Main Engine 4-Stroke · Main Engines (4-Stroke)
The Wärtsilä 8W20 is an 8‑cylinder, medium‑speed (900–1000 rpm) diesel engine delivering up to 1 600 kW, featuring common‑rail direct injection and turbocharging with intercooling for high specific power and fuel flexibility.
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| item | every 1000-2000 hours for routine maintenance, every 5000-10000 hours for major overhaul |
|---|
| 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 |
| crankshaft_bearing | 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 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
Estimated lifetime: 20000-40000 hours before major overhaul
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