Mercury - Black Max 3-Blade Aluminum Propeller 13" Diameter x 19" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 77346A45. Overview. There's a moment every boater loves the instant your boat lifts onto plane, smooth and sure, with power that feels perfectly matched to your touch. That's what you get with the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 77346A45). It's reliable, responsive, and built to perform day after day without demanding attention. You'll feel i