground
wire (2) must be properly located in
the guides (3, 4) – the loops
(arrows) allow for movement.
1166RA221 TG
2
3
4
1
4
6
1166RA441 TG
1
2
3
5
7
The M-Tronic's black wire (5) must
locate properly in the guides (6, 7) –
loop (arrow) allows for movement.
Checking operation of all models
: The short circuit wire's ring
terminal (1) must touch the
contact spring (arrow) in position
"0" – on M-Tronic models the
switch shaft must be held in
position "0".
Also perform contact and continuity
check on ground wire between ring
terminal and contact spring and
replace the wiring harness if
necessary.
– If no fault can be found, check the
ignition system with the aid of the
troubleshooting chart, b 7.13
– Reassemble all other parts in the
reverse sequence.
1166RA223 TG
1

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