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Mitsubishi
8UEC52LS
The Mitsubishi 8UEC52LS is an 8‑cylinder, low‑speed (142 rpm) two‑stroke crosshead main engine delivering about 11.8 MW, featuring electronic control of fuel injection, exhaust valve and cylinder lubrication.
11840.0 kW
Power
Engine Specifications
8
Cylinders
520 mm
Bore
1700 mm
Stroke
2-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
SFOC (UEC60LSE-Eco-A2)
164-170 g/kWh (IMO Tier II)
BMEP (UEC60LSE)
20.0-21.0 bar @ MCR
Piston speed (UEC60LSE)
8.4 m/s
Dry mass UEC60LSE 8-cyl
447 tons
Dry mass UEC60LSE 5-cyl
300 tons
Bore/Stroke ratio UEC60LSE
4.00
Stroke/Bore UEC68LSE
3.96
Electronically controlled
Fuel injection, exhaust valve, cylinder lubrication (ECL)
power kw
11840
rpm
142
fuel type
HFO/MDO
configuration
L
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Common failures & inspection points
Exhaust valve fouling due to sodium/vanadium deposits (Na2SO4, CaSO4, V2O5) with heavy fuel oil containing high sulphur content (up to 5%); below dew point conden
Turbocharger fouling due to coal and ash particles in exhaust gas during low-load operation, BMEP decline and combustion deterioration
Piston ring leakage and fuel dilution (>2-3%) due to wear on cylinder running surface/piston rings, increased blowby and oil contamination
Cylinder liner wear due to corrosive combustion with sulphurous fuel oil; inspection criterion: wear according to height of sliding surface, max. permissible
Main bearing wear due to oil contamination; weekly inspection for water ingress (<2% permissible) and 3-month analysis for wear metals (Fe, Cu) required
Type-general inspection and maintenance points for this equipment category — not model-specific.
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Equipment Model #123053
· ✓ still in production