Fred I believe that you have the same set up as I do, and there are both supply and return lines coming from the top of the tank going to the generator. I had to replace my lines, and had to drop the tank to do it. Since my tank was full I had to get 2 clean 55 gallon drums that had permanent tops and transfer the fuel to them so I could safely drop the tank. Mine leaked on the return side, but the lines were pretty worn out on both sides.
There is really not much room under that area to work so if you can get to a pit that would be ideal.