The Honda 31100-ZE7-010 Standard Flywheel helps maintain smooth engine operation by supporting rotational balance and ignition timing in compatible Honda small-engine applications. Mounted on the engine crankshaft, the flywheel stores rotational energy to help keep the engine running consistently between combustion cycles. It also works with the ignition system to support spark genera... https://www.wholetoolbox.com/honda-31100-ze7-010-standard-flywheel/31100-ZE7-010.html