A little water : Fill up and put 3 bottle of costal water remover from
Auto zone
and burn it out. If you ain't got no money. Get you 3 or 4 pints of
rubbing alcohol and pour in it on a full tank.
Make sure its PURE alcohol..and not the WATERED down stuff. I used to use
methyl hydrate.

Got a carb rather than fuel injection ?..if so, dont for get to drain the
crud out of the carb bowl