Mercury - Power Trim Anode Corrosion Protection Aluminum 8M0179780. Overview. When you spend your weekends on the water, you learn quickly which parts you can trust-and which ones you absolutely must. An anode is one of those quiet protectors you don't think much about until you need it. The Mercury Marine part 8M0179780 Power Trim Anode is built for boaters who understand the value of keeping their engine's most critical components safe from corrosion. It's a small piece with a big job, and kno