Modern chainsaw for grounds maintenance, the STIHL MS 171 Mini Boss™ features side-mounted chain tensioning for safe and easy chain adjustment. Extensive features such as a long-life air filter system prevent the air filter from prematurely clogging and STIHL anti-vibration system. Great for cutting firewood, building, and felling small trees, the STIHL MS 171 Mini Boss™ is a versatile tool for various tasks. 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. Looking for a dependable chainsaw for simple cutting jobs? The STIHL MS 180 Mini Boss™ is compact and easy to handle.