Northern Lights M38C3 / M944 — Cooling System Flushing

Maintenance

For the Northern Lights M38C3 / M944, from the Northern Lights operator's manual.

Applies to: Northern Lights M38C3, Northern Lights M944

Procedure

1. Flush cooling system every 2000 hours or every 12 months, whichever comes first.
2. Remove fill cap and open drains on engine block.
3. Pour clean water into engine until water runs clear.
4. Close drains and refill with recommended coolant mixture.
5. Use 50% water / 50% maximum ethylene glycol antifreeze mix.
6. Check hoses and connections and repair leaks.
7. Start engine, run five minutes, shut down, let cool, and check coolant level.
8. Open sea-cock after working on cooling system and starting engine.

Full service-parts list: Northern Lights M38C3 →, Northern Lights M944 →

Source: Northern Lights operator'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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