Mercury - Enertia 3-Blade Stainless Steel Propeller 14.25" Diameter x 18" Pitch Right-Hand Rotation 3-Blade X7 Stainless Steel Polished Finish 8M0151237. Overview. There is nothing quite like that feeling you get on the water when the throttle goes down and the boat seems to lift and glide with effortless power. The Mercury Enertia 3-Blade Stainless Steel Propeller (Part Number 8M0151237) delivers exactly that. It's fast, steady, and remarkably responsive - the kind of prop that turns ordinary a