Mercury - Enertia 3-Blade Stainless Steel Propeller 15.3" Diameter x 14" Pitch Right-Hand Rotation 3-Blade X7 Stainless Steel Polished Finish 8M0151229. Overview. There is nothing quite like the feeling when your boat lifts smoothly onto plane - steady, powerful, and perfectly in sync with your throttle. The Mercury Enertia 3-Blade Stainless Steel Propeller (Part Number 8M0151229) delivers that experience every time you hit the water. It's fast, responsive, and engineered to make your boat feel