Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.5" Diameter x 11" Pitch Right-Hand Rotation 3-Blade Aluminum High-Gloss Phantom Black Finish QA3114R. Overview. There's a certain peace in knowing your prop will do its job every time that steady grip on the water, that smooth lift when you throttle up, that quiet push that just feels right. The Quicksilver Black Diamond 10.5" x 11" Pitch Propeller (QA3114R) delivers that feeling. It's the kind of prop you trust not because it's f