Main Engine 4-Stroke · Main Engines (4-Stroke)
A maritime power generation unit, the Wärtsilä 18W46DF is a dual-fuel engine designed for modern marine applications. This model, part of the W46DF family, features an 18-cylinder inline configuration with a bore and stroke of 460 mm and 580 mm respectively, operating at 500 rpm on both LNG and heavy fuel oil. Known for its reliability, this engine has accumulated over 7.2 million operational hours since 2004, showcasing robust performance in diverse marine environments. Common maintenance concerns include issues with corroded exhaust valves, especially due to poor fuel quality, and potential damage from turbocharger debris. Regular inspections of cylinder liners and piston crowns are advised to prevent costly failures.
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| oil_change | 1000-1500 hours |
|---|---|
| fuel_filter_change | 500-1000 hours |
| air_filter_change | 1000-2000 hours |
| cooling_system_flush | 5000-10000 hours |
| cylinder_liner | 0.5-1.0 mm wear |
|---|---|
| piston_ring | 0.5-1.5 mm wear |
| exhaust_valve | 0.1-0.5 mm clearance |
| fuel_injector | 0.1-0.5 mm nozzle wear |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors typically check for compliance with classification society rules and regulations, including verification of maintenance records, inspection of critical components, and testing of safety systems.
Estimated lifetime: 30000-50000 hours
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