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Technical Support / Re: Onan generator 7500
« Last post by David T. Richelderfer on April 23, 2024, 02:56:11 AM »Yes, you could have an air leak allowing air to get sucked into the fuel flow. How long has it been since you filled the diesel tank? If a long time, then you could have water or algae in the fuel tank, or got filled with a bad load of fuel, in which case your fuel filter could be plugged... even after you recently changed the filter. Remember, the generator pulls its fuel from the very bottom of the tank. Have you driven the coach recently at highway speeds up any hills, and if so, did the engine run properly?