"> Japan Engine Corporation UEC52LSE
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Japan Engine Corporation

UEC52LSE

The UEC52LSE is a low‑speed two‑stroke main engine from Japan Engine Corporation, featuring a 520 mm bore and designed for flexible fuel operation on large merchant vessels.

Japan Engine Corporation UEC52LSE
Per Hersteller-Datenblatt
Capacity
HFO/MDO/MGO/VLSFO
Medium

Engine Specifications

520 mm
Bore
2-stroke
Stroke Type

Inspector Detail

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Designation decoded

UEC steht für Unified Engine Company (Mitsubishi/J-ENG), 52 für 520 mm Bohrung, LSE für Long Stroke Enhanced.

Background

The UEC52LSE is a medium 2-stroke engine with 520 mm bore — identical bore as the WinGD X52. Used on Supramax bulk carriers and medium-sized tankers. J-ENG proprietary design.

Calculated metrics

Inspector checklist

Laufzeug & Tribologie
  • Zylinderlaufbuchsen: 520 mm Bohrung.
  • Kolbenringe: UEC-Design.
  • Kreuzkopf-Lager: Standard.
Steuerung & Einspritzung
  • J-ENG-Steuerung.
  • Einspritzventile.
  • Auslassventil.
Brennstoffsystem
  • Düsen. Cat-Fines <10 ppm.
Spülluft & Turbolader
  • Mitsubishi MET-TC.
  • Ladeluftkühler.

Logbook reference values

Parameter Expected Deviation means
Exhaust gas temperature per cylinder 350–408 °C at 75% MCR Spread >20 °C → Einspritzung
Pmax 132–160 bar Zylinderabweichung >5 bar → Diagnose

Common Failure Modes

Cat-Fines-Schaden
Symptoms: rapid wear
Causes: Separator-Fehlfunktion
Preventive: Cat-Fines <10 ppm.
Cold Corrosion
Symptoms: liner wear
Causes: Schwefelkondensation
Preventive: BN-angepasst.

Expert tips

  • 💡 UEC52LSE and WinGD X52 have the same bore (520 mm), but are completely different engines — no parts compatibility.
  • 💡 J-ENG-Service in Europa: Limitiert. Bei Reparaturbedarf außerhalb Asiens: Vorlaufzeit einplanen.

Related components

Turbolader (Mitsubishi MET) Brennstoff-Separator J-ENG Steuerung Kreuzkopf-Lager

Classification & regulatory

IMO Tier II.

Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.

Components & Design

Component data being added…

Technical Data

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Common failures & inspection points

●Exhaust valve burn-through
●Fuel pump wear
●Cylinder liner corrosion
●Piston ring sticking

Service & Maintenance

UE PMS requires regular scavenge inspection, performance trend review and fuel injection equipment checks.

Suppliers & Spare Parts

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Replacement Parts

Maintain exhaust valve parts, fuel pump elements, fuel valve nozzles, piston rings and cylinder cover sealing kits.
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Equipment Model #36785 · discontinued