Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 8.9" Diameter x 7.5" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2154R. Overview. There is something deeply satisfying about the way a well-balanced prop moves through water - the hum of the engine, the smooth lift, the steady glide that feels effortless. That's what the Quicksilver Black Diamond 3-Blade Aluminum Propeller delivers. It is reliable, forgiving, and built for boaters who appreciate smooth contr