Main Engine 4-Stroke · Main Engines (4-Stroke)
Engineers and operators aboard vessels rely on powerful and reliable engines to keep their operations running smoothly. The Yanmar KYDXN20.4D6C is a 555 kW marine diesel engine designed for propulsion in variable speed applications with fixed-pitch propellers. Manufactured in 2019, this engine falls under EPA engine family KYDXN20.4D6C and IMO engine category 1. It features a 4-stroke compression ignition cycle and a turbocharged direct injection fuel system. The KYDXN20.4D6C boasts six cylinders with a displacement of 3.3000000000000003 liters per cylinder. Its EPA certified performance is tested at 555 kW. Onboard maintenance for this engine typically involves stocking fuel-system service items, lubricating-oil and fuel filters, cooling-system seals, belts, valve-train consumables, injector-related service parts, sensors, and common gaskets or O-rings. Critical spares should be selected based on the specific engine serial number, emissions package, and vessel redundancy.
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What our service work and the manufacturer documentation say about keeping this model running.
Review operating trends for lubricating-oil pressure, coolant temperature, exhaust temperatures, load balance, crankcase condition and abnormal vibration or noise. Inspect filters, coolers, fuel equipment, valve gear, turbocharging equipment, mounts, flexible connections and safety shutdown devices in accordance with the installed configuration. Check for fuel, oil, coolant and exhaust leakage and verify that protective alarms and shutdowns are functional. A surveyor will normally look for evidence of disciplined maintenance, clean machinery spaces, leak control, intact guards and reliable safety functions. Use the engine serial number and manufacturer documentation for all exact wear limits, adjustment values and overhaul criteria.
Useful onboard spares typically include fuel-system service items, lubricating-oil and fuel filters, cooling-system seals, belts where fitted, valve-train consumables, injector-related service parts, sensors and common gaskets or O-rings. Critical spares should be selected against the exact engine serial number, installed emissions package and vessel redundancy; refer to the manufacturer parts documentation before ordering.
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