Assuming its a diesel generator, I would drian some from the bottom and check for water. If water is found drain it until it looks good, let it sit a couple days and repeat, maybe a third time if you still get water on the first repeat.
Then a biocide just to be sure you kill any growth that may be in there and some water in the diesel cure (Sea-foam?).
I used BioKleen in some very wet veggie oil that was producing some bad smelling gasses, could see lots of gas bubbles in the oil. 4 days latter, no more bubbles, although it still smelled bad.
Steve
--- In diesel_mercedes@yahoogroups.com, "max_stemple" <jasperezra@...> wrote:
>
> What should I dump in my 300 gallon generator tank this fall before I start running it. My fuel is at least 5 years old and has been sitting outside. It's almost full. Max
>
> --- In diesel_mercedes@yahoogroups.com, "ajrnemt" <ajrn@> wrote:
> >
> > Did you at least throw some SeaFoam in the tank?? Anytime I've got something sitting (when I know ahead of time) I dump a can (or more) in-- and try to "run it in..." It keeps the gas, and I think it does help in getting them (gas and diesel) re-started.. :)
> >
>
