Here's what I did Tank didn't leak so I just cleaned it :2gal of apple cider vinegar, let it sit for a week, shake it up a little bit, drain out half of it, shake it up a little bit more & shake it,flushed it out with the garden hose, shake it ,empty flush out again, Flush & shake about four more times, empty, filled with Coca-Cola, shake it, empty, flush with kerosene, empty,fill with kerosene one cup two-stroke oil for storage time to use in flush with gasoline