Gasoline Engine Engine Series Vanguard Gross Torque Not Applicable Horsepower 31 hp Shaft Orientation Horizontal Shaft Configuration Crankshaft 1-1/8 x 4-19/64 Tapped 7/16-20 1/4 Keyway Shaft Diameter 1 1/8 in Shaft Length 4 in Start Type Electric Maximum Speed 3 600 RPM Muffler Yes CARB Compliant CARB Non-Compliant Engine Brand Briggs and Stratton Engine Displacement 896 cc Engine Cycle 4-Cycle