Stihl MS 661 C-M User Manual

88 MS 661, MS 661 C-M
11. Control Levers
11.1 Switch Shaft
The positions of the switch shaft are
described in the instruction manual.
11.1.1 Removing and Installing
– Remove the air filter, b 13.1
– Remove the filter base, b 13.3
– Remove the handle molding and
disconnect throttle rod from
throttle trigger, b 11.3
Models without M-Tronic
– Remove the choke rod, b 11.3.1
: Pry switch shaft (1) out of pivot
mount (arrow) and pull it out of
the lateral pivot mount
– take care not to damage the
short circuit wire.
Models with M-Tronic
– Remove the throttle trigger,
b 11.2
1166RA291 TG
1
: Lift locking tabs (arrows) and pull
out the retainer (1) part way, slip
lever (2) below the choke shaft's
lever at the same time.
: Pry switch shaft (1) out of pivot
mount (arrow) and pull it out of
the lateral pivot mount
– take care not to damage the
short circuit wire.
All models
: Pull the short circuit wire (1) out
of the guides (arrows) and push
the ring terminal (2) out
sideways.
1166RA292 TG
1
2
1166RA293 TG
1
1166RA294 TG
1
2
– Inspect the switch shaft and
replace if necessary.
– Inspect the contact spring and
retainer, replace if necessary,
b 7.12
– Check the short circuit wire and
replace if necessary, b 7.9,
b 7.10
Installing
All models
Thread the short circuit wire (1)
through the opening (arrow).
: Push the ring terminal (1) onto
the pivot pin (2) so that its
crimped side is visible.
: Fit the short circuit wire (3) tightly
around the switch shaft (4) and
push it into or hook it onto the
guides (arrows) – the short circuit
wire (3) must be a snug fit on the
switch shaft (4).
1166RA295 TG
1
1166RA296 TG
3
1
2 4

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