Mercury - Black Max 3-Blade Aluminum Propeller 9.25" Diameter x 10" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 897752A11. Overview. Every boater knows that feeling when the boat glides onto plane without effort, the engine hums smoothly, and everything just comes together perfectly. That's what the Mercury Black Max 3-Blade Aluminum Propeller (Part Number 897752A11) delivers - smooth, confident power that makes every trip more enjoyable. It's the kind of prop you install onc