8S50ME-C8.5
The Doosan 8S50ME-C8.5 is an 8‑cylinder, inline, low‑speed two‑stroke main engine with electronic MAN‑licensed control, delivering roughly 9 000–10 000 kW at 117 rpm and capable of running on HFO, VLSFO or MGO.
Engine Specifications
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Common issues
- Excessive cylinder liner wear due to incorrect fuel injection timing
- Fuel pump leakage resulting in low-pressure fuel system issues
- Main bearing overheating caused by inadequate lubrication or misaligned bearing shells
Inspection checklist
- Cylinder head and valve condition
- Piston ring and cylinder liner wear
- Fuel injection system and nozzle condition
- Main bearing and crankpin clearance
- Lubrication oil system and filter condition
- Exhaust valve and turbocharger condition
- Crankcase and camshaft condition
- Electronically controlled fuel injection system parameters
Service intervals
| oil_change | 1000-1500 hours |
| fuel_filter_replacement | 500-1000 hours |
| air_filter_replacement | 1000-2000 hours |
| cylinder_liner_overhaul | 15000-20000 hours |
| main_bearing_overhaul | 20000-25000 hours |
Typical wear limits
| cylinder_liner | 0.5-1.0 mm wear limit |
| piston_ring | 0.2-0.5 mm wear limit |
| main_bearing | 0.1-0.2 mm clearance limit |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Cylinder liners
- Piston rings
- Main bearings
- Fuel injection nozzles
- Exhaust valves
- Turbocharger blades
- Crankshaft seals
Safety
- Risk of scalding from hot surfaces and pipes
- Exposure to hazardous fuels and lubricants
- Potential for electrical shock from control systems
Class survey
Class surveyor typically checks for compliance with classification society rules and regulations, including verification of maintenance records, inspection of critical components, and review of safety procedures
Components & Design
Component data being added…
Technical Data
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