Stihl MS 661 C-M User Manual

54 MS 661, MS 661 C-M
The generator wire (1) must locate
fully in the recess in the area of the
expansion loop (arrow).
The flywheel must not touch the
generator wire
– this could cause a break in power
supply.
– Install the flywheel, b 7.7
– Install the control unit, b 7.2
– Reassemble all other parts in the
reverse sequence.
1166RA157 TG
1
7.12 Contact Spring
– Remove the filter base, b 13.3
– Remove the switch shaft,
b 11.1.1
All models
: Lift locking tabs (arrows) and pull
out the retainer (1) part way,
disconnect the throttle rod (2)
from the carburetor (1) at the
same time.
1166RA158 TG
1
2
3
Models with M-Tronic
: Pull out retainer (1) part way and
disconnect terminal (2).
All models
: Lift the contact spring (1) a little
and ease it over the tab (arrow).
: Ease the contact spring (1) out of
the guides in the retainer (2).
: Turn the ring terminal (1) up and
pull it off the pivot pin on the
retainer (2).
1166RA159 TG
2
1
1166RA160 TG
1
2
1166RA161 TG
1
2 4
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