Mercury - Black Max 3-Blade Aluminum Propeller 7.8" Diameter x 8" Pitch Right-Hand Rotation 3 Blades Aluminum Glossy Phantom Black Finish 812950A02. Overview. There is something reassuring about using a prop that just feels right - steady, smooth, and responsive, no matter where you take your boat. The Mercury Black Max 3-Blade Aluminum Propeller is exactly that kind of trusted gear. It's designed to give smaller Mercury outboards dependable push and clean control with every run. From easing awa