The most rational viscosity before jets 2-2,5 VU, in which the terms of atomization of heavy fuel oil are approximately the same as when operating on distillate diesel fuel. Fuel systems of diesel engines operating on heavy fuel, usually provide two versions of the main engine: start and operate on heavy fuel, start on diesel fuel and switched to heavy fuel. Start malooborotnyh diesel can be produced on srednevyazkom Fuel type diesel fuel or diesel, medium-speed – only on diesel. In all cases, the ship entered the port of 1 to 1.5 hr diesel must be translated into diesel fuel for the complete cleaning of the injection system of heavy fuel oil. To The diesel engine on heavy fuel heater, filter and piping connecting the pipe to the fuel NVD, warm. Then let the fuel pump is self-contained to create the circulation of fuel through the mixer elements fuel supply system back into the mixer. In the presence of the connecting pipe between the heater and piping from the fuel return line to the mixer pump NVD Table 1 Temperature heating, C The fuel in the fuel tanks in the slop and supply tanks to the nozzles for the separation motor fuel DT Bunker oil F5 Fuel Gas turbine fuel DM 5 5 20 15 50 50 70 50 65 70 90 70 70 Not is separated 105 60 fuel system is possible through this tube. The fuel injector is purged, which creates a few high blood pressure in the pressure pipe as long as from the pre-open air outlet of the nozzle starts to leak fuel.