The STIHL MS 661 is a top-tier chainsaw built for the most demanding professional applications, such as large-scale forestry and timber harvesting. Combining immense power with advanced technology, it is designed to deliver exceptional performance and reliability. Whether you’re felling giant trees or tackling tough cuts, the MS 661 offers a range of features to ensure efficiency, ease of use, and long-lasting durability. Key Features: Bar & Chain Options: Available with a 28″ or 36″ bar and chain, suitable for heavy-duty tasks. STIHL 2-MIX Technology: Enhances fuel efficiency and reduces emissions, ensuring a cleaner and more economical operation. STIHL M-Tronic (M) System: Provides fully electronic engine management, automatically adjusting ignition timing and fuel metering for optimal performance in varying conditions. Effortless Start-Up: Decompression Valve: Facilitates easier starting by reducing the force needed on the starter cord. Simplified Operation: Combi Lever with Stop Function: Enables quick restarts by returning the control lever to the operating position after shutdown. Anti-Vibration System: Minimizes vibrations to reduce operator fatigue and enhance comfort during extended use. HD2 Filter: Features fine-pored material for superior dust filtration and is easy to clean for extended engine life. Controlled-Delivery Oil Pump: Allows for precise oiling and reduces oil consumption by up to 50%, particularly useful in dry conditions or with longer bars. Side-Mounted Chain Tensioning: Provides easy access for quick and secure chain adjustments. Captive Nuts on Sprocket Cover: Ensures nuts are not lost during maintenance or bar changes. Ematic Chain Lubrication System: Efficiently distributes oil where needed, further minimizing oil consumption. Tool-Free Fuel Cap: Offers fast and convenient refueling with a bayonet closure for easy access. With its robust build and advanced features, the STIHL MS 661 stands out as a powerful and reliable tool for professional users demanding the highest performance in their work. SPECIFICATIONS Bar length 71-90 cm Bar length 28-36 ” Displacement 91 cm³ Power output 5.4/7.3 kW/HP Weight 7.5 kg 1) Power-to-weight ratio 1.4 kg/kW Weight 9.22 / 10.38 kg 2) Sound pressure level 105 dB(A) 3) Sound power level 118 dB(A) 3) Vibration values left/right 6.9/5.6 m/s² 4) Saw chain pitch 3/8 ” CO2 679 g/kWh
