Briggs and Stratton 20S232-0063-F1 1450 Series Intek I/C 305cc Engine with 3/4-Inch Diameter by 2-21/32-Inch Length Crankshaft Tapped 3/8-24 Cast iron cylinder sleeve and dual element air filter for extended engine life Overhead valve design (OHV) for cooler operation and longer valve life Float carburetor for consistent, easy starting Maintenance-free Magnetron electronic ignition for quick, dependable starts Emission compliant - for sale in all 50-states