The STIHL MS 661 is a professional-grade chainsaw designed for heavy-duty tasks like logging and felling large trees. Powered by a 91.1cc engine, it offers exceptional power and performance with STIHL’s M-Tronic system for easy starting and consistent output. Equipped with a 36" bar and 3/8" chain, it’s built for demanding applications, while its anti-vibration system and ergonomic design ensure comfort during long hours of work.