Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 14" Diameter x 13" Pitch Right-Hand Rotation 3-Blade Aluminum High-Gloss Phantom Black Finish QA2832X. Overview.. There's something special about a prop that just works one that gives your boat that smooth, confident feel every time you open the throttle. The Quicksilver Black Diamond 14" x 13" Pitch Propeller (QA2832X) is that kind of prop. It doesn't try to impress with flash; it earns your trust with balance, control, and dependab