Northern Lights — Change Engine Oil
Maintenance · crankcase
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
- Never put additives or flushing oil in crankcase.
Procedure
- Change engine oil after first 50 hours, first 100 hours, then every 200 hours.
- Propulsion with drain pump: remove dipstick, unscrew dipstick tube, insert hand pump, drain by pumping.
- Generator sets: remove plug from base frame outlet, screw in drain hose, open oil pan valve.
- Drain oil into suitable container, close valve, remove hose and replace plug.
- Refill engine with recommended oil.
- Change oil at any seasonal change in temperature.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- L438D 9 qt (8.5 liters)
- L439T 14 qt (13.2 liters)
- 445 Series 14 qt (13.2 liters)
- 668 Series 18 qt (17 liters)
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.