We have been drom FL to Michigan and almost baxk home in the last couple of weeks. I now shut off the air conditioners for 5 minutes before shutoff for fuel. It starts up, though I do have to hold prime 20 seconds or it starts, sputters, and dies. I think there is a slight vapor lock, but it is fine after priming brings in some fuel.
I ran in 90+ temps a lot, and 97 in Mich. Never had a single problem. Map40 abd Down The Avenue hit it right on the nose. Letting it run for a few minutes without ac cools it down enough that a prime gets it restarted every time.