50.1cc commercial grade PureFire engine provides clean, powerful performance with less fuel consumption * Decompression valve, primer bulb and auto return choke for starting easy and warm-up * Automatic and adjustable oiler so user can adjust oil flow to the bar and chain * Bumper spikes and sprocket nose bar provides added control for easier cuts * Comes with a 7-year consumer, 2-year commercial and 1-year rental warranty