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MAN Energy Solutions

5L27/38

MAN Energy Solutions L 27/38 (MAN Diesel & Turbo) — Viertakt-Marinediesel, Bohrung 270 x Hub 380 mm, 800 (main operating speed), also 720 rpm available rpm, 2040-3285 kW (HFO); 2100-3690 kW (MDO/MGO). Brennstoff: Heavy Fuel Oil (HFO), Marine Diesel Oil (MDO), Marine Gas Oil (MGO); dual-fuel DF versions available for methanol. Status: Production ended; Legacy/In-service engines worldwide. Limited new deliveries possible from MAN Energy Solutions. Successor: L27/38 Mk2.. Verifiziert, Datenblatt verlinkt.

1700.0 kW
Power

Engine Specifications

5
Cylinders
270 mm
Bore
380 mm
Stroke
4-stroke
Stroke Type

Components & Design

Component data being added…

Technical Data

Displacement (6-cyl) 130.8 L
Displacement (9-cyl) 196.2 L
Compression Ratio 15.9
Max Combustion Pressure 200 bar
Mean Effective Pressure (MEP) 23.5 bar
Power per Cylinder 340 kW @ 800 rpm
SFOC @ 100% MCR (HFO) 188 g/kWh
SFOC @ 85% MCR (HFO) 185 g/kWh
SFOC (MDO/MGO) @ 100% MCR 191 g/kWh
SFOC (MDO/MGO) @ 85% MCR 186 g/kWh
Dry Mass 6L27/38 29.0 metric tons
Dry Mass 9L27/38 39.5 metric tons
Length 6L27/38 5070 mm
Length 9L27/38 6405 mm
Engine Width 2035 mm
Turbocharger System High-efficiency MAN TCR constant-pressure
Emission Standards IMO Tier II, Tier III (with SCR)
Swept Volume per Cylinder 21.76 dm³
power kw 1700
rpm 800
fuel type HFO/MDO
configuration L

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Common failures & inspection points

Fuel oil contamination (soot formation, increased oil viscosity). Catalytic (cat) fines from degraded fuel oil cause abrasive wear of bearing surfaces and cylin
Fuel injector opening pressure drop (up to 50 bar after few operating hours in new injectors) and broken injector springs detected during 2000-hour inspections.
Piston crown thermal fatigue cracking due to high combustion temperatures and thermal/mechanical stress. Cracks typically radiate from crown center.
Cylinder liner wear near top dead center (TDC) due to high temperature, low oil viscosity, and thin oil film causing asperity contacts between piston ring and l
Crankshaft and main bearing wear/failure caused by inadequate lubrication, incorrect bearing clearance, or poor oil circulation. Connecting rod bearing failure

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #123272 · ✓ still in production