5S50ME-C8.5
The Hudong‑Zhonghua 5S50ME-C8.5 is a medium‑speed, electronically controlled 2‑stroke diesel engine (MAN‑licensed ME‑C) with five inline cylinders, designed for main propulsion or high‑power auxiliary use on smaller to mid‑size vessels.
Engine Specifications
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Common issues
- Excessive cylinder liner wear due to poor fuel quality or inadequate maintenance
- Fuel pump leakage or malfunction leading to decreased engine performance
- Scavenge air system issues causing reduced engine efficiency and potential damage to components
- Main bearing wear or damage resulting from misalignment or inadequate lubrication
- Turbocharger fouling or failure due to poor maintenance or dirty air filters
- Exhaust valve leakage or damage from overheating or corrosion
- Piston ring wear or breakage leading to decreased engine compression and performance
Inspection checklist
- Cylinder head and valve condition
- Piston and ring condition
- Cylinder liner wear and condition
- Main bearing and crankpin condition
- Fuel pump and injector condition
- Scavenge air system filters and components
- Turbocharger condition and performance
- Exhaust system condition and leaks
- Lubrication system condition and oil quality
Service intervals
| oil_change | 1000-1500 hours |
| fuel_filter_change | 500-1000 hours |
| air_filter_change | 1000-2000 hours |
| cylinder_liner_overhaul | 15000-20000 hours |
| major_overhaul | 30000-40000 hours |
Typical wear limits
| cylinder_liner | 0.5-1.0 mm wear limit |
| piston_ring | 0.5-1.0 mm wear limit |
| main_bearing | 0.1-0.5 mm wear limit |
| crankshaft | 0.1-0.5 mm wear 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 pumps and injectors
- Turbocharger components
- Exhaust valves
- Crankshaft seals
Safety
- High-pressure fuel system leaks or ruptures
- Scavenge air system explosions or fires
- Exhaust system leaks or overheating
- Crankcase explosions or fires due to inadequate ventilation
Class survey
The class surveyor will typically check the engine's condition, performance, and maintenance records to ensure compliance with regulatory requirements and classification society rules, including verification of service intervals, critical spare parts, and safety concerns
Components & Design
Component data being added…
Technical Data
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