Stihl MS 661 C-M User Manual

99MS 661, MS 661 C-M
: Remove the carburetor (1).
– Check the carburetor and service
or replace it if necessary.
: Check the sleeve (2), remove
and replace it if necessary.
Installing
Check that the washer (1) and
sleeve (2) are in place.
1
1166RA313 TG
2
1166RA041 TG
2
1
Models with M-Tronic
: Fit the carburetor (1) over the
studs (arrows) so that the
lever (2) on the switch shaft is
behind the lever (3) on the choke
shaft.
All models
– Use STIHL press fluid to make
installation easier, b 16
: Fit the carburetor (1) over the
studs (arrows), and push the
stub (2) into the impulse hose (3)
at the same time.
– Make sure the sleeve (4) is in
place.
1
1166RA314 TG
2
3
1
1166RA315 TG
4
2
3
– Use STIHL press fluid to make
installation easier, b 16
: Grip tab (2) on elbow connector
with fuel suction hose (1) to push
it into fuel suction hose (3) so that
the guide lug engages between
the ribs (arrow)
– the fuel suction hose is fixed in
position.
Models with M-Tronic
: Push spade terminal of black M-
Tronic wire (1) onto contact
spring's tag (2) so that its crimped
side faces up, then push black M-
Tronic wire (1) into the guides
(arrows) – loop (3) allows for
movement.
1166RA316 TG
1
3
2
2
1166RA317 TG
3
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