Mercury - Quicksilver Black Diamond Bravo Two Propeller 19.5" Diameter x 13" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish 8M0155026. Overview. There is a moment on the water when everything just feels right: the engine hums in rhythm, the boat glides steadily, and you know your prop is doing exactly what it should. The Quicksilver Black Diamond Bravo Two Propeller (Part Number 8M0155026) brings that feeling to life. It is built for boaters who care about dependable performance, smoot