The Briggs & Stratton 591759 Flywheel helps maintain engine rotation and supports smooth operation in compatible small engines. It stores rotational energy as the crankshaft turns and helps keep engine speed consistent during operation. The flywheel also works with the ignition system to support proper engine timing. Replacing a damaged or worn flywheel can help restore engine functio... https://www.wholetoolbox.com/briggs-stratton-591759-flywheel/591759.html