I had this same problem in my 2000 Tr-21 and now my 2006 21X. I have tried all of the remedies mentioned and my boat still wreaks of gas. My question is why doesn't Triton step up to the plate and fix this. I am now reading that the newer plastic tanks have a double liner in them to prevent the permeation. We own $50,000 rigs and should not have to deal with adding vents, finding leaks, testing tanks, etc. Is Triton waiting for someone's boat to blow up or worse before they do anything? If it means taking the boat apart and adding a new tank so be it. Please fix us Triton.