The STIHL MS661 stands as a formidable Professional Chainsaw, boasting an impressive 5.4kW power output. This high-performance saw integrates advanced 2-MIX technology along with STIHL M-Tronic (M). It is available with a choice of a 30″ or 36″ bar and chain. The M-Tronic system, an electronic engine management marvel, precisely regulates ignition timing and fuel supply. Additionally, it automatically adjusts for external temperature variations, ensuring optimal engine performance, exceptional acceleration, and sustained maximum torque.
Built for the rigors of professional use in forestry and large timber harvesting, the MS 661 combines extreme power with durability. Its robust design minimizes vibration levels, contributing to a more comfortable and efficient operation. With a focus on reliability and performance, the STIHL MS 661 is a go-to choice for professionals tackling challenging cutting tasks.
The chainsaw comes equipped with a rollomatic E guide bar, contrary to the rollomatic ES light shown in the illustration.
Technical data
Displacement cm 91.1
Power output kW/bhp 5.4/7.3
Weight kg 1) 7.4-7.5
Power-to-weight ratio kg/kW 1.4
System weight kg 2) 9.22 / 10.28 / 10.38
CO2 g/kWh 711
STIHL Oilomatic saw chain pitch/type 3/8″ RS
Sound pressure level dB(A) 3) 105
Sound power level dB(A) 3) 118
Vibration values left/right m/s 4) 6.9/5.6
Tank volume l 0.85
Speed at maximum power Um 9.500
Bumper spike Stahlkralle,Steel claw
Sprocket – number of teeth 7.7 Z
Cylinder Chrome
Oil pump Adjustable,
Filter HD2 filter,Patronenfilter HD2
Sprocket Chain sprocket,Ring sprocket,
Chain tensioning Lateral chain tensioning,
Anti vibration system Standard AV-System
Handle type Standard grip,
Filler cap Tool free filler cap,
Chain pitch 3/8″
EPA Certified fuel consumption glh 0.751
EPA Certified fuel consumption l/h 2.841
Oil tank volume cm3 400