Seems like you had way too much oil. Then you said something about running it with no oil. That is even worse.Ok - here are some pics of the carburator.
View attachment 194494
View attachment 194495
Ironically, its brand is "Runwell". I removed the red part.
So, the general consensus is not to consider rejetting the carb, right?
We are assuming that this was all the doing of excessive oil in the fuel, if I understand correctly