Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.5" Diameter x 13" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2076X. Overview. There is a kind of peace that comes when everything on your boat just works together - when the throttle feels smooth, the motor hums just right, and the boat lifts cleanly onto plane without effort. The Quicksilver Black Diamond 3-Blade Aluminum Propeller delivers that feeling every time you take it out. It's dependable, stead