Acording to my dealer, it is a fuel bladder(that's what he called it) that is the problem. You should be getting a recall notice from Kubota on it. The recall notice calls it a MANDITORY REPLACEMENT CAMPAIN, FUEL TANK 2. When you get the recall, call your dealer and they will take care of it. In your case, call your dealer and tell them that your fuel tank is leaking and you would like it replaced under the recall. My recall notice was dated 9/22/2000. I don't have a leak yet but my dealer is setting up a time to come to my house to do the recall work. Also, if you have a problem with your 3 point hitch, they will retrofit your tractor with modified parts from Kubota for this problem. There was a service bulletin issued on this as well. Your dealer should be aware of both of these problems.