Mercury - Black Max 3-Blade Aluminum Propeller 12" Diameter x 10.5" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 42740A45. Overview. There's a certain peace of mind that comes with using gear you can depend on - the kind that never makes a fuss, never surprises you, and just does its job right every single time. That's exactly what you get with the Mercury Black Max 3-Blade Aluminum Propeller. It is smooth, steady, and built for boaters who'd rather spend their day on