Stihl MS 661 C-M User Manual

103MS 661, MS 661 C-M
: Fit the screws (1).
– Check position of metering
diaphragm and gasket, then
tighten down the screws firmly in
a crosswise pattern.
– Push the sleeve onto the stub.
– Reassemble all other parts in the
reverse sequence.
13.5.4 Inlet Needle
– Remove the metering
diaphragm, b 13.5.3
All models
: Take out the screw (1).
: Take the inlet control lever (2)
with spindle out of the inlet
needle’s groove.
The small spring under the inlet
control lever may pop out.
1166RA246 TG
1
1
1
1
1166RA247 TG
1
2
: Pull out the inlet needle (1) and
spring (2), check and replace if
necessary.
If there is an annular
indentation (arrow) on the sealing
cone of the inlet needle, fit a new
inlet needle.
Installing
: Fit the inlet needle (1).
: Fit the spring (2) in the bore.
1166RA248 TG
1
2
165RA348 TG
1166RA249 TG
1
2
: Position the inlet control lever (1)
with spindle (2) on the spring
(arrow) first, then slide the inlet
control lever’s clevis into the
groove in the inlet needle (3).
Make sure the spring locates on the
control lever’s nipple.
– Press the inlet control lever down
and secure it with the screw.
– Check that the inlet control lever
moves freely.
– Install the metering diaphragm,
b 13.5.3
1166RA250 TG
2
13

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