Briggs & Stratton 21R707-0079-F1 vertical Intek is 344cc and puts out 10.5 HP (maximum horsepower). This Intek has a 1″ x 3-5/32″ crankshaft with a 1/4″ keyway and comes equipped with a recoil starter, 12V electric starter, 16A alternator, fuel tank and fuel pump. It replaces model 219807-4028-F1. Briggs & Stratton Intek engines offer consistent starting and rugged components like Dura-Bore cast iron cylinder sleeves and Dual-Clean pleated paper filters to handle the toughest mowing applications. This model is designed for zero-turn mowers, riding mowers and tractors with large mowing decks. Buyer protection package provides two-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.