Mercury - Quicksilver Black Diamond Bravo Two Propeller 17.5" Diameter x 23" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish QA1952R. Overview. There is a certain confidence that comes from knowing your prop can handle anything you throw at it - from heavy hulls to long, steady runs in open water. The Quicksilver Black Diamond Bravo Two Propeller delivers that kind of trust. It's strong, balanced, and built for boats that demand more push than most props can give. You'll feel it the mom