Denny:I'm sure you check these but you do have the insuator block under the carb and you check the heat riser to make sure it's open As you discribe it only happen when the engine is hot. When you went to visit your friend for 30 min. the temp under the hood went up possible the gas in the carb bowl is perolating causing the float to rise shuting off the fuel.Also I don't know if the condenser in the disturbter can open up when hot causing a problem Just a thought
Paul
