D12-MG

The AB Volvo Penta D12-MG is a four-stroke marine main engine. A main engine of this class is installed in the machinery space and provides propulsion power through the vessel's propulsion train, which may include a reduction gear, shaft line, controllable-pitch arrangement or an electrical propulsion system depending on the ship design. Its basic operating cycle uses separate intake, compression, power and exhaust strokes, with fuel, air, lubrication and cooling systems supporting continuous operation under varying marine loads. Compared with neighbouring engine entries, this unit is identified by its exact manufacturer and model designation and by the stated rating where one is given. Typical maintenance emphasis is on combustion condition, lubrication, cooling, valve gear, fuel injection, starting arrangements and the mechanical connection to the propulsion system. For cylinder dimensions, rotational speed, pressures, clearances, temperatures, wear limits and setting values, refer to the manufacturer documentation for the exact figure.