Specifications + Dimensions

20 kW60 Hz, 1800 RPM
120-240V / 83 A,
120V / 166 A
power factor
Std: 1/1.0
(Opt. 3/0.8)
Voltage regulation±1%
(Based on SAE J1995 and ISO 3046.)
TypeVertical inline
4 cylinder diesel
Displacement135 in3
(2.2 ltr)
Bore/Stroke3.30/3.90 in
(84/100 mm)
HP @ RPM32/1800
Approx. fuel use
1800 RPM @ full load21.7 gph
(6.5 lph)
1800 RPM @ half load21.0 gph
(3.9 lph)
Actual fuel consumption will vary depending on operating conditions.
Wet exhaust
2 inch
Dry exhaust
1 1/2 inch
HE raw
water inlet
3/4 inch
(19 mm) OD
KC coolant
inlet / outlet
1 1/4 inch
Keel Cooler6 ft turbo tube/
12 ft plain tube
Fuel inlet5/16 inch
JIC male
Fuel return1/4 inch
JIC male
Approximate dry weight820 lbs
(372 kg)
Length43.2 in
(1098 mm)
Width20.7 in
(526 mm)
Height32.8 in
(833 mm)

Features + Benefits

Four cycle, 4 cylinder, liquid cooled, naturally aspirated overhead valve diesel. Swirl combustion chambers provide fuel efficiency and reduce smoke. Glow plugs for quick cold starting.

Jacket-water cooling system in standard keel cooled or optional heat exchanger configuration. One-piece heat exchanger housing, expansion tank and liquid cooled exhaust manifold. Fewer troublesome hoses and gaskets. Cast iron to resist corrosion and electrolysis. Easily accessible, rubber impeller seawater pump of bronze and stainless steel is gear driven; no pump drive belts to fail. Cast-iron wet exhaust elbow is included.

The self-venting fuel system features an injection pump with 5% mechanical governor for close AC frequency control and pintle injectors with replaceable tips. Stop solenoid acts directly on the fuel rack eliminating speed variances and linkage problems. Mechanical fuel pump with hand primer eliminates electronic pump failures.

The M20CRW3 meets US EPA Tier III emission standards. It features a disposable dry air cleaner and 1-1/2 inch NPT exhaust outlet.

The closed crankcase vent system traps oil vapor and keeps engine room clean. 8.6 qt (8.2 ltr) oil capacity for better lubrication and 200 hour oil change intervals. Oil drain for quick, clean oil changes. Full flow, spin-on oil filter with bypass.

The DC System uses reliable relays instead of an unrepairable printed circuit board. It is powered by a 12 volt starter motor and battery charging alternator with regulator and belt guard. The set is equipped with a standard S-3C remote mount control panel, featuring an hour meter, volt meter, stop-start switch with run light and a preheat switch. Gauges include oil pressure, coolant temperature and DC voltage. The standard panel can expand to six panels up to 110 feet from the set, while the 20 foot (6m) plug-in panel harness lets you mount your panel anywhere onboard. Low oil pressure, high coolant temp and high exhaust temp safety shutdowns standard.

The Northern Lights, direct coupled, four pole, revolving field, four lead re-connectable generator has Class “H” insulation and a pre-lubricated bearing and features a conservative heat rise rating of 95°C/50°C ambient.

© Northern Lights, Inc. 2018