Main Engine 4-Stroke · Main Engines (4-Stroke)
The MAN 9LL27/38 engine operates on the principle of four-stroke diesel combustion, drawing power from the controlled explosion of fuel within its cylinders. Manufactured by MAN Energy Solutions, this engine boasts a robust L-configuration with nine cylinders, each measuring 270 mm in bore and 380 mm in stroke. This results in a swept volume of 21.76 dm³ per cylinder and an overall displacement of 196.2 L for the nine-cylinder configuration. The engine's rated power output reaches 3060 kW at 800 rpm, delivering impressive performance across various marine applications. Fueling versatility is a key characteristic, with the 9LL27/38 capable of operating on Heavy Fuel Oil (HFO), Marine Diesel Oil (MDO), and Marine Gas Oil (MGO). Additionally, dual-fuel DF versions are available for operation with methanol.
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
| oil_change | every 1000-1500 hours |
|---|---|
| fuel_filter_change | every 250-500 hours |
| air_filter_change | every 500-1000 hours |
| cylinder_liner_overhaul | every 15000-20000 hours |
| cylinder_liner_wear | 0.5-1.0 mm |
|---|---|
| piston_ring_wear | 0.5-1.5 mm |
| valve_seat_wear | 0.1-0.5 mm |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
The class surveyor will typically check the engine's condition, performance, and maintenance records to ensure compliance with regulatory requirements and class rules. Specific attention will be paid to the engine's fuel system, cooling system, and lubricating system, as well as the condition of critical components such as cylinder liners, piston rings, and valves.
Estimated lifetime: 30000-40000 hours
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