Mercury - Bravo I OC Lab Finished Racing Propeller - 4-Blade - 150 to 400 HP Outboard Only - 14.75 Dia. - 28 Pitch - 48-8M0092003 The Lab Finished Bravo I OC propeller is designed for Outboard Catamarans equipped with Sport Master gearcase or single outboard high-speed boats. The four blades with (8) PVS vent holes offer excellent planing, great handling, awesome mid-range acceleration, and the tuned shortened exhaust tube provides bow and minimal stern lift for awesome top-end speed. The Mercury Bravo I OC propeller fits 150 to 400 HP Mercury outboard models only.