Briggs & Stratton 31R907-0006-G1 vertical OHV Intek engine is 500cc and puts out 17.5 gross HP. This single cylinder Briggs & Stratton Intek has a 1″ x 3.157″ crankshaft. The engine has a recoil starter and a 12V electric starter with a 9A alternator. It is equipped with a muffler, but does not include a fuel pump. The 31R907-0006-G1 replaces 31C707-3005-G5. Briggs & Stratton Intek series engines deliver the reliable, efficient power needed for riding lawn mowers and tractors. Buyer protection package provides a two-year limited consumer warranty. 50-State CARB Compliant. All engines purchased from us ship for free and are foam packed for added protection during transit.