Mercury - Quicksilver Black Diamond Bravo Two Propeller 20" Diameter x 11" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish 8M0155024. Overview. There's a quiet satisfaction that comes when your boat feels balanced, smooth, and ready for anything. The Quicksilver Black Diamond Bravo Two Propeller (Part Number 8M0155024) captures that feeling perfectly. It's not about flash or overkill-it's about dependable performance, steady thrust, and the kind of reliability that makes you forget it's