Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.2" Diameter x 15" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish QA2084X. Overview. There's something satisfying about a prop that simply does its job-every time you push the throttle, it delivers. The Quicksilver Black Diamond Aluminum Propeller is that kind of dependable workhorse. You'll feel the smooth pull of power as your boat rises onto plane and holds steady through the turns. It's built for boaters who value bal