Since it is a 4 stroke, unless the exhaust valve is propped open, fuel can't run into cylinder and even if it does, as long as you don't turn the engine backwards, it has to come out on the very first revolution. It is not like a 2 stroke where the crankcase fills with fuel. There's not really too much problem except that the exhaust will point upwards and spray onto the fuse. Also not too much of a problem with at 4 stroke since they burn a lot cleaner.

Blessings, Terry