Oregon 02-403 Flywheel Key Fits Toro Lawn Boy Fits Cub Cadet Engines NEWOne New Aftermarket Replacement Flywheel Key (Oregon 02 403) for Tecumseh Powered Toro, Lawn Boy, and Cub Cadet Engines This offset flywheel key is designed for Tecumseh small engines equipped with solid state (electronic) ignition systems. The flywheel key locates the flywheel on the crankshaft to set ignition timing; it is engineered to shear on sudden engine stoppage, protecting the flywheel and crankshaft from damage. Replaces Oregon part number