[scicala]

When you are experiencing the hot re-start problem, hold the throttle pedal to the floor when cranking to start. If it starts better that way, then you are probably experiencing the choke closing up (as stated by Fordestes) and or fuel percolating in the bowl from the heat after shutdown. The up to 10% ethanol in gasoline these days does this a lot easier than gas without ethanol.

Sal