Mercury - Black Max 3-Blade Aluminum Propeller 12.5" Diameter x 23" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 77350A45. Overview. There's nothing like that feeling when your boat comes alive under your hand the moment the throttle opens up, the hull lifts cleanly, and the water turns to glass beneath you. That's the kind of confidence you get with the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 77350A45). Smooth, strong, and reliable, it's the prop you can cou