Quicksilver - Aluminum Prop Nut Anode Fits Select Mercury Propellers and Outboard Engines 2" Diameter 809662T. Overview. You can tell a lot about a boater by how they take care of their engine. For those who understand that performance isn't just about power but also protection, the Quicksilver Aluminum Prop Nut Anode (Part Number 809662T) is one of those small yet vital parts that keeps everything running right. It's not flashy-but that's the point. You'll never notice it working, and that's ex