Main Engine 4-Stroke · Main Engines (4-Stroke)
This equipment belongs to the propulsion category. The Mitsubishi Heavy Industries SA-TA model, featuring an EPA engine family of 4MVXM18.6ACA, is a robust and reliable option for marine applications, operating within Category 1 standards from 2004. It delivers 405 kW at 1840 RPM under the general cycle (propulsion engine, fixed-pitch prop) test configuration S6A3-Y1MPTK-3. Common failures include issues related to combustion, lubricating-oil pressure and quality, cooling-system deterioration, valve-train or cylinder-head faults, fuel-system leakage, and bearing, coupling or alignment problems. Spare parts notes emphasize the importance of maintaining a stock of essential components such as fuel-filter and lubricating-oil-filter elements, injector service or replacement components, and valve-train wear parts. Regular service checks should focus on running records, visual inspections, and adherence to planned maintenance schedules to ensure optimal performance.
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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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