Stihl MS 661 C-M User Manual

116 MS 661, MS 661 C-M
: Push the manifold flange (1) out
of the tank housing in the
direction of the cylinder.
: Pull out tank housing about
30 mm and disconnect impulse
hose (1) from stub (arrow).
: Pull the tank housing (1) out of
the crankcase (2).
– Inspect the tank housing and
replace if necessary.
1166RA348 TG
1
1
1166RA412 TG
1166RA413 TG
1 2
Only transfer those parts from the
old tank housing that are not
damaged or not included with the
replacement – see parts list.
– Transfer the switch shaft, b 11.1
– Transfer the wiring harness,
b 7.9, M-Tronic / heating,
b 7.10
– Transfer the lockout lever and
throttle trigger, b 11.2
– Transfer the handlebar, b 10.5
Models with heating, b 10.5.1
Versions with handle and
carburetor heating
– Transfer heating element in rear
handle, b 14.5
– Transfer the heater switch,
b 14.4
– Transfer heating element wiring,
b 14.8
All models
: Check the stop buffer (1) at the
ignition side and replace if
necessary, b 10.4.1
1166RA414 TG
1
Installing
: Push the tank housing (1) with
handlebar between the two
halves of the crankcase until it
locates against the manifold.
: Push tank housing (1) with
handlebar onto pegs on
handlebar holder (2).
: Insert and tighten down the
screws (3) firmly.
– Hold the tank housing with
handlebar steady and thread the
wiring harness at the ignition side
through the opening in the
crankcase towards ignition
module / control unit and install
the grommet, b 7.9, M-Tronic /
heating, b 7.10
1166RA415 TG
1
3
3
1166RA416 TG
12

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