A-B14181-AI KEY (10 X 222698S)Ten New Aftermarket Replacement Flywheel Keys Fits Briggs and Stratton Small Engines This pack of 10 aftermarket replacement flywheel keys (222698S) aligns the flywheel in the correct position on the crankshaft. The flywheel key also acts as a safety shear component if the engine stops suddenly after striking a hard object, the key shears in half to protect the engine from damage. A broken or missing flywheel key will prevent the engine from starting.