It could be a low float level. You are running to long with the choke on. That creates a super rich mixture & can carbon up the plugs & pollute the oil.
Its possible the sock in the tank is plugged up if it has one.

Last edited by Wrenchbender Ret.; 12/18/2023 9:47 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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