The Revolution 4 propeller will fit Mercury and Mariner 2-cycle and 4-stroke outboards from 135 hp and MerCruiser Alpha One, Bravo One and TRS stern drives. Mirage Plus propellers have forward exhaust ventilation holes that come equipped with the PVS (Performance Vent System) plugs. The size of hole in the PVS are used to vary hole shot engine RPM's and acceleration to best match the boat and boating application. See your owner's manual for the Flo-Torq hub, thrust washers and prop nut part numbers to best fit your engine or drive with this propeller. This propeller will also accept Flo-Torq SSR HD hub for engines or drives with 1.25" prop shafts. Mercury Marine’s passion for performance is matched by your drive for the new, the unknown. Our legendary reliability and durability let you boldly embrace your next adventure—large or small—knowing you’re backed by the best quality design, engineering, and materials.