Northern Lights — Shutdowns and Alarms Response
Testing & diagnosis · Engine safety system
From a Northern Lights owner's manual covering: M20C, M844, M844L, OM844K2, SP5, SP6. Check it applies to your exact model before use.
Applies to: Northern Lights M20C, Northern Lights M844, Northern Lights M844L
Before you start
- Do not remove the water fill cap of an overheated engine. Escaping high temperature steam can cause severe burns.
Procedure
- Check the temperature gauge; if above 205°F (96°C), shut off the engine immediately.
- Use the Trouble Shooting Guide to isolate the cause of the overheat.
- Make repairs. Restart the Marine set after the temperature gauge registers below 200°F (94°C).
- Watch the temperature gauge regularly and turn off the unit if temperature rises above 205°F (96°C).
- If shutdown is activated and temperature is normal, check the engine crankcase oil level.
- If oil level is low, fill with recommended lubricating oil and restart; watch the oil pressure gauge.
- If the oil level is normal, DO NOT restart the engine. Call your dealer for assistance.
Specs & values
- Shutdown above 205°F (96°C)
- Normal oil pressure 20-60 PSI
Full service-parts list: Northern Lights M20C →, Northern Lights M844 →, Northern Lights M844L →
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.