STIHL MS 881: The world's most powerful series-production chainsaw With an output of 6.4 kW, the STIHL MS 881 is the world's most powerful series-production chainsaw. This extremely capable saw is entirely in its element when used for professional harvesting of large trees and in mobile sawmills. The robust MS 881 with advanced 2-MIX engine, captive nuts, and stop button function is extraordinarily durable and easy to maintain. The efficient HD2 filter increases service life. The premium oil pump ensures optimum oil flow.