Main Engine 4-Stroke · Main Engines (4-Stroke)
The MAN 8L51/60DF is an 8‑cylinder, medium‑speed four‑stroke marine main engine delivering up to 9 336 kW at 514 rpm, capable of running on LNG (dual‑fuel) or conventional HFO/MDO with seamless fuel switching.
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| Oil change | 1000-1500 hours |
|---|---|
| Fuel filter change | 500-1000 hours |
| Air filter change | 1000-2000 hours |
| Cylinder head overhaul | 15000-20000 hours |
| Major overhaul | 30000-40000 hours |
| Cylinder liner diameter | 0.5-1.0 mm overbore |
|---|---|
| Piston ring gap | 0.5-1.5 mm |
| Crankshaft bearing clearance | 0.1-0.5 mm |
| Camshaft bearing clearance | 0.05-0.2 mm |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyor typically checks engine condition, performance, and compliance with regulatory requirements, including emissions and safety standards
Estimated lifetime: 30000-40000 hours
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