Stihl MS 661 C-M User Manual

16 MS 661, MS 661 C-M
Condition Cause Remedy
Engine running extremely rich, has
no power and a very low maximum
speed
Choke shutter does not open fully Check carburetor and choke shaft,
service or replace if necessary
Models with M-Tronic, carburetor
setting too rich
Check M-Tronic with STIHL MDG 1
and troubleshooting chart, b 8.7,
adjust or calibrate control unit,
b 8.1

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