Originally Posted by Freedom

If I want to run my Honda for 45 minutes I pour one pint of gasoline into the tank. When it runs out it turns itself off.
One of the worst things you can do for a generator is have it run out of fuel when it's under a load - (i.e. charging a battery, running the air conditioner.) It doesn't hurt the engine, it just dies, but it can hurt the electrical generator part. It's not a good practice if you want your generator to last a long time.