STIHL MS 661 C-M 20" Magnum® Gas-Powered Chainsaw is engineered for demanding professionals who require powerful and reliable performance for large-scale tree felling and heavy-duty cutting tasks. This chainsaw features advanced STIHL M-Tronic™ engine management technology that automatically adjusts to changing conditions, delivering consistent power output and up to 20% greater fuel efficiency than previous models. Its impressive power-to-weight ratio, combined with the durable HD-2 long-life air filter and the comfortable ElastoStart™ handle, ensures extended runtime and easier starting. The Ematic™ Lubrication System with a high output adjustable oiler provides efficient and customizable chain lubrication, while the IntelliCarb™ Compensating Carburetor maintains optimal engine performance even in challenging environments. Designed to meet the needs of professionals, the MS 661 C-M exceptional power, precision, and durability for the toughest jobs, along with reduced vibration to increase operator comfort. Model Number: MS 661 C-M 20