The Briggs & Stratton 844717 21HP Starter Motor provides dependable electric starting power for compatible engines, helping turn the engine over for ignition. When activated, the starter motor uses electrical energy from the battery to rotate the engine's flywheel or crankshaft until the engine begins running. Its reliable operation supports consistent starting and reduces the effort ... https://www.wholetoolbox.com/briggs-stratton-844717-21hp-starter-motor/844717.html