Mercury - Black Max 3-Blade Aluminum Propeller 10.125" Diameter x 15" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 73140A45. Overview. It's a good feeling when your gear just does what it's meant to-no fuss, no surprises, just that smooth, easy confidence every time you turn the key. That's exactly what the Mercury Black Max 3-Blade Aluminum Propeller delivers.. It's the kind of prop that makes boating feel natural, where everything just clicks the way it should. You'l