Northern Lights — Winterize / Out-of-Service
Maintenance · Engine
From a Northern Lights operator's manual covering: LP445D, LP445T, LP668D, LP668T. Check it applies to your exact model before use.
Applies to: Northern Lights LP445D, Northern Lights LP445T, Northern Lights LP668D, Northern Lights LP668T, John Deere Powertech 4045 engine, John Deere Powertech 6068 engine
Procedure
- Shut off sea cocks before opening drain cocks.
- Drain seawater cooling systems completely.
- Drain seawater supply lines and wet exhaust line.
- Loosen seawater pump cover and drain pump.
- Check freshwater antifreeze mixture; refill water if necessary.
Full service-parts list: Northern Lights LP445D →, Northern Lights LP445T →, Northern Lights LP668D →, Northern Lights LP668T →
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.