Mercury - Black Max 3-Blade Aluminum Propeller 12.25" Diameter x 9" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 87818A45. Overview. Ask any boater what they want from their prop, and most will say the same thing, smooth performance they can trust. The Mercury Black Max 3-Blade Aluminum Propeller ( 87818A45) delivers exactly that. It's not about flash or fancy talk, it's about a prop that simply works, trip after trip. When you ease out of the marina or open up across calm mor