Mercury - Black Max 3-Blade Aluminum Propeller 15" Diameter x 17" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 832828A45. Overview. There's a reason so many boaters stick with the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 832828A45), it's dependable, smooth, and simply feels right on the water. It's the kind of prop that delivers power without harshness, giving you confidence every time you push the throttle. Whether you're running across glassy morning water o