Follow a sacrificial anode schedule — not a guess

Anodes protect lower units and trim tabs. Too little zinc and metal erodes; too much can overprotect.

Book professional help More Rust & Corrosion tips

Why this matters

Anodes protect lower units and trim tabs. Too little zinc and metal erodes; too much can overprotect.

No regrets: If an anode looks 'fine' but hasn't been changed in two seasons, it's probably wrong for your slip chemistry.

When DIY is not enough

Rapid anode loss, pitting on props, or trim tab erosion signals bonding or galvanic issues — our 200-hour service includes anode and lower-unit inspection.

DIY steps

Inspect anodes monthly in saltwater service.
Replace when 50% or more is consumed — don't wait for disappearance.
Match anode type to your environment (salt vs. brackish).
Keep spare anodes on board for long trips.

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Common questions

Follow a sacrificial anode schedule — not a guess

Anodes protect lower units and trim tabs. Too little zinc and metal erodes; too much can overprotect. If an anode looks 'fine' but hasn't been changed in two seasons, it's probably wrong for your slip chemistry.

When should I call a professional instead?

Rapid anode loss, pitting on props, or trim tab erosion signals bonding or galvanic issues — our 200-hour service includes anode and lower-unit inspection.