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Northern Lights M944W Engine

Name: Northern Lights M944W Engine
Brand: Northern Lights

The Northern Lights M944W is a 12.5 L 6-cylinder turbocharged engine rated at 1500 rpm, producing up to 200 kW. It powers generator sets from Northern Lights, including the M944. It holds 10 L (2.6 gal) of oil and 10 L (2.6 gal) of coolant.

Also known as: Northern Lights M944W

12.5 L

Displacement

Cylinders

1500 rpm

Rated speed

200 kW

Gross power

On this pageSpecs Generator sets Maintenance FAQ

Engine specifications

Oil capacity	10.0 L
Coolant capacity	10.0 L
Displacement	12.5 L
Cylinders	6
Aspiration	Turbocharged
Rated speed	1500 rpm
Gross power	200 kW

Generator sets powered by this engine

Northern Lights M944

How to read your Northern Lights engine serial & model number →

Common problems

Temperature gauge above 205° F (96° C)
Fix: Shut off the engine immediately. Use the Trouble Shooting Guide on page 25 to isolate the cause of the overheat. Allow the engine to cool and then remove the cap slowly using protective clothing. Make repairs and restart after the temperature gauge registers below 200° F (94° C). Watch the temperature gauge regularly and turn off the unit if the temperature rises above 205° F (96° C). Repeat troubleshooting.
Engine oil consumption greater during break-in
Fix: Oil consumption is greater during break-in as piston rings take time to seat. Break-In Oil Changes: Change engine oil and filter at 50 hours. Change oil and filter again at 100 hours (consult Lubricants section for oil recommendation).
Engine does not start after 3 consecutive 20-second cranks
Fix: Remove the impeller from the seawater pump. This will prevent the muffler from ﬁ lling with water and backﬁ lling the exhaust line and engine. Once the engine starts, shut if off immediately and reinstall the impeller. Restart and check the exhaust overboard outlet for gushes of water.

Compiled from service & troubleshooting documentation across every generator set that uses the Northern Lights M944W.

Maintenance schedule

Item	Spec	Capacity	Part #	Interval
Air filter	Air cleaner		24-01201	250 hr	Amazon $50.34 eBay $44.99
Fuel filter	50/50 ethylene-glycol heavy-duty diesel engine coolant		24-51201	2000 hr	Amazon eBay $33.57
Oil filter	Secondary fuel filter		24-51201	250 hr	Amazon eBay $33.57
Battery	sealed batteries		—	500 hr
Belt	alternator drive belt		—	500 hr
Coolant	50/50 ethylene-glycol heavy-duty diesel engine coolant	3.0 gal.	—	2000 hr
Oil	50/50 ethylene-glycol heavy-duty diesel engine coolant	3.0 gal.	—	2000 hr
Spark plug	spark plugs		—	500 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Common questions

What is the oil capacity of the Northern Lights M944W?

The Northern Lights M944W engine has an oil capacity of 10.0 liters.

What is the displacement of the Northern Lights M944W?

The Northern Lights M944W has a displacement of 12.5 liters with 6 cylinders.

Which generators use the Northern Lights M944W engine?

The Northern Lights M944W powers 1 generator set(s), including Northern Lights M944.

How often should you change the oil in the Northern Lights M944W?

The Northern Lights M944W oil change interval is every 2000 hours.

What is a common problem with the Northern Lights M944W engine?

A commonly reported issue on generators using the Northern Lights M944W is: Temperature gauge above 205° F (96° C). Fix: Shut off the engine immediately. Use the Trouble Shooting Guide on page 25 to isolate the cause of the overheat. Allow the engine to cool and then remove the cap slowly using protective clothing. Make repairs and restart after the temperature gauge registers below 200° F (94° C). Watch the temperature gauge regularly and turn off the unit if the temperature rises above 205° F (96° C). Repeat troubleshooting..