STIHL® MS 500i – 25in Chainsaw | 79.2cc STIHL® Gas EngineThe STIHL MS 500i is a revolutionary professional chainsaw designed for forestry personnel and tree service professionals who demand maximum performance and rapid acceleration. As the worlds first chainsaw with electronically controlled fuel injection, the MS 500i delivers instant throttle response, an exceptional powertoweight ratio, and consistent performance in demanding cutting environments. Key Features 79. 2cc gas powered engine delivers