All Solo saws have a high power-to-weight ratio and Nikasil silicon carbide-coated cylinders for durability. The Solo 65620 uses anti-vibration technology for added comfort and reduced fatigue as well as an easy-start primer. The included Eco-matic oiling system delivers no oil at idle and increases delivery along with higher RPM. Also included are fingertip choke and throttle controls. ANSI safety features include chain brake hand guards chain catcher throttle interlocks and reduced kickback bars and chains. CD Ignition and Automatic half throttle choke setting for starting ease are also included. 50.9CC 4HP Solo 2-Cycle engine. 20oz gas tank capacity Electronic Ignition 20 inch bar Chain Pitch is 0.325 inch. Item Weight is 11.5lbs. 2 Year Warranty.