Mercury - Black Max 3-Blade Aluminum Propeller 10.62" Diameter x 12" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 73134A45. Overview. There's something reassuring about a prop that just works-trip after trip, tide after tide. The Mercury Black Max 3-Blade Aluminum Propeller (Part Number 73134A45) has that dependable feel. It's the kind of prop you install once and forget about because it does everything you ask without complaint. You'll notice how smoothly your outboard jumps