23hp Briggs Vanguard 627cc 1-1/8" x 4" shaft, tapped 7/16" with keyway. Cast iron sleeves, fuel pump, full pressure lube w/ oil filter and oil cooler system, electric start w/ 16amp alternator and auxiliary recoil. Less fuel tank, less muffler. Oil CoolerHas starter and throttle controls on engine. The Small Block V-Twin Vanguard engine is designed-engineered to handle the most demanding commercial applications. Energetic and quick starting, these powerhouse engines feature a number of advanced technologies and integrated components, while also being lighter and more compact than leading competitor's engines. There are no substitutes when it comes to keeping engine powered equipment healthy, to maximize engine life, meet original equipment specs and provide full warranty coverage, always use genuine parts from Briggs & Stratton