Thanks for your reply, Wolfe.
The generator runs fine under a load. So that tells me the carburetor is ok. Am I correct? The generator stops when I take the load off. Yesterday, I started the generator. It ran fine. Turned on the refrigerator, hot water heater and the heat strip. Generator ran fine for an hour. Decided to turn off the hot water heater. When I did, generator stopped running and would not restart.