Mercury - Black Max 3-Blade Aluminum Propeller 13.75" Diameter x 15" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 77342A45. Overview. Every boater recognizes the thrilling moment when their boat lifts onto plane, smooth and sure, with effortless and controlled power. That's what you'll experience with the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 77342A45). It's the kind of prop that makes boating simple, reliable, and enjoyable. You'll feel it in how quickly t