Mercury - Quicksilver Black Diamond Bravo Two Propeller 19.25" Diameter x 15" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish 8M0155028. Overview. Every boater knows that feeling - when your boat glides forward effortlessly, the throttle feels smooth in your hand, and the engine hums in sync with the water. The Quicksilver Black Diamond Bravo Two Propeller (Part Number 8M0155028) was built for that exact kind of connection. It is not flashy or overbuilt-it is simply dependable, deliveri