Specifications + Dimensions

AC Output
25 Kw60 Hz @ 1800 rpm, 1 Ph, 1.0 PF,
120/240 V/104.1 A, 120 V/208.3 A
20 Kw50 Hz @ 1500 rpm, 1 Ph, 1.0 PF,
220 V/90.9 A
Reconnectable toThree Phase with 0.8 PF
Voltage Regulation+/- 1%
Cylinders:4 inline
(Based on SAE J1995 and ISO 3046)
Engine Data
TypeVertical inline
4 cylinder diesel
Displacement:152 in3
(2.5 ltr)
Bore/Stroke:3.40/4.20 in
(86/107 mm)
HP @ RPM39/1800
Approximate fuel use:
1800 RPM @ full load2.23 gph
(8.40 lph)
1800 RPM @ half load1.17 gph
(4.40 lph)
1500 RPM @ full load1.78 gph
(6.73 lph)
1500 RPM @ half load0.93 gph
(3.52 lph)
(Actual fuel consumption will vary depending on operating conditions.)
Installation Data
Wet exhaust elbow3 inch
(76 mm) OD
Raw water inlet3/4 in
(19 mm) OD
Fuel inlet5/16 - 37T JIC
Fuel return1/4 - 37T JIC


Information and dimensions are subject to change without notice.

Consult factory for classification society.

Features + Benefits

Four cycle, 4 cylinder, liquid cooled, naturally aspirated, overhead valve diesel with glow plugs for quick starting. The forged carbon-steel crankshaft is stronger than cast iron whole the cross fl ow head makes for more efficient breathing. Helical cut gear train reduces noise.

Standard heat exchanger cooling with optional keel cooling. Copper-nickel, tube-type heat exchanger has removable end caps for easy cleaning. Electrolysis protection via zinc anode. The bronze and stainless steel seawater pump with rubber impeller is gear driven, eliminating a potential failure point.

The self-venting fuel system features an inline injection pump with 3-5% mechanical governor for close AC frequency control. The fuel lift pump is mechanical with a hand primer, eliminating electronic pump failures.

The M864W3 meets US EPA Tier III emission standards. Its cast aluminum intake manifold with Sound Maze system reduces noise, and its washable air cleaner makes routine maintenance simple. The wet exhaust elbow is stainless steel.

The closed crankcase vent system traps oil vapor and keeps engine room clean. 6.9 qt (6.5 ltr) oil capacity for better lubrication and 200 hour oil change intervals. Oil drain hose with valve plumbed to base pan as standard.

The DC System features a 12 volt starter motor and battery charging alternator with belt guard. The set is equipped with a standard remote mount control panel, featuring an hour meter, stop-start switch, engine gauges, a preheat switch, and includes a 20 foot (6m) harness. The standard panel can be expanded to six panels, up to 110 feet from the set. Gauges include oil pressure, coolant temperture and DC Voltage. Low oil pressure, high coolant temperature and high exhaust temperature safety shutdowns standard.

The Northern Lights, direct coupled, four pole, twelve lead reconnectable generator has Class “H” insulation, a pre-lubricated bearing and features a conservative heat rise rating of 95°C/50°C ambient. Our automatic voltage regulator gives you ±1% voltage regulation. The AVR protected by a dedicated circuit breaker.

© Northern Lights, Inc. 2018