Mercury - Vengeance 3-Blade Stainless Steel Propeller 14" Diameter x 10" Pitch Right-Hand Rotation 3 Blades Stainless Steel Polished Finish 8M0151397. Overview. If you've spent any time behind the wheel of a Mercury-powered boat, you know how much a good prop can change everything. The Mercury Vengeance 3-Blade Stainless Steel Propeller (8M0151397) isn't about flashy marketing-it's about trust on the water. You'll feel it when you throttle up, that smooth pull as the boat glides onto plane, the