Northern Lights — SP15 Heat Exchanger
Maintenance
From a Northern Lights operator's manual covering: M20C, M844LW2, M844W2. Check it applies to your exact model before use.
Applies to: Northern Lights M20C, Northern Lights M844LW2, Northern Lights M844W2, Northern Lights 844W2 / 844LW2 engine, Northern Lights 844W2 engine, Northern Lights 844LW2 engine
Procedure
- Clean the heat exchanger core once a year or after 2500 hours of operation.
- Drain the expansion tank and heat exchanger.
- Remove heat exchanger end covers and remove the core.
- Clean the inside of the core tubes using a metal rod; flush, inspect and clean again if necessary.
- Reassemble, fill the cooling system, start the engine and check for leaks.
Tools required
- metal rod Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Northern Lights M20C →, Northern Lights M844LW2 →, Northern Lights M844W2 →
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.