Northern Lights M753 / M753W2 — Cooling System Flushing

Maintenance

For the Northern Lights M753 / M753W2, from the Northern Lights operator's manual.

Applies to: Northern Lights M753, Northern Lights M753W2

Procedure

1. Flush cooling system every 2500 hours or every 12 months, whichever comes first.
2. Remove expansion tank cap and drain engine block.
3. Open block drain cock; remove plug in lower left side of heat exchanger tank.
4. Pour clean water into expansion tank until water from drains is free of discoloration and sediment.
5. Let water drain completely; close drains and refill with recommended mixture.
6. Check hoses and connections and repair leakage.

Full service-parts list: Northern Lights M753 →, Northern Lights M753W2 →

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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