Main Engine 4-Stroke · Main Engines (4-Stroke)
The MR704 marine engine from vm motori s.p.a. operates on a four-stroke combustion cycle, fueled by a Common Rail system and turbocharged for enhanced performance. This powerful engine boasts a rated power output of 169 kW at 3800 rpm, generating a torque of 480 Nm. Classified under IMO Category 1, the MR704 features a 4-cylinder design with a displacement of 0.69 liters per cylinder. EPA certified under the engine family "BV5XN02.8K6R" for the model years 2011, the engine is specifically designed for propulsion applications and adheres to the E5 Recreational duty cycle. Critical spare parts include fuel-filter and lubricating-oil-filter elements, approved seals and gaskets, injector service or replacement components, valve-train wear parts, and service parts for essential pumps. Comprehensive service notes emphasize regular reviews of running records, visual inspections for leaks and wear, and adherence to a planned-maintenance system.
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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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