Mercury - Black Max 3-Blade Aluminum Propeller 10.375" Diameter x 12" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 19639A40. Overview. There's a special kind of confidence that comes from using a propeller that simply works. You feel it the moment you open up the throttle and the boat responds exactly how you hoped-steady, balanced, and smooth. That's what the Mercury Black Max 3-Blade Aluminum Propeller is known for. It's earned a place on countless boats because it n