Description:

When professionals need to fell large trees, in large quantities, they reach for the saw they know has the power to get the job done—the STIHL® MS 661 C-M. Featuring an impressive power-to-weight ratio and STIHL®M-Tronic™ engine management technology, the MS 661 C-M chainsaw also delivers less vibration and 20% greater fuel efficiency than the previous model. Other features include a long-life filter system using HD-2 filter elements to provide longer run times between maintenance, an ElastoStart™ handle, and a high output adjustable oiler.

Features:

• STIHL® M-Tronic™ – A new generation of intelligent engine management that eliminates the low and high speed carburetor adjustment screws, compensates for a dirty air filter, and adjusts for changes in elevation and fuel quality—providing optimum engine power at all times.
• Ematic™ Lubrication System – When used with a STIHL® OILOMATIC® saw chain, the Ematic™ guide bar delivers proper lubrication with up to 50% less oil consumption compared to conventional methods. Specially designed ramps in the guide bar rail direct oil exactly where it’s needed.
• STIHL® ElastoStart™ – A starter handle with a built-in shock absorber that reduces the effort required to pull the starter cord by smoothing out compression forces.
• IntelliCarb™ Compensating Carburetor – Automatically adjusts the air/fuel ratio when the air filter becomes restricted, maintaining correct RPM. Uses clean-side air from the filter for more consistent performance.
• STIHL® Quickstop® – A chain brake designed to stop the chain’s rotation within fractions of a second in certain kickback situations. Can be activated manually or by inertia.
• HD2 Air Filter – Washable filter with a large surface area for longer run times, even in dusty conditions, providing better engine protection and reduced maintenance costs.
• Bumper Spikes – Help prevent pull-in and improve control for easier cutting.
• Adjustable Automatic Oiler – Allows lubrication to be tailored to different bar lengths and cutting conditions.
• Decompression Valve – Temporarily reduces cylinder compression during starting for easier pull starts; closes automatically when the engine fires.
• Lightweight Sprocket Cover with Captive Bar Nuts – Keeps nuts securely in place for more efficient chain maintenance.
• Side-Access Chain Tensioner – Makes chain adjustments more convenient with a bar wrench.
• Master Control Lever™ – Combines choke, starting throttle lock, and on/off switch into one easy-to-use lever.
• Anti-Vibration System – Reduces vibration to minimize operator fatigue and increase comfort.
• Toolless Fuel and Oil Caps with Retainers – Easy to open and close without tools; caps remain attached to prevent loss.
• Throttle Trigger Lockout – Must be engaged before the throttle can be activated for added safety.

Specifications:

• Power Source: Gas
• Powerhead Weight: 16.5 lbs
• Recommended Guide Bar Length: 25 in
• Chain Type: 3/8" RS3
• Chain Oil Capacity: 13.5 oz
• Engine Power: 7.2 bhp
• Fuel Capacity: 28.7 oz
• Engine Displacement: 91.1 cc
• Intended Use: Professional