You need to completly empty the gas tank and start with fresh gas. Don't bother trying to filter the bad gas. Why take the chance any get water in the cylimders. 20 gallons of gas is cheaper than a rebulid.
I agree with the water seperating filter, but they can also creat a restiction in the fuel line. After installing one have a dealer or buy a vacume gauge. Any reading over 2.5 inchs of vacume is bad.
