Mercury - Quicksilver Q4 Propeller 14.6" Diameter x 19" Pitch Right-Hand Rotation 4 Blades Stainless Steel Polished Finish 8M0103528. Overview. There is a moment every boater lives for - when you hit the throttle, and your boat doesn't just move, it leaps. The bow lifts, the hull steadies, and suddenly, everything feels connected. That is the kind of performance you get from the Quicksilver Q4 Stainless Steel Propeller (Part Number 8M0103528). It's built for boaters who expect more than motion -