Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 11.3" Diameter x 10" Pitch Right-Hand Rotation 3-Blade Aluminum High-Gloss Black Finish QA2064X. Overview. If you've spent any time behind the wheel of a boat, you know how much a good propeller can change everything - from the way the boat lifts out of the water to how it feels at cruising speed. The Quicksilver Black Diamond 11.3" x 10" Pitch Propeller (QA2064X) is one of those simple, dependable upgrades that just works. It's smoo