Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.75" Diameter x 12" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2072X. Overview. There is a certain peace in the rhythm of a boat that runs just right - that smooth surge as you throttle up, the steady hum of a motor working in harmony with the water. That's exactly what you get with the Quicksilver Black Diamond 3-Blade Aluminum Propeller. It's the kind of Mercury propeller you can trust, weekend after we