camperdave,
Don't be surprised when your generator goes belly up. It needs a cool down after running at close to full load with the air conditioner running. Read the owner's manual. Shutting it off when it's as hot as it can be is extremely bad practice. Onan recommends a 3 to 5 minute cool down:
Onan MicroLite 4000 Owner's Manual wrote:
STOPPING
1. Turn off air conditioners and large electrical loads before stopping to allow the genset time to cool down.
2. Let the genset run three to five minutes. Failure to let the genset cool down can cause engine run-on or backfire.
3. Push the Star/Stop switch to the Stop position.
You've been getting away with it so far but don't expect your luck to last forever.
