XtremepowerUS Electric starts 7HP Engine is offered with a 0.75in Horizontal Keyway Output Shaft, a Tapered Output Shaft (Generator Engine Replacement), Threaded Output Shaft (fits Water Pumps), and a 5/8″ Threaded Output Shaft. Whether it's replacing your old log splitter or completing your go-kart build this Industrial Grade OHV Engine is EPA Certified, extremely quiet, and dependable. Features: It provides enough power to run a wide range of equipment, including log splitters, pressure washers, go-karts, and more Provides industrial-grade strength to get the job done Durable design runs quiy and provides smooth operation The operating fuel is standard 87 Octane or better Gasoline A low oil shutoff functionality turns the engine off to prevent serious damage or failure Specifications: Applications: Go-Karts, Pressure Washers, Trailer Mounted - Mobile Carwashes, Log Splitters, RotoTillers - Cultivators, Water/Trash Transfer Pump Fuel Type: Gasoline Engine Type: Industrial grade OHV gasoline engine Horse Power: 7 Engine Displacement (CC): 212 Max Power: 7HP @ 3600 RPM Starting System: Electric Start Alternate Start System: E-Z Pull Recoil Starter Fuel Tank: 1Gal Oil System: Splash Reduction Type: None Engine Cooling Type: Forced Air Cooling Bore/Stroke: 70 X 55 Shaft Type: Keyed - Straight Shaft Diameter: 3/4" Diameter, 3/16" Keyway Shaft Length: 2-5/8" Total, 2-5/16" Usable Shaft I.D. Thread Size: 5/16"-24 Drilled and Tapped Universal mounting 4 bolt patterns  Overall Dimensions: 12.5"(L) x 15"(W) x 14.25"(H) Package Includes: Shaft Gasoline Engine Manual