Bill's questions are good ones.
You have cleaned your carburetor and added some fuel treatment and your engine is running better.
Where did the KRAP come from and is there more of it?
The dirty carburetor is the symptom. Cleaning it is of course necessary but perhaps not sufficient.
I had an identical issue to yours - engine would only run with full choke - and traced the problem ultimately to a dirty fuel tank.
Hope that helps,
Peter
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