A neighbor gave me a 7500W generator. It's been sitting quite a while,
so I cleaned the mouse nest out of it, cleaned the carb, etc.

Now, the gas tank: it's a 5 gal poly tank with a dip tube. It could
only be drained with a lot of trouble, so there was probably gas left in
it to evaporate. Do I need to clean it and, if so, how?

Thanks,
Bob