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truckhors's avatar
truckhors
Explorer
May 02, 2026

Onan gerator

Unit turns over but wont fire.

Checked gas flow up to the regulator with a low pressure gauge. Im not getting gas out of the regulator to the carb. Removed the vent hose to illiminate that variable. Ordered a regulator on line. What i received was a used regulator. Thought i was buying new. Put it on anyways. Same result. The only code it throws is for over running the starter.

3 Replies

  • So this is an LP generator? What's your reading to the regulator on the manometer? If it's getting gas to the regulator but not to the carb, it could be in lockout mode (too low pressure, too high pressure). You'll have to clear the code and try again. Are you getting lp to the stove and any other appliances? 

    • truckhors's avatar
      truckhors
      Explorer

      I figured it out. The regulator cant create a vacumm with the vent hose disconnected. I blew out the hose and reinstalled it. It started right away. 

      • way2roll's avatar
        way2roll
        Trailblazer

        I was wondering about that. Thanks for returning to let us know.

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