A-B1590463-AI CAMSHAFTOne New Aftermarket Replacement Camshaft Fits Briggs and Stratton Small Engines This aftermarket replacement camshaft fits select Fits Briggs and Stratton (B&S) small engines used in lawn mowers, riding mowers, and other outdoor power equipment. The camshaft controls the precise opening and closing of the intake and exhaust valves, regulating airflow and combustion timing to keep the engine running smoothly and efficiently. It includes a governor gear