Stihl MS 661 C-M User Manual

91MS 661, MS 661 C-M
: Place the throttle trigger (1) in the
rear handle so that the
tongue (arrow) is within the
handle and the holes in the
throttle trigger and handle are in
alignment.
: Use a punch (2) to center the
throttle trigger (1).
: Drive home the pin (3) until it is
recessed by the same amount at
both sides.
All models
: Attach the throttle rod (1) to the
throttle trigger (2).
1166RA326 TG
3
2
1
1166RA328 TG
1
2
: Fit the leg (1) of torsion spring
under the lockout lever (2) and
engage lockout lever (2) in the
pivot mounts (arrows).
Note flat on lockout lever's shaft.
: Turn the lockout lever (2)
downwards and attach leg (1) of
torsion spring.
– Fit the handle molding and push it
down until it snaps into position
– lockout lever (2) may pop out.
Check operation
– Squeeze trigger all the way, the
throttle lever on the carburetor
must then be in the full throttle
position. It should not be possible
to move it any further in the open
direction.
– Reassemble all other parts in the
reverse sequence.
11.3 Throttle Rod
– Remove the handle molding and
lockout lever, b 11.2
– Remove the filter base, b 13.3
– On versions without M-Tronic,
remove the choke rod, b 11.3.1
1166RA329 TG
2
1
1
: Disconnect the throttle rod (1)
from the throttle trigger (2).
: Lift locking tabs (arrows) and pull
the retainer (1) out part way.
: Disconnect the throttle rod (2)
from the lever (3).
1166RA322 TG
1
2
1166RA332 TG
1
2
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