Mercury - Bravo I Propeller 15.25" Diameter x 22" Pitch Left-Hand Rotation 4-Blade Stainless Steel Polished Finish 8M0151210. Overview. There's a certain thrill that comes from opening up the throttle and feeling your boat lift, steady, and slice through open water. The Mercury Bravo I Propeller ( 8M0151210) captures that moment perfectly the balance between raw power and smooth control. It's the kind of prop that feels alive under your hand, ready to grip hard, hold true, and respond instantly