Mercury/Mariner/Mercruiser 4 blade aluminum prop 15 x 16. Includes the Flo-Torq II hub kit. Designed to fit Mercury/Mariner 135, 150, 175, 200, 225, 250 HP outboards and Mercruiser Alpha and Bravo One under 400 hp (3.0L, 4.3L, 4.3LH, 4.3L EFI, 5.0L, 5.0L EFI, 5.7L, 5.7L EFI, 350 MAG MPI). Four-blade performance at an aluminum price. The Alpha 4 is an outstanding propeller for runabouts as well as daycruisers. Bolt this prop on and your boat should get on plane quicker and stay on plane at a lower speed than with a comparable 3-blade propeller. Great watersports prop! For V-6 outboards and Alpha and Bravo One sterndrives. 4 blade die-cast aluminum. Durable high-gloss phantom black finish. Better acceleration and handling than 3 blade.
20" Alpha 4 replaces 21" three-blade prop
18" Alpha 4 replaces 19" three-blade prop
16" Alpha 4 replaces 17" three-blade prop
Equipped with Flo-Torq II hub system