Mercury - Aluminum Trim Assembly Anode V10 Verado Series Aluminum 8M0204939. Overview. When you spend your weekends on the water, you learn fast which parts you can trust and which ones leave you worrying. Corrosion is one of those things you never see coming until it's already done its damage, and once it starts, it spreads quietly. That's why having the right anode in place matters so much. With the Mercury Marine part 8M0204939, you get the kind of protection that feels steady and reliable -