Stihl MS 661 C-M User Manual

71MS 661, MS 661 C-M
Can the engine be
started?
Troubleshooting completed
– Check start detection
(operation of microswitch)
clean if necessary
– Check swich unit and
clean or replace if
necessary, b 8.3.5, b 8.5
– Check start detection,
wiring harness, plug and
screw connections,
b 8.3.5, b 8.3.6,
b 8.3.3
yes
Mechanically
in order?
Specified values
obtained?, b 8.3.5
– Look for fault in fuel
system (inlet needle, lever,
spring, diaphragm),
Check engine for leaks,
b 13.5, b 6.2
– Check the switch unit and
wiring harness and clean or
replace if necessary,
b 8.3.5, b 8.3.6
yes
no
no
Engine does not start in
position } – engine flooded.
Can flooded engine be started
in position F?
yes
no
8.7.2 Engine does not start in position }

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