Main Engine 2-Stroke · Main Engines (2-Stroke)
The UEC52LSH‑Eco is a low‑speed two‑stroke main engine from Japan Engine Corporation, distinguished by its 520 mm bore and an Eco‑tuned combustion system that delivers higher fuel efficiency while meeting IMO Tier II/III emissions standards.
What our service work and the manufacturer documentation say about keeping this model running.
Use J-ENG PMS. Cylinder condition, drain-oil analysis and slow-steaming performance trends should guide overhaul planning.
UEC steht für Unified Engine Company (J-ENG), 52 für 520 mm Bohrung, LSH für Long Stroke H-type (neueste Generation), Eco für Effizienz-Optimierung.
Der UEC52LSH-Eco ist die neueste Generation des UEC 520-mm-Motors für mittelgroße Handelsschiffe. LSH = vollständig elektronische Steuerung. Eco = SFOC-optimiert. Nachfolger der UEC52LSE-Serie.
| Parameter | Expected | Deviation means |
|---|---|---|
| Abgastemperatur nach Zylinder | 348–405 °C bei 75% MCR | Spread >20 °C → Einspritzung |
| Pmax | 133–162 bar | Zylinderabweichung >5 bar → Diagnose |
| SFOC | 158–168 g/kWh bei 75% MCR | >5% → Optimierung |
Symptoms: Liner-Verschleiß
Causes: Schwefelkondensation
Preventive: BN-angepasst.
Symptoms: rascher Verschleiß
Causes: Separator-Fehlfunktion
Preventive: Cat-Fines <10 ppm.
IMO Tier II/III. EEDI Phase 2/3.
Reference content for inspector orientation. Always verify against manufacturer's manual, latest service letters and class society requirements.
Keep exhaust valves, piston ring sets, fuel valve parts, fuel pump components, cylinder cover seals and control system spares.
Free of charge — send us your request for Japan Engine Corporation equipment. Our team checks it and replies by e-mail.
Other models of the same equipment type, Japan Engine Corporation first.
Tell us what you need for this Japan Engine Corporation UEC52LSH-Eco — a part, a service call, a second opinion. Are you Japan Engine Corporation? Claim this brand page.
Service engineer? Write the day report for this UEC52LSH-Eco in OceanSphere Work — photos, hours and parts, as a PDF for the owner. Try it free for 14 days →
Yes. Specifications, documents and service notes for this model are readable without an account. An account adds saved searches and requests, nothing is taken away.
Yes. Tell us the manufacturer, the model and what you need — a person reads every request and replies by e-mail.
Send us the nameplate or the correct value. We check it against the manufacturer datasheet or class-society record and update the page.