M50T13L: 50kW

Engine Block

  • US EPA Tier III compliant.
  • Four cylinder, four cycle, in-line, 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.

Fuel System

  • 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.

Lubrication System

  • 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.

Air System

  • Dry air filter silences intake noise.
  • Turbocharger with jacket water cooled turbine housing for safety.

Cooling System

  • 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.

ESP and DC Electrical System

  • 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.

AC Generator

  • 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.
  • Engines and generators are torsionally matched for long life.
  • Automatic voltage regulator; ±0.5% regulation over the entire range from no load to full load.
  • Configured for 0% isochronous droop with integral electronic governor control supplied by ECU.

Special Equipment

  • PMG option for 300% short circuit protection.
  • 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.


M50T13L Specifications
60 Hz / 1800 rpm:50 kW
Cylinders:4 inline
Bore:4.19 in (106 mm)
Stroke:5 in (127 mm)
Displacement:276 cid (4.5 ltr)
Fuel Systems:HPCR
Length:75 in (1905 mm)
Width:38 in (965 mm)
Height:39.2 in (997 mm)
Weight:2315 lbs (1050 kg)
Information, specifications, materials and dimensions subject to change without notice.
US EPA Tier 3 Marine Certified Units are available globally.