Mercury - Black Max 3-Blade Aluminum Propeller 10.375" Diameter x 11" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 19638A40. Overview. There is a certain confidence that comes from using gear you trust - the kind that responds exactly how you expect, no matter the conditions. That is what the Mercury Black Max 3-Blade Aluminum Propeller delivers every time you drop it into gear. It's steady, responsive, and built for boaters who want a smooth ride without the fuss. Whe