Just for an idea how decieving this "when hot" idea can be.
The landlord runs a fleet of 2000 series Cubs ( 5 now).
Some of them would run fine for an hour or so then backfire, loose power be impossible to start so we went down the things that get worse when hot route.
Ended up some 100 or so hours latter being nothing more than a plug of grass getting sucked into the fuel tank outlet.
Clean out the tanks on all of them and they have been faultless since.
Funny, I had already added "dump out fuel tank" to my list of things of things to do when the rain stops, just in case there's something in there that's plugging up the outlet periodically and starving the thing of fuel.