Mercury - Black Max 3-Blade Aluminum Propeller 10.25" Diameter x 14" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 73138A45. Overview. There's a certain kind of peace that comes from knowing your boat will respond exactly how you expect. The Mercury Black Max 3-Blade Aluminum Propeller delivers that confidence every time you drop it into gear. It's not flashy or overcomplicated-it's simply built to perform, season after season. You'll feel it in the smooth lift, the ste