Mercury - Black Max Propeller 7.375" Diameter x 7" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 815084A02. Overview. There is a reason boaters keep coming back to the Mercury Black Max series - it is dependable, predictable, and built for the kind of days on the water that make you forget about everything else. The Mercury Black Max 3-Blade Aluminum Propeller combines lightweight performance with steady, confident handling. It is designed to keep small outboards smooth