Mercury - Black Max 3-Blade Aluminum Propeller 13.25" Diameter x 17" Pitch Right-Hand Rotation 3-Blade Aluminum Phantom Black Finish 77344A45. Overview. Every boater knows that dependable performance is what makes time on the water delightful. The Mercury Black Max 3-Blade Aluminum Propeller (Part Number 77344A45) delivers that steady, trustworthy feel that's made it a favorite among weekend boaters and pros alike. It's the kind of prop you install once and forget about it simply does its job wi