Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 10.7" Diameter x 10" Pitch Right-Hand Rotation Three-Blade Design Aluminum Black Finish 8M0185642. Overview. There's something special about those mornings when the water's calm and your boat responds exactly how you want it to. That's the feeling the Quicksilver Black Diamond 3-Blade Aluminum Propeller ( 8M0185642) delivers every time you throttle up. It's smooth, predictable, and built to perform-whether you're easing out of the ma