Mercury - Quicksilver Black Diamond 3-Blade Aluminum Propeller 14" Diameter x 11" Pitch Right-Hand Rotation 3 Blades Aluminum High-Gloss Black Finish QA2030X. Overview. There's nothing quite like that moment when when your boat lifts cleanly onto plane, the motor hums steady, and everything just feels right? That's what the Quicksilver Black Diamond 3-Blade Aluminum Propeller delivers - a sense of balance between power, control, and smoothness. It is not just about speed or flash; it's about dep