Northern Lights — SP-14 Heat Exchanger
Maintenance
From a Northern Lights owner's manual covering: 844DW3, 844LW3, M20CRW3, M844DW3, M844LW3, M844W3. Check it applies to your exact model before use.
Applies to: Northern Lights M20CRW3, Northern Lights M844DW3, Northern Lights M844LW3, Northern Lights M844W3, Northern Lights 844 (844L for LW models) engine, Northern Lights 844L engine
Procedure
- Clean the heat exchanger core every 24 months, or after 2500 hours, or as needed.
- Drain expansion tank and heat exchanger.
- Remove heat exchanger end covers and remove core.
- Clean the inside of exchanger 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.
Specs & values
- Every 24 months or 2500 hours
Full service-parts list: Northern Lights M20CRW3 →, Northern Lights M844DW3 →, Northern Lights M844LW3 →, Northern Lights M844W3 →
Source: Northern Lights owner'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.