Stihl MS 661 C-M User Manual

68 MS 661, MS 661 C-M
8.6 Solenoid Valve
– Remove the carburetor, b 13.4
– Remove the switch unit, b 8.5
– Clean the carburetor, b 13.5.1
Removing
: Use screwdriver 5910 890 2313
to take out screw (1) and remove
the retainer (2).
: Pull out the solenoid valve (3)
– do not re-use the solenoid
valve, always install a new one.
Make sure no dust or dirt gets into
the solenoid valve's mounting bore.
1166RA453 TG
1
2
3
Installing
The area around the mounting bore
must be completely free from dust
and dirt.
Only hold the solenoid valve above
the collar
– sealing faces might otherwise be
damaged.
: Position the solenoid valve (1) so
that it rests against the
carburetor's stop (2), then push it
carefully into the mounting bore.
Do not rotate the solenoid valve
during this process – its sealing
face must not be damaged.
The solenoid valve (1) must be
pushed squarely into the mounting
bore.
1166RA454 TG
2
1166RA455 TG
1
2
: Position the retainer (1) so that
the lug engages the hole (arrow)
– the retainer is held in place.
: Insert and tighten down the
screw (2) firmly.
– Install the switch unit, b 8.5
– Install the carburetor, b 13.4
– Calibrate the control unit, b 8.1
– Reassemble all other parts in the
reverse sequence.
1166RA456 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