Briggs & Stratton 15D114-0017-E8 250cc 11.50 Gross Torque Snow Series Engine With A 3/4-Inch Diameter x 2-27/64-Inch Crankshaft, Keyway, And Tapped 3/8-24 Kool Bore Aluminum alloy bore for cooler operation Super Lo-Tone muffler for quiet operation Float carburetor for consistent, easy starting 12 Volt electric start CARB Compliant