⚓ Working on this equipment?
Ask the AI troubleshooter, log your hours on board and turn them into invoice-ready service reports — for this exact model.
Start free — 14 days →
No credit card required
🔧 91 verified suppliers & service companies for Mitsubishi in the Maritime Network
Find suppliers →
Mitsubishi
7UEC33LSII
The Mitsubishi 7UEC33LSII is a 7‑cylinder, 2‑stroke crosshead marine diesel engine delivering up to 3710 kW at 215 rpm, designed for high‑power, medium‑speed applications with built‑in exhaust turbocharging.
3710.0 kW
Power
Engine Specifications
7
Cylinders
330 mm
Bore
1050 mm
Stroke
2-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Bohrung UEC33LSII
330 mm
Hub UEC33LSII
1050 mm
Hub/Bohr-Verhältnis UEC33LSII
3,18
Bohrung UEC37LSII
370 mm
Hub UEC37LSII
1290 mm
Leistung UEC33LSII (6-Zyl.)
1985–3400 kW @ 215/157 min⁻¹ (verifiziert)
SFOC UEC33LSII
179–183 g/kWh (IMO Tier II, Vollast)
Trockengewicht UEC33LSII
52–78 t (5–8 Zyl.)
Trockengewicht UEC37LSII
83–124 t (configuration not verifiable)
Betriebsmodus
Zweitakt-Kreuzkopfmotor, Gleichstromspülung, Abgasturbolader
Steuerung LSII
Nockenwelle (mechanisch betätigt)
Steuerung Eco-Variante
Elektronisch (Solenoidventile, keine Nockenwelle)
Brennstoff
Schweröl (Heavy Fuel Oil)
IMO-Norm
Tier II; Tier III-konform (mit LPSCR)
power kw
3710
rpm
215
fuel type
HFO/MDO
configuration
L
🤖 Ask about this model
One free question — answered like a marine engineer. No account needed.
Common failures & inspection points
Cold corrosion on cylinder liners due to sulfuric acid condensation at part load — typical for two-stroke diesels; sulfur dioxide from fuel by
Turbocharger wear due to saltwater corrosion — pitting on turbine casing due to seawater feed in exhaust line, pressure drop due to gap enlargement
Piston/cylinder liner wear due to scuffing at insufficient hydrodynamic oil film or poor scavenge air quality — abrasive wear initiat
Black exhaust at part load (turbo-lag phenomenon) — scavenge pressure increases only when turbocharger accelerates; too much fuel → incomplete combustion, r
Zylinderkopf-Wasserdichtung/Kühlung — Risse/undichte Kopfdichtungen ermöglichen Coolant-Eintrag in Kurbelgehäuse (Milchig-braune Ölverfärbung), Korrosion; Restr
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
Direct links to manufacturer, datasheet, spare-parts portal and dealers — request access below.
📄 Request sourcing links & documents🛠 Manage this equipment in your fleet
Cases, daily reports, timesheets and AI troubleshooting in the OceanSphere Marine app — free for 14 days.
Start free trial →🔎 Suppliers & service for this equipment
Find manufacturers, repair shops and spare-part dealers in the Maritime Network — our global company directory.
Maritime Network →Working on this unit?
Log hours, photos and findings into an invoice-ready service report — OceanSphere Marine, 14-day free trial.
Need a service partner for Mitsubishi?
114,000+ shipyards, suppliers and service companies in the Maritime Network directory.
Equipment Model #123044
· ✓ still in production