Northern Lights M150A13 / M80A13 — Inspect and Replace Zinc Plugs

Maintenance · Sea water cooling system

For the Northern Lights M150A13 / M80A13, from the Northern Lights owner's manual.

Applies to: Northern Lights M150A13

Procedure

1. Remove zinc rod from each heat exchanger end cap.
2. Inspect condition; replace if deteriorated.
3. Measure length and outer diameter.
4. Replace all zinc plugs if length below 15.9 mm.
5. Replace all zinc plugs if diameter below 4.8 mm.

Full service-parts list: Northern Lights M150A13 →

Source: Northern Lights owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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