Main Engine 4-Stroke · Main Engines (4-Stroke)
Operated on a 4-stroke combustion cycle and designed for propulsion applications, the Wärtsilä DWNFN218.34A model delivers consistent performance with rated power of 2610 kW at 720 rpm. This engine supports dual-fuel operation, combining diesel and LNG fuel systems, and features turbocharging to enhance efficiency. Common failures include issues related to combustion, lubricating oil quality, cooling system deterioration, valve train faults, fuel system problems, and bearing or alignment wear. Maintenance should focus on monitoring exhaust temperature spread, lubricating oil pressure, and cooling temperatures, while also inspecting for leaks and examining critical components like filters, pumps, and injectors. Regular reviews of running records are essential to detect any developing issues that could affect the engine's reliability.
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What our service work and the manufacturer documentation say about keeping this model running.
Review running records for exhaust-temperature spread, lubricating-oil pressure, cooling temperatures, starting behaviour, vibration and abnormal consumption trends. Inspect for fuel, lubricating-oil, cooling-water and exhaust leaks and check the condition of flexible connections, mounts, foundations and coupling or gearbox interfaces. Examine filters, coolers, pumps, valve gear, injectors and accessible combustion components in accordance with the planned-maintenance system. Check crankcase condition, oil analysis and any available bearing or vibration monitoring for developing wear. A surveyor should verify alarms, shutdowns, overspeed protection, emergency stopping arrangements and guarding of moving or hot parts as applicable to the installation. For cylinder dimensions, rotational speed, pressures, clearances, temperatures, wear limits and setting values, refer to the manufacturer documentation for the exact figure.
Carry fuel-filter and lubricating-oil-filter elements, approved seals and gaskets, injector service or replacement components, valve-train wear parts appropriate to the engine, and service parts for essential pumps. Critical installations should also hold selected sensors, relays or control modules, starting-system components, belts or flexible elements where fitted, and manufacturer-recommended bearing or cylinder-head service items. The exact onboard spare scale should follow the manufacturer, class requirements, engine redundancy and the vessel's trading pattern.
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