Mercury - Enertia 3-Blade Stainless Steel Propeller 15.6" Diameter x 13" Pitch Right-Hand Rotation 3-Blade X7 Stainless Steel Polished Finish 8M0151227. Overview. Every boater knows that perfect moment - the throttle goes down, the bow lifts, and your boat just moves. The Mercury Enertia 3-Blade Stainless Steel Propeller (Part Number 8M0151227) delivers that kind of feeling every single time. It's crisp, responsive, and powerful, transforming every acceleration into a smooth surge forward. Built