Briggs & Stratton 305cc 1450 Series Engine with 1-Inch Diameter x 3-21/32-Inch Length Crankshaft Tapped 7/16-20 205332-0537-B1 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 Non-CARB Compliant/Not For Sale In California