Specifications + Dimensions

60 Hz / 1800 rpm:
50 Hz / 1500 rpm:

50 kW

50 kW
Voltage regulation:1%
Volts/amps @ 60 Hz:
Volts/amps @ 50 Hz:


Frequency droop control:Isochronous 0%
Phase and power factor:Three phase 0.8 power factor std.
Opt.: Single phase -1.0 power factor
Generator full load temperature rise90°C temperature rise at 50°C ambient
Inline cylinders
operating cycle:
I-4 / Turbocharged/ 4
Displacement -
cid (liter):
276 (4.5)
Bore/stroke -
inches (mm):
4.19/5 (106/127)
Fuel injection
pump type and
Electronic (HPCR)
(Keel cooling standard, heat exchanger optional)
Heat rejection to jacket water -1800 rpm BTU min4,548
Freshwater pump capacity - 1800 rpm/gpm (lpm)30.9
KC approximate cooling capacity - gal (ltr)4.5
HE approximate cooling capacity - gal (ltr)3.7
Seawater pump capacity - 1800 rpm/gpm(lpm)24
Max seawater pump suction head lift - ft (m)10
Sea water pump inlet hose ID - in (mm)1.25
Min. seawater inlet/discharge thru-hull - in (mm)1.25
(12V standard, 24V optional)
DC starting voltage - standard (optional)12 (24)
Min battery capacity - amp hr/12V CCA (24V CCA)200/1100 (750)
Starter rolling amps @ 0°C - 12VDC (24VDC)920 (600)
12 Volt battery cable size up to 10 ft (3m)2/0
Air consumption - 1800 rpm/cfm (m3/m)215
Approx heat radiated to air - 1800 rpm/BTU/min596
Generator cooling air flow 1&3Ø - 1800 rpm cfm700
Exhaust gas volume - 1800 rpm/cfm (m3/m)521
Exhaust gas temp - 1800 rpm/F°(C°)846
Max. exhaust back pressure - inch H2O (mm H2O)30
Wet exhaust elbow OD- in (mm)4
Dry exhaust elbow in (mm)4
Fuel injection pump type and controlHigh Pressure Common Rail
Min suction -
in (mm)
Min return line -
in (mm)
Max fuel transfer
pump suction lift -
ft (m)
Max fuel flow to
transfer pump at
1800 rpm - gph
Specific fuel
max load
1800 rpm -
Approx. fuel rate
at 1800 RPM
full load -
gph (lph)2
Fuel supply and
return- max pressure
PSI. Height - ft (m)
Fuel supply and
return. Height -
ft (m)
Continuous (with separate expansion tank)30o
Intermittent (2 minutes)45o
- Low Profile
Length -
inches (mm)
Width -
inches (mm)
Height -
inches (mm)
Weight -
pounds (kilograms)
Dimensions and Weight - w/optional enclosure
Length -
inches (mm)
Width -
inches (mm)
Height -
inches (mm)
Weight -
pounds (kilograms)


  1. Prime kW ratings for 3Ø at 0.8 power factor. Consult factory for deration factors.
  2. Based on prime kW rating at 1800 and 1500 RPM. Fuel rate may vary depending on operating conditions.

Dimensions are subject to change without notice, they are not intended for installations.

Contact a factory representative for the current installation data.

Features + Benefits

  • US EPA Tier III compliant and IMO Tier II
  • Four cylinder, four cycle, inline, liquid cooled, overhead valve, marine diesels based on heavy-duty industrial engine blocks.
  • Balanced, forged crankshaft with induction hardened journals and rolled fillets for long life.
  • Replaceable, wet cylinder liners for long life and low rebuild costs.
  • Bimetallic valves with chrome stems and rotators.
  • Replaceable valve seats and guides.
  • Three ring aluminum alloy pistons with Ni-Resist insert for the top ring. Keystone piston ring reduces carbon buildup under light loads.
  • A single poly-vee drive belt powers the alternator and jacket-water pump.
  • High pressure common rail fuel injection for smooth, clean delivery.
  • Direct fuel injection system.
  • Ring clamp fuel filters with air bleed and drain.
  • Diaphragm-type, mechanical fuel transfer pump with manual priming lever.
  • Positive displacement gear-type oil pump.
  • Full flow, spin-on oil filter.
  • Oil spray cooling reduces piston crown temperature.
  • Jacket-water, plate-type, full flow oil cooler reduces heat and prevents lube oil breakdown.
  • Large capacity oil pan.
  • A closed loop crankcase vent traps oil vapor to keep the engine room clean.
  • Dry air filter silences intake noise.
  • Turbocharger with jacket water cooled turbine housing for safety.
  • Heat exchanger with keel cooled option.
  • Gear driven sea water pump with self-priming flexible impeller. Bronze with stainless steel shaft.
  • Cast iron expansion tank.
  • Two thermostats for quick warm-ups and safety.
  • Cast-iron exhaust manifold for reliable temperature control.
  • Negative ground, 12 volt DC system has circuit breaker, starter motor and alternator with regulator.
  • Low oil pressure and high coolant temperature safety shutdowns.
  • Optional control panels help you specify the amount and type of information required. Comprehensive list of optional alarms and safety shutdowns.
  • Optional DC logic system for simplified maintenance.
  • Optional pre-wired engine, panel with terminal strips.
  • Direct coupled, single bearing, 12 lead, reconnectable AC generator. Maintenance free brushless design.
  • All NL generators meet or exceed class society standards with Class “H” insulation, accessible diodes, oversized ball bearings, marine grade shafts and conservative 90°/50° heat rise ratings.
  • PMG for 300% short circuit protection.
  • Engines and generators are torsionally matched for long life.
  • Automatic voltage regulator; ±1% regulation over the entire range from no load to full load.
  • Configured for 0% isochronous droop with integral electronic governor control supplied by ECU.
  • Welded steel base frame.
  • Sparkling white IMRON® polyurethane paint.
  • Operator’s and parts manuals.
  • Optional sound enclosure for industry best sound and vibration attenuation in a compact design.
© Northern Lights, Inc. 2018