Northern Lights — Servicing cooling system
Maintenance
From a Northern Lights operator's manual covering: 753, L753, L843, L854, M354-G, M753, M843, M854, M892. Check it applies to your exact model before use.
Applies to: Northern Lights 753, Northern Lights M753, Northern Lights M843, Northern Lights 854A engine, Northern Lights 854B engine
Before you start
- Open filler cap carefully when engine is warm.
Procedure
- Remove expansion tank cap and open drain cock at engine block and exhaust manifold where applicable.
- Shut bottom valve and drain water before working on cooling system.
- Flush cooling system with clean water until free from discoloration and sediment.
- When cold weather expected, fill with 50% anti-freeze and 50% water.
- When temperatures remain above freezing, fill with water and add coolant conditioner.
Specs & values
- Flush and check every 600 hours or 12 months, whichever comes first.
Full service-parts list: Northern Lights 753 →, Northern Lights M753 →, Northern Lights M843 →
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.