Honda GX630 QZB3 Horizontal Engine V-Twin horizontal OHV engine is 630cc and puts out 20.8 net HP. This Honda V-Twin GX has a 1″ x 2-29/32″ crankshaft with a 1/4″ keyway (Tapped 3/8-24). The engine has electric start, 12V 17 amp charging coil, control box with switch and manual controls, oil alert system, and oil filter parallel to crankshaft. A muffler is not included, but options are available for purchase on our website. Honda GX630 commercial V-Twin engines deliver economical and quiet operation without sacrificing superior performance and reliable power. Common applications for this engine include water pumps, small vehicles, commercial lawn and garden equipment, generators and more. Buyer protection package provides three-year commercial engine warranty. 50-State CARB Compliant. All engines purchased from us ship for free and are foam packed for added protection during transit.