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-CH740-3117 ? Specs Grade Commercial ? Cylinders: V-Twin ? Cooling: Air ? Fuel Type: Gasoline ? Bore: 3.3″ ? Stroke: 2.6″ ? Compression Ratio: 9.0:1 ? Dimensions(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