Stihl MS 661 C-M Magnum Chainsaw

The Stihl MS 661 C-M Magnum is a professional chainsaw with enhanced fuel efficiency and STIHL M-Tronic™ technology.

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 Stihl MS 661 C-M Magnum chainsaw also delivers less vibration and 20% greater fuel efficiency than the MS 660. 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. (The wrap-handle version is available in select areas.) See MS 661 R C-M.

Features
Specifications
Features

• Reduced-Emission Engine Technology – Caring for Nature
  The STIHL Inc. “Caring for Nature” seal identifies its powered products that are more environmentally conscious, producing zero or low exhaust emissions. STIHL Inc. defines “low exhaust emissions” as cleaner than EPA and CARB exhaust emission standards.
• STIHL M-Tronic™This product features M-Tronic™ (M) – a new generation of Intelligent Engine Management that eliminates the low and high-speed carburetor adjustment screws, compensates for a dirty air filter, and changes in elevation and fuel quality for optimum engine power at all times.See it in action!
• Decompression Valve
  The decompression valve also called a ‘deco’ or ‘deco valve,’ vents compression in the cylinder for easier starting. It temporarily reduces the compression in the combustion chamber during cranking and helps reduce the effort needed to pull the starter rope. It is opened manually and closes automatically as soon as the engine fires.
• STIHL ElastoStart™
  The ElastoStart™ starter handle is an exclusive STIHL feature. It is a starting grip with a built-in shock absorber that helps reduce the effort when pulling on the starter cord. The ElastoStart™ starter grip noticeably reduces the sudden peak forces (compression) usually felt during cranking. The forces at the grip after the first compression stroke are smoothed out.
• Adjustable Automatic Oiler
  The Adjustable Automatic Oiler allows users to adjust the guide bar and saw chain lubricant for different bar lengths and cutting conditions.
• Side-Access Chain Tensioner
  The side-access chain tensioner makes it much more convenient for the user to adjust the saw chain with a bar wrench as opposed to the classic location of the guide bar adjustment screw.
• Anti-Vibration System
  STIHL has developed a system for minimizing the vibration levels of handheld outdoor power equipment. The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience.

Specifications

Note: STIHL recommends #3624 (33 RS3 84) OILOMATIC® saw chain and 25″ 3003 000 4030 Ematic™ guide bar combination. Compatible guide bar ranges: 16″ to 32″