Here's the scenario. Generator runs until it runs out of gas. I need to refill and run it more. The engine is hot, specifically the muffler is very hot. While filling the tank I am afraid that the fumes may ignite because of the hot muffler. I have thought about putting a towel, 2 or 3 layers thick to isolate the muffler from any fumes. The tank is on top of the generator and the muffler is about a foot away underneath the tank.
What is a safe way to refill a tank when the engine is hot. I can't wait for cool off because it would be running a sump pump keeping water out of my basement. Suggestions?