Kohler CH620-3103 horizontal 4-cycle OHV V-Twin Command Pro engine is 674cc and puts out 18 HP (maximum horsepower). This CH620 has a 1-1/8″ x 4″ crankshaft. It features a 12V electric solenoid shift starter and a 15-amp regulated alternator. This model replaces PA-62500 and PA-CH620-3002. Kohler Command Pro engines have tough features like mechanical fuel pumps and hydraulic valve lifters while remaining user-friendly, efficient and reliable. CH620 Series engines can be used for a variety of applications including utility vehicles, two-wheel tractors, feeders, conveyors and more. Buyer protection package provides a three-year engine warranty. 50-State CARB Compliant. All engines purchased from us ship for free and are foam packed for added protection during transit.