Mercury - Black Max 3-Blade Aluminum Propeller 15.5" Diameter x 18" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 11324A45. Overview. Something is reassuring about the Mercury Black Max 3-Blade Aluminum Propeller (11324A45), it's that dependable prop you can always count on when the day calls for smooth cruising or a little spirited throttle. Boaters who've run one know the feeling: a quick bite out of the hole, a steady lift, and that satisfying hum when everything's dialed in