It's absolutely amazing what little gremlins will show up after a trailer ride of a few hundred miles. Unfortunately these carburetors can be a touch problematic. Probably something simple that you will slap your forehead and say "why didn't I think of that" when you find it.
Take all of our suggestions in the spirit they are given, after all we are here to help not belittle you or put down your abilities as a mechanic.
