Mike, I use Gates fuel line (can't recall which variety), an electric pump, a filter before the pump and one before the fuel reaches the carburetor. I haven't had that problem at all and my fuel line is probably 6 years old. Ethanol will degrade rubber, though...you're right about that. The diaphragm I have is one of the orange ones. I've let it dry out completely several times but after 3 years it has not failed and last time I looked showed no signs of trouble. I'm not really sure what micron number filters I have...just haven't had those problems. Good luck!


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end