Mercury - Black Max 3-Blade Extra Cup Aluminum Propeller 16" Diameter x 12" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Black Finish 16436CP1. Overview. There's something about the sound of the motor, the clean bite of the prop, and that smooth surge forward that tells you-you've got the right setup. The Mercury Black Max 16 x 12 Extra Cup Aluminum Propeller (Part Number 16436CP1) is one of those trusted pieces of gear that just works. It's the kind of prop you keep on because it performs