An entry-level model for cutting firewood, the STIHL MS 170 Mini Boss™ now features the environmentally friendly and economical STIHL 2-MIX engine. It’s easy to operate with a combi-level and includes an automatic STIHL Ematic chain lubrication system for optimum lubrication of the chain. Need a reliable chainsaw for home use? The STIHL MS 171 Mini Boss™ is lightweight and powerful for everyday tasks.