Mercury - Enertia ECO 3-Blade Stainless Steel Propeller 16" Diameter x 21" Pitch Right-Hand Rotation 3-Blade Stainless Steel 8M0151259. Overview. You know that feeling when your boat hits its stride smooth, efficient, and perfectly balanced? That's what the Mercury Enertia ECO 3-Blade Stainless Steel Propeller ( 8M0151259) is built to deliver. Whether you are running long stretches across open water or cruising comfortably at midrange speeds, this prop gives you more range, less fuel burn, and a