The BRIGGS & STRATTON 84005207 Engine Camshaft helps control the timing of the engine's valve operation for proper combustion and performance. This camshaft rotates with the engine and uses its lobes to operate the intake and exhaust valves at the required intervals. Proper valve timing supports efficient airflow, consistent engine operation, and reliable performance. Replacing a worn... https://www.wholetoolbox.com/briggs-stratton-84005207-engine-camshaft/84005207.html