Briggs & Stratton 386777-3036-G1 vertical Vanguard engine is 627cc and puts out 23.0 HP (maximum horsepower). This Vanguard V-Twin has a 1″ x 3-3/16″ crankshaft with a 1/4″ keyway and is equipped with an electric starter. Briggs & Stratton Vanguard engines are made to be lightweight and compact while taking on the most demanding commercial jobs. Featuring dependable components like float feed carburetors, cast iron cylinder sleeves and full pressure lubrication, Vanguard engines provide reliable power in a smaller space. Common applications include golf/turf equipment, power packs/generators and commercial mowers. Buyer protection package provides three-year limited consumer engine warranty. 50-State CARB Compliant. All engines purchased from us ship for free and are foam packed for added protection during transit.