Gas powered chainsaw features a 40.2 cc professional-grade 2-stroke gas engine Comes with 18 in. bar and chain provides reliable cutting performance i-30 starting system with digital ignition delivers easy starting and smooth acceleration Tool-less, easy access air filter Heavy-duty air filter increases engine life Side-access chain tensioner enables quick and easy adjustments Automatic oiler keeps the chain lubricated for smooth operation G-force engine air pre-cleaner maintains clean air supply to engine, helping protect against dust and debris