Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 9" Diameter x 10.5" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2130R. Overview. Every boater knows that feeling - when your boat glides out of the harbor and you can sense that the prop is working in perfect sync with the engine. That smooth, confident push forward, steady through turns and easy to handle in tight spots. The Quicksilver Black Diamond 3-Blade Aluminum Propeller delivers exactly that. It's bu