Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.7" Diameter x 11" Pitch Right-Hand Rotation Three-Blade Design Aluminum Black Finish 8M0185643. Overview. There's a kind of peace that comes with being on the water early in the morning the hum of the engine, the gentle lift as the boat glides across glassy waves, and that instant response when you throttle up. The Quicksilver Black Diamond 3-Blade Aluminum Propeller ( 8M0185643) captures that feeling. It's smooth, predictable, an