How long has it been since you serviced the advance? If the advance is sticky it will make for squirrely idle and running.
Catch some fuel in a clear jar and hold it to the light to see how much water you have in the fuel.
As noted fuel pressure gauge would be helpful. Now and in the future.
TRUE GRIT
Edit: If closing the choke improves the idle then there is a problem with the fuel system.
Last edited by JOHN COOKSON; 02-25-2019 at 05:53 PM.
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