Stihl MS 661 C-M User Manual

72 MS 661, MS 661 C-M
8.7.3 Engine speed drops under load
– engine down on power
– Look for fault in fuel
system, check engine for
leaks,
b 13.5, b 6.2
– Check the air filter and clean or
replace if necessary, b 13.1
Troubleshooting completed
Power tool in order?
yes
no
Engine speed drops under load –
low power
– Calibrate the control unit,
b

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