Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 9.3" Diameter x 10" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish QA2175R. Overview. There's a certain kind of satisfaction in knowing your boat responds exactly the way you expect it to. The Quicksilver Black Diamond 3-Blade Aluminum Propeller gives you that feeling - smooth, sure, and easy every time you throttle up. Whether you're gliding out for an early morning of fishing or cruising back toward the dock at sun