Stihl MS 661 C-M User Manual

90 MS 661, MS 661 C-M
11.2 Throttle Trigger / Lockout
Lever
All models
: Use STIHL combination wrench
to ease the lugs (1) on the
underside apart and push them
through the rear hand guard.
– Remove the handle molding and
pull the lockout lever out of the
pivot mounts – the lockout lever
may pop out.
: Disconnect the throttle rod (1)
from the throttle trigger (2).
1
1
1166RA321 TG
1166RA322 TG
1
2
: Use a punch (2) to drive out the
pin (1) and remove the throttle
trigger (3) with torsion spring (4).
– Inspect the lockout lever, throttle
trigger and torsion spring,
replace as necessary.
Installing
Models with M-Tronic
: Attach the torsion spring (1)
between lever (2) and throttle
trigger (3) – note installed
position (arrow).
1166RA323 TG
1
2
4
3
1166RA325 TG
1
2
3
: Fit the throttle trigger (1) in the
rear handle so that lever (2)
engages over the switch lever's
cam and the tongue (arrow) is
within the rear handle – the holes
must be in alignment.
: Use a punch (3) to center the
throttle trigger (1).
On versions with heating, make
sure the connecting wires are
properly seated in the guide and do
not protrude
– risk of pinching the wires, b 14.8.
: Drive home the pin (4) until it is
recessed by the same amount at
both sides.
Models without M-Tronic
: Attach the torsion spring (1) to
the trigger (2)
– note the installed position
(arrow).
1166RA327 TG
4
3
1
2
1166RA324 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