Stihl MS 661

106 MS 661, MS 661 C-M
: Remove the E-clip (1) and pull off
the lever (2).
Installing
: Position the lever (1) so that its
hook engages the lever on the
choke shaft (arrow).
: Push the lever (1) onto the
throttle shaft (2) so that it
engages the flats on the end of
the shaft.
: Fit the E-clip (3).
– lever (1) must engage
lever (4) (arrow).
– Reassemble all other parts in the
reverse sequence.
13.5.7 Lever on Choke Shaft
– Remove the carburetor, b 13.4
– Carburetor troubleshooting,
b 3.6
1166RA261 TG
2
1
1166RA262 TG
1
3
2
4
: Take out the screw (1) and pull
off the lever (2).
Installing
: Position the lever (1) so that it
points in the direction of the
throttle shaft – on models without
M-Tronic, fit lever with lobe on its
tip (arrow).
: Push the lever (1) onto the choke
shaft so that it engages the flats
on the end of the shaft.
: Insert and tighten down the
screw (2) firmly.
– Reassemble all other parts in the
reverse sequence.
1166RA263 TG
2
1
1166RA264 TG
1
2
13.5.8 Lever on Choke Shaft /
Switch Unit,
Models with M-Tronic
– Remove the carburetor, b 13.4
– Troubleshooting, b 8.3
Carburetor is shown from below for
greater clarity.
: Remove the E-clip (1) and pull off
the lever (2) with torsion
spring (3).
– Inspect lever and torsion spring,
replace if necessary.
– Inspect the switch unit, replace if
necessary, b 8.3.3, b 8.5
– Check the solenoid valve,
replace if necessary, b 8.3.4,
b 8.6
Installing
: Fit the torsion spring (1) so that
its leg (arrow) rests against the
rib on the carburetor.
1166RA266 TG
2
13
1166RA267 TG
1