Stop in for a cup of coffee

ScampMike said

oddly - it STILL doesn't do well at all with the choke hooked up - flip it open, jam a tool in there and away it goes..

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You probably have it too tight, back it off so it's loose and just barely closed when cold. That way the airflow can push it open a bit while it's warming up and it will open up quicker as it heats up.