Gasoline Engine Engine Series CH730 Series Gross Torque 38.4 lb-ft Horsepower 23.5 hp Shaft Orientation Horizontal Shaft Configuration 1.437 in Diameter x 4.453 in length.375 Keyway drilled and tapped7/16 - 14 x .83 in Deep Shaft Diameter 1.437 in Shaft Length 4 7/16 in Start Type Electric Maximum Speed 2 800 RPM Muffler No CARB Compliant CARB Compliant Engine Brand Kohler Engine Displacement 725 cc Engine Cycle 4-Cycle Overall Depth 14 in