Briggs & Stratton 15D112-0007-E8 250cc 11.5 Gross Torque Snow Series Engine With A 3/4-Inch Diameter x 4-27/64-Inch Length 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