Mercury - Quicksilver Q4 Propeller 14.6" Diameter x 21" Pitch Right-Hand Rotation 4 Blades Stainless Steel Polished Finish 8M0103530. Overview. There is a certain kind of satisfaction that comes from feeling your boat respond instantly - that perfect lift, the smooth bite of the water, and the quiet confidence as it powers forward. That is exactly what the Quicksilver Q4 Stainless Steel Propeller (Part Number 8M0103530) delivers. Built for boaters who crave that sharp, controlled acceleration an