Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 9.3" Diameter x 11" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish QA3170R. Overview. There's something peaceful about those early moments on the water - the quiet hum of the motor, the gentle ripple of the wake, and the feeling that everything is working just as it should. The Quicksilver Black Diamond 9.3" x 11" Aluminum Propeller was built for that exact kind of dependability. It's a prop that doesn't call attention to i