MS 661 C-M Petrol Chainsaw: Extremely powerful 5.4kW professional saw
Very powerful high-performance saw with advanced 2-MIX technology and STIHL M-Tronic (M). This electronic engine management system regulates the ignition timing and the fuel supply and automatically registers the external temperature for optimal engine performance, great acceleration and sustained maximum torque. Extremely robust and durable with low vibration levels. Designed for professional use within forestry and big timber harvesting.

Find the correct replacement guide bar and saw chain for your tool with the STIHL bar & chain advisor.

Exterior design of STIHL guide bars are subject to change. Technical specifications remain the same.

Displacement 91.1 cm³
Power 5.40 kW
Engine power 7.30 HP
CO2 679 g/kWh
Device weight without refuelling 7.5 kg 1)
System weight without refuelling 9.22 / 10.38 kg 2)
Power-to-weight ratio 1.40 kg/kW
Bar length 71 / 90 cm 3)
Bar length 28 / 36 in 3)
Groove width 1.60 mm
Groove width 63 in
Saw chain pitch 3/8″
Device length with bumper spike 467 mm 1)
Sound pressure level 105 dB(A) 4)
Sound power level 115 dB(A) 4)
Vibration level left 6.9 m/s² 5)
Vibration level right 5.6 m/s² 5)