The BRIGGS & STRATTON 84004837 Engine Regulator 20 AMP helps control and regulate the engine’s electrical charging output for consistent system operation. Installed within the charging system, the regulator manages voltage from the engine’s charging components to help maintain an appropriate electrical supply for the battery and other connected components. Proper regulation helps prot... https://www.wholetoolbox.com/briggs-stratton-84004837-engine-regulator-20-amp/84004837.html