CH740 25 HP Horizontal Engine Overhead Valve Design Hydraulic Valve Lifters Cast Iron Cylinder Liner Full Pressure Lubrication Oil Sentry Fuel Shutdown Solenoid Mechanical Fuel Pump Smart-Choke Carburetor 12-Volt Solenoid Shift Starter Fits Model EXMARK Exmark Replaces OEM Kohler PA-CH740-3117Specs Grade CommercialCylinders: V-TwinCooling: AirFuel Type: GasolineBore: 3.3″Stroke: 2.6″Compression Ratio: 9.0:1Dimensions(LxWxH): 14″ x 17.7″ x 19″Warranty: 2 Year Commercial Warranty Shaft Size 1-1/8″ x 2-3/4″ Power 25 HP Displacement 725cc