Stihl MS 661 C-M User Manual

105MS 661, MS 661 C-M
: Fit the pump diaphragm (1) on
the gasket so that their tabs
(arrow) are in alignment and its
holes engage the pegs (2).
Gasket and pump diaphragm are
now held in position.
: Fit the end cover (1) from below
so that the pump diaphragm and
gasket remain in position.
: Align the end cover (1) so that the
stub (2) faces the throttle shutter.
1166RA256 TG
1
2
2
1166RA257 TG
1
2
: Move the end cover (1) back and
forth until its pegs engage the
holes in the carburetor body.
– Check that the pump diaphragm
and gasket are properly seated.
: Insert and tighten down the
screws (2) firmly.
Versions with carburetor heating
: Push the wire (1) into the guides
(arrows).
1166RA258 TG
2
1 2
2
2
1166RA260 TG
1
: Move the end cover (1) back and
forth until its pegs engage the
holes in the carburetor body.
: Fit the thermostatic switch (2) so
that it engages the recesses
(arrows).
– Check that the pump diaphragm
and gasket are properly seated.
: Insert and tighten down the
screws (3) firmly.
All models
– Reassemble all other parts in the
reverse sequence.
13.5.6 Lever on Throttle Shaft
– Remove the carburetor, b 13.4
– Carburetor troubleshooting,
b 3.6
1166RA259 TG
3
2 3
3
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