Did you fill with E10? (And may be not know it) I have had that issue in the heat of summer and non ethanol unleaded sure does help. A cooler running engine may help as well. An insulator under your carb may help. A return fuel system may help. An electric fuel pump with a momentary switch may help those restarts. Are you seeing a trend here? All the things I mentioned may help but no one thing is a guarantee to cure the issue. The electric pump will help the "empty carb due to evaporation" issues and the return fuel system will help with the "vapor lock while running" issue if that's what you are experiencing. Gee, may be an electric pump with a return fuel regulator would cure both issues. :thumbsup: