backfiring welder

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bigbruh

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I have a Lincoln g9 250 probably that backfires whenever I strike up now. Anyone have any idea what might cause this?
 

lavacarancher

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I don't recognize the model number but I am assuming it is a gasoline powered welder. The short answer is the carb probably needs to be cleaned and rebuilt. The long answer is any gas engine has a hard time transitioning from idle to some higher RPM. During that period of time the fuel/air mixture needs to be pretty rich otherwise it will back fire. That is the purpose of the accelerator pump in carbureted engines.
 

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