... fuel tank and low level fuel exhaust pump, to start up in emergency.3.7 Fully water cooled structure3.8 ... .5,Accessories (Option)External fuel tank, engine jacket water heater (below 4 °C), vacuum priming system, constant lift/ special check valve ... engine and genset control system, e.g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power ...