Main Engine 4-Stroke · Main Engines (4-Stroke)
The MAN 18L51/60DF is an 18‑cylinder, L‑configuration, four‑stroke marine main engine delivering up to 21 MW (≈28 200 hp) at 514 rpm, capable of running on LNG with a diesel pilot or conventional HFO/MDO.
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| oil_change | 1000-1500 hours |
|---|---|
| fuel_filter_replacement | 500-1000 hours |
| air_filter_replacement | 1000-2000 hours |
| cylinder_liner_overhaul | 12000-18000 hours |
| piston_and_ring_replacement | 18000-25000 hours |
| cylinder_liner | 0.5-1.0 mm wear limit |
|---|---|
| piston_ring | 0.5-1.0 mm wear limit |
| exhaust_valve | 0.5-1.0 mm wear limit |
| turbocharger_blades | 0.1-0.5 mm wear limit |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically check the engine's condition, maintenance records, and compliance with regulatory requirements, including those related to emissions, safety, and environmental protection.
Estimated lifetime: 30000-40000 hours
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