I was thinking of only about putting in 5 or so gallons AFTER I SIPHON OUT THE BAD STUFF. I have 2 1/2 feet of space between the gas inlet and a block wall so space is a problem. I have a pump that may work. If what I do doesn't work then I will be crawling under to remove the tank. I have seen a lot of varnish and have cleaned several motorcycle and quad carbs. They are clean and stabilized. Start right up. I know I will have to clean the genny carb.
Selling isn't an option. I owe too much on it.
A former coworker told me I would be bored when I retired. Not really. I have plenty to do.