Mercury - Trophy Sport 4-Blade Stainless Steel Propeller 10.625" Diameter x 13" Pitch Right-Hand Rotation 4-Blade Stainless Steel Polished Finish 878614A46. Overview. Some props don't just move your boat, they change how it feels on the water. The Mercury Trophy Sport 4-Blade Stainless Steel Propeller (Part Number 878614A46) does precisely that. It's built for boaters who love quick lift, smooth handling, and rock-solid control when running skinny flats or winding bay channels. Every throttle pu