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MAN 9L28/32S

Main Engine 4-Stroke · Main Engines (4-Stroke)

Technical data from manufacturer or class sources · not yet verified by a person
2,970 kWPower
9Cylinders
280 mmBore
320 mmStroke

Marine engineers and crew members rely on robust and reliable engines like the MAN 9L28/32S to ensure the continuous operation of their vessels. This particular model, designed by MAN Energy Solutions, is a medium-speed diesel engine with a power output of 2970 kW. The engine features a 9-cylinder inline configuration, with a bore of 280 mm and a stroke of 320 mm, running at 720 rpm. It is capable of operating on heavy fuel oil (HFO) or marine diesel oil (MDO), and can be configured as a dual-fuel variant with LNG for lower emissions. Common maintenance issues include fouling of charge air coolers, exhaust valve erosion, salt water corrosion, main bearing wear, and fuel nozzle issues, all of which require regular inspection and maintenance to ensure optimal performance.

Specifications

Technical data.from datasheet

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

Swept volume per cylinder19.7 dm³ (19,700 cm³)
Power per cylinder (MCR)210 kW/cyl at 720 rpm
Compression ratio13.9:1
Max combustion pressure130 bar
Piston area per cylinder616 cm²
Mean Effective Pressure (MEP)17.8 bar (at MCR, MDO operation)
Fuel consumption (SFOC, MCR)~232-233 g/kWh (HFO), ~188-190 g/kWh (at 75% load, MDO)
Oil consumption (lube oil)0.6-1.0 g/kWh (L28/32H), 0.4-0.8 g/kWh (V28/32S)
Dry weight (5L28/32H @720rpm)32.6 tonnes
TurbochargingConstant pressure system with intercooling
Emission standard (L28/32H)IMO Tier II, IMO Tier III (L28/32DF)
ConfigurationL
Speed (rpm)720
Fuel TypeHFO/MGO
TechnologyMedium-Speed Common Rail
Displacement l per cyl19.7
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Download datasheet (PDF) (24097 KB)
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