Mercury - Black Max Propeller (Black) 10" Diameter x 7" Pitch Right-Hand Rotation 4 Blades Aluminum Glossy Phantom Black Finish 812950A10. Overview. There's a certain satisfaction that comes with complete control - when your boat responds instantly to your touch, moving exactly the way you want it to. The Mercury Black Max 4-Blade Aluminum Propeller (Black) gives you that kind of confidence on the water. Designed for kicker motors and small outboards, it delivers smooth steering, steady trolling