Mercury - Quicksilver Black Diamond Propeller 16" Diameter x 14" Pitch Right-Hand 3-Blade Aluminum Phantom Black Finish QA2006X. Overview. If you've spent any time behind the wheel of a boat, you know the propeller makes all the difference. The Quicksilver Black Diamond 3-Blade Aluminum Propeller is one of those dependable pieces you come to trust - not flashy, not finicky, just quietly capable. It's the kind of prop that gets you on plane fast, holds steady through turns, and shrugs off the scr