This was posted on another forum. Could be quite dangerous for boaters with enclosed engine comparments:
As the tittle states: anyone using pump fuel and braided style line (this includes ALL braided lines EXCEPT speed flex and ultra flex 650) need to be aware, that depending on where you live these lines can and will become degraded from using pump gas !
I have installed pro-lite 350 for fuel trans etc. and have just noticed a scent of fuel. Upon further inspection it was directly from the line itself NOT the fittings. Some areas of the hose also felt spongy, this line has only been on the car 1 mo. with fuel !
Today I called earl's /holley and spoke w/Kevin Cochran who designed the flex series lines and is there engineer for over 25 +years. He told me that he was aware of the problem and that the only solution is to use a teflon core line (barrier style). The core he states is the SAME on ALL the braided options except the 2 that have a teflon core. Both earl's and aeroquip use the same mfg. (Parker) to make the core which is a rubber nitrile base. He went on to state that there are over 23 blends currently of gasoline and some may or may not effect these cores.
How the events will unfold:
First sign of a problem: is the scent of fuel through the line
Second: when the line becomes spongy
Third: it will turn to cottage cheese......and at that point who knows what additional disaster this could bring !!!!
THERE is a disclaimer (posted on the site) that he is quick to recite regarding any questionable fuel additives. I mentioned I have never had an issue before , then he asked "were you using pump gas "?, the answer was NO. He went on at that point to say that if you are using race fuel , alcohol, and or synthetic oils, trans/motor that there is not a problem.
He was familiar w/the parker earl's supplier in my area and they will replace all my fuel line w/the super flex tomorrow, at no charge...(I cracked for the ultra-650, no dice list is 22. per foot!! and the fittings cost even more than the standard ends)
For all of you using braided line, w/the exception of the 2 listed above, you may want to get a closer look/smell at those fuel lines.