Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 9.3" Diameter x 10" Pitch Right-Hand Rotation 3 Blades Aluminum Black Finish QA3168R. Overview. There's a certain calm satisfaction in feeling your boat move effortlessly through the mirror-like morning water - the air crisp, the motor humming steady, and everything in sync. That's the kind of confidence the Quicksilver Black Diamond 9.3" x 10" Aluminum Propeller brings to every outing. It's simple, dependable, and built to keep you