Mercury - Bravo Three Front Propeller 16" Diameter x 19" Pitch Left-Hand 4-Blade Stainless Steel Matte Finish 8M8022340. Overview. You can feel the difference when a prop is truly dialed in - the boat lifts without strain, the response is instant, and the ride stays quiet and steady. That is the Mercury Bravo Three Front 4-Blade Stainless Steel Propeller (part number 8M8022340). Designed for the Bravo Three dual-prop sterndrive, it is made for big, heavy boats that demand smooth thrust and rock-