Stihl MS 661 C-M User Manual

51MS 661, MS 661 C-M
: Push grommet (1) out in direction
of cylinder and pull wiring
harnesses (2, 3) out in direction
of cylinder.
– Remove the switch shaft,
b 11.1.1
– Remove the contact spring and
retainer, b 7.12
– Remove the carburetor, b 13.4
– Remove the tank housing,
b 13.11.4
: Disconnect the ground wire (1)
from the heater switch (2) and
pull it out of the guides (arrows).
1166RA134 TG
2
1
3
1166RA136 TG
1
2
: Take out the screw (1), pull the
black wire (2) and red wire (3) out
of the guides (arrows) – screw (1)
has already been removed on
machines with carburetor
heating.
: Pull the ground wire (1) and short
circuit wire (2) out of the guides
(arrows).
: Press lug (arrow) on grommet (1)
in direction of cylinder and push it
out sideways.
1166RA137 TG
1
2
3
1166RA138 TG
2
1
1166RA139 TG
1
– Remove the wiring harnesses
with grommets.
: Remove grommet (1) from the
wiring harness via lateral opening
(arrow) and pull off grommet (2)
in direction of ring terminals.
– Check the wiring harnesses and
replace if necessary.
: If necessary, pull locking tab (1)
towards wires, open the cover (2)
and take out the wires.
A new wiring harness comes with
the plug and insulated housing
already fitted.
1166RA140 TG
2 1
1166RA141 TG
1
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