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Outboard Anodes

Outboard anodes help protect the lower unit and other submerged metal components from galvanic corrosion. Because outboards use multiple anode locations, choosing the correct part means matching both the model and the mounting position, then confirming the measurements and material choice. This collection brings together outboard anodes across popular brands and applications.

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What do I need to confirm an outboard anode?

Provide the outboard brand and model and use year or serial where possible. Then identify the anode location, trim tab, plate, bracket, or other position. Match shape, thickness, and hole spacing, and confirm fixing type. If you have part numbers from diagrams, use them to validate. Photos of the old anode and the mounting point usually make it easier to confirm quickly when markings are missing.

Should I replace all outboard anodes together?

If multiple anodes are part-worn, replacing them together can help keep protection consistent across the outboard. If you only replace one, the new anode can end up working harder while other anodes are already near the end of life. A practical approach is to replace any anode that is heavily wasted or damaged, then inspect the rest and plan a full set replacement at the next service interval.

Why are my outboard anodes wearing out quickly?

Fast wear can be caused by unsuitable anode material for your environment, missing anodes elsewhere on the outboard, or electrical issues such as stray current in marina conditions. Confirm clean contact surfaces and tight fixings first. Then check that all expected anode locations are fitted. If rapid wear continues, inspect wiring, chargers, and shore power connections for corrosion or faults. Unusual wear is often a sign to investigate the wider setup.

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Outboard anodes, matched by model and mounting point

Anode location is the detail most people miss

Trim tab, plate, and bracket anodes can look similar online, but they are designed for different mounting points. Start by identifying where the anode fits on your outboard, then match the correct shape and fixing style. This reduces wasted time during servicing and helps avoid returns.

Measurements prevent “close enough” mistakes

Hole spacing, thickness, and profile details determine whether an anode sits flush and maintains contact. Measure the old anode or the mounting point, or use a photo beside a ruler. This is especially important on older outboards or units that have been updated over time.

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Fit clean contact surfaces and monitor wear

Remove paint and oxidation where the anode contacts the metal surface and tighten fixings evenly. Inspect after a few trips. Steady wear is normal. Very fast wear can indicate electrical issues or marina conditions, while no wear often points to poor contact or an unsuitable material for your environment.

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