Mercury - Enertia 3-Blade Stainless Steel Propeller 14.75" Diameter x 16" Pitch Right-Hand Rotation 3-Blade X7 Stainless Steel Polished Finish 8M0151233. Overview. There's a moment every boater chases - that smooth lift onto plane when the boat feels weightless and perfectly balanced under your hands. The Mercury Enertia 3-Blade Stainless Steel Propeller (Part Number 8M0151233) delivers that sensation every single time. It's crisp, responsive, and strong enough to make you forget what "lag" ever