Stihl MS 271 Farm Boss® 20"The MS 271 FARM BOSS replaces the mighty MS 270 with a saw thats loaded with features and technology. It starts with a highly efficient engine that delivers 20% longer run times between refuelings while cutting exhaust emissions in half compared to the MS 270. Theres also a pre separation air filtration system thats so effective, your air filter can last up to five times longer (now thats high performance). All engineered into one compact, ergonomic