A replacement of fuel supply lines, fuel filters, fuel injection pump, high pressure fuel lines and injectors will let air enter the fuel system. Air in the fuel system will make the engine hard to start, run rough, misfire, and produce low power and cause excessive smoke and fuel knock. Replacing procedure of Air filter, Fuel filter of Generator: Replacing the fuel supply lines, fuel filters, fuel injection pump, high presser fuel lines and injectors will let air enter into the fuel system. One must follow the system to bleed the air from the system. Since the fuel transfer pump provides positive pressure through the fuel filter and supply line to the fuel injection pump, loose connections or defective seals show as a fuel leak and not as an air leak. For faster air purge small amounts of air can be bled from the fuel injection pump by operating the hand primer located on the fuel transfer pump or by cranking the engine. O...
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