Mercury - Vengeance 3-Blade Stainless Steel Propeller 13.8" Diameter x 21" Pitch Right-Hand Rotation 3 Blades Stainless Steel Polished Finish 8M0151408. Overview. Every seasoned boater knows the difference between a prop that simply moves the boat and one that brings it to life. The Mercury Vengeance 3-Blade Stainless Steel Propeller (Part Number 8M0151408) is built for that kind of connection-the one where throttle response feels instant, handling feels natural, and the water feels like an exte