Northern Lights — Before Starting
Operation · engine / genset
From a Northern Lights owner's manual covering: L439, L668, M40C, M439, M445, M65C, M668, M99C. Check it applies to your exact model before use.
Applies to: Northern Lights M668
Before you start
- Use protective clothing and open filler cap carefully when engine is warm to prevent burns.
Procedure
- Check water level in expansion tank; should be about 1 3/4 in. (4-5 cm) below filler cap when cold.
- Check crankcase oil level with dipstick; keep between the waffled area and the marks.
- Check fuel tank level and open any fuel valves.
- Propulsion only: check oil level in the reverse gear.
- Close seacock, check and clean strainer, reopen seacock.
- Place battery switch in ON position.
Specs & values
- Coolant level 1 3/4 in. (4-5 cm) below filler cap sealing surface when cold
Full service-parts list: Northern Lights M668 →
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.