Northern Lights M864 / OM864W — Cooling System Flushing
Maintenance
For the Northern Lights M864 / OM864W, from the Northern Lights operator's manual.
Applies to: Northern Lights M864
Before you start
- Close the sea-cock before working on the engine cooling system; be sure to open the sea-cock after working on it and before starting the engine.
- The cooling water reaches extremely high temperatures; allow the engine to cool before working on the cooling system.
Procedure
- Flush the cooling system every 750 hours or every 12 months, whichever comes first.
- Remove fill cap and open drains on engine block.
- Pour clean water into the engine until water coming from the engine is clear of discoloration.
- Close drains and refill with recommended coolant mixture (50% water / 50% ethylene glycol antifreeze).
- Check hoses and connections and repair any leakage.
- Start the engine and check for leaks; run five minutes, shut down, let cool, and check coolant level.
Specs & values
- 50% water / 50% ethylene glycol antifreeze mix
Full service-parts list: Northern Lights M864 →
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.