The STIHL MS 171 Miniboss Chainsaw is the modern chainsaw for grounds maintenance. Side-mounted chain tensioning for safe and easy chain tensioning. Extensive features such a long-life air filter system prevents the air filter from prematurely clogging and STIHL anti-vibration system. Great for cutting firewood, for building and for felling small trees. Up to 20% less fuel consumption and up to 70% fewer emissions compared to STIHL two-stroke engines of the same performance class without 2-MIX technology.