STHIL MS661-C

The STIHL MS 661 C-M is a top-tier professional chainsaw built for extreme power, durability, and high-performance cutting. Designed for forestry professionals and serious users, this saw is made to handle the toughest jobs with ease.

Powered by a massive 91.1cc engine producing around 7.2–7.3 HP, the MS 661 C-M delivers outstanding cutting performance and an excellent power-to-weight ratio.   Whether you’re felling large hardwood trees or running long bars for milling, this saw has the muscle to get it done.

It features STIHL M-Tronic™ electronic engine management, which automatically adjusts fuel and ignition timing for optimal performance in any condition—no manual tuning needed.   This means easier starts, smoother operation, and consistent power.

Built with professionals in mind, it also includes:

• Advanced anti-vibration system for reduced operator fatigue
• HD2 heavy-duty air filtration for longer service intervals
• High-output adjustable oiler for better lubrication with long bars
• ElastoStart system for easier starting
• Compatible with long bars (up to 36”+) for large timber work  

At around 16 lbs (powerhead only), it balances weight and power exceptionally well for a saw in this class.  

💪 Bottom line: The MS 661 C-M is a true workhorse—perfect for logging, milling, and heavy-duty cutting where smaller saws just won’t cut it.