Mercury - Black Max Propeller 12.5" Diameter x 8" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 42738A45. Overview. There's something about a propeller you can rely on that gives you peace of mind every time you hit the water. The Mercury Black Max 3-Blade Aluminum Propeller isn't fancy-it's dependable, smooth, and built to handle the realities of boating. It grips the water with confidence, accelerates cleanly, and stays steady when the wind and waves try to throw you