A-B1591760-AI FLYWHEELOne New Aftermarket Replacement Flywheel Fits Briggs and Stratton Small Engines This aftermarket replacement flywheel is designed for use with Fits Briggs and Stratton (B&S) small engines found in lawn and garden equipment. The flywheel mounts on the top of the crankshaft, where the starter engages it to spin the engine during starting. It also stores rotational energy during the engine's power stroke for smooth, consistent operation, and houses the