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MAN Energy Solutions

12V27/38

The MAN 12V27/38 is a medium‑speed, V‑type 12‑cylinder four‑stroke propulsion engine delivering up to 4 080 kW at 800 rpm, designed for fuel flexibility (HFO, MDO/MGO) and IMO Tier II compliance with optional SCR for Tier III.

MAN Energy Solutions 12V27/38
4080.0 kW
Power

Engine Specifications

12
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 4080
rpm 800
fuel type HFO/MDO
configuration V

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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 #123278 · ✓ still in production

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Westin Marine Technology (Shanghai · ChinaGOLDEN OCEAN MARINE SERVICES · EgyptGulf Turbo Solutions FZC · SingaporeLubrafil BV · NetherlandsMancraft AS · NorwayMarine Technics Baltia OÜ · Estonia +7 more
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