SFI certified billet aluminum flywheel for the Briggs & Stratton 5 HP flathead engine. The keyway is installed to advance the ignition timing to 30° BTDC. The flywheel weighs 4.05 lbs. You can use either the stock pull starter or a hand-held electric starter with this flywheel. Priced less than the last available price of the stock OEM cast iron flywheel.