STIHL MS 311 FarmBoss® is designed for cutting firewood in medium-density stands. The redesigned model with weight reduced by 200 grams, a new long-life air filter system with a very long filter life, economical 2-MIX engine, and a decompression valve for an effortless start. Need a heavy-duty chainsaw for tough cutting tasks? The STIHL MS 391 FarmBoss® offers outstanding power and durability for demanding jobs.