Briggs and Stratton 356447-3075-G1 570cc 18.0 Gross HP Vanguard Engine with a 1-Inch Diameter by 2-29/32-Inch Length Crankshaft Dura-Bore cast iron cylinder sleeve for extended life Float carburetor for consistent easy starting Maintenance-free Magnetron electronic ignition for quick, dependable starts Cooler cleaner technology efficiently reduces engine and oil temperatures by 25-30 degrees while effectively managing airborne debris 12 Volt electric start