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Help, I’m running out of ideas

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Kirk Thomas

New member
Jan 19, 2023
Norfolk, MA
Hello all,
I have a 1966 IH Cub lo boy that was running great and suddenly went to a very rough idle and won’t stay running. I have replaced the glass sediment bowl, fuel line, carb, plugs and distributor cab with no changes. I can keep it running for a couple of minutes at a low idle only if I constantly adjust the choke. The plugs are fouling ( totally black) within minutes. Does anyone have any suggestions?
Thank you,


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