Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.5" Diameter x 13" Pitch Right-Hand Rotation Three-Blade Design Aluminum Black Finish 8M0185645. Overview. There's nothing like the feeling of being out on the water when your boat runs just the way it should steady, smooth, and responsive the Quicksilver Black Diamond 3-Blade Aluminum Propeller (8M0185645) delivers that kind of dependable performance every time. It's built for boaters who appreciate consistency more than flash tho