My 1963 Cub Cadet was getting junk in the carb, so a couple years ago I removed the one gallon gas tank, and cleaned it by using a handful of flathead wood screws and a cup of gas. I shook it up for about 10 minutes, and this is what came out. It looked pretty good before I started, and would have never guessed it had this much rust.
Fuel Junk.JPG
Fuel Junk.JPG