Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 14" Diameter x 10" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2028X. Overview. There's a certain rhythm to a good boating day - that steady hum of the motor, the clean lift onto plane, and the easy control as the boat glides where you want it to go. That kind of experience doesn't just happen by chance; it's the result of a well-matched propeller doing its job right. The Quicksilver Black Diamond 3-Blade Al