Northern Lights 984K / M984 — Winterizing / out-of-service
Maintenance · complete unit
For the Northern Lights 984K / M984, from the Northern Lights operator's manual.
Applies to: Northern Lights M984, Northern Lights 984K engine
Procedure
- Close the sea-cock before opening drain cocks.
- Change the crankcase oil and filter.
- Drain fresh water and seawater cooling systems completely; flush fresh water systems and refill with the proper antifreeze mixture.
- Drain the water supply lines and wet exhaust line.
- Loosen the seawater pump cover and drain the pump.
- Loosen the alternator belt.
- Disconnect and clean the battery; remove to warm storage if possible.
- Clean the outside of the unit, paint scratched or chipped surfaces and apply corrosion preventative to exposed metal.
Full service-parts list: Northern Lights M984 →
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.