Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 9" Diameter x 8" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish QA2126R. Overview. There's something special about those quiet early mornings on the water-the air still cool, the reflection smooth, and your engine ready to hum to life. The Quicksilver Black Diamond 9" x 8" Aluminum Propeller is built for exactly those moments. It's not flashy or overcomplicated-it's dependable, balanced, and trustworthy, the kind of prop th