Reliable operation of a ship's propulsion system requires trouble-free fuel flow from tank to the engine. For marine diesel engines on yachts, the fuel system consists of a tank with tank ventilation, various fuel lines, a fuel feed pump and fuel filters. Level sensors, as well as shut-off valves and fuel valves, are integrated. When the boat engine is running, diesel is drawn from the diesel tank by the feed pump via a suction line. The diesel flows through a pre-filter system with water separator, e.g. a SEPAR filter. After passing through a fine filter behind the pump, the diesel enters the injection pump and is pressed through the injection nozzles at a precise time. At the outlet of the injection nozzles, part of the diesel is finely atomized and enters the combustion chamber. The rest of the diesel is fed back into the tank through a return line, also called overflow line. Under certain conditions, today's diesel tends to form bacteria, yeasts and moulds. This deteriorates its flowability, clogs the filters and blocks the pipes. To prevent this, it is recommended to add a fuel additive when filling up the tank. This avoids fuel ageing and diesel plague on board and keeps the fuel system clean.
Fuel system
