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Old 06-23-2012, 04:13 PM
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ethanol and rubber fuel lines

i bought a fuel tank for my 58 chevy truk from no limit engineering a couple of years back. it has an in-tank fuel pump for the 350 ramjet efi. according to the ramjet manual, i only run premium fuel in the tank. the original in-tank fuel line that connects the pump to the tank outlet lasted exactly zero miles.

when i pulled the tank and pump the fuel line was in shreds. it was clearly marked ''not for submersion'' on the line. i wrote no limit and got no response from them. i replaced the line with a gates rubber line that was marked ''for submersion in fuel'' on the side. it cost me $29 for a one foot piece.

i get an average of 6 months or 2500 miles between fuel line failures. the last time was coming back from dallas on the power tour. i lost fuel pressure in the middle of kentucky. luckily i knew someone nearby with a garage, no tools or a jack but at least i didn't have to drop the tank on hot asphalt. i bought a $19 jack and $19 jack stands from a parts store, dropped the tank and cut an inch of the line to get back home.

the pump is your basic gm in-tank pump. the current line is 5/16'' rubber line from the pump to the outlet with screw clamps on each end. every fuel line replacement i have seen is rubber line.

what can i replace the line with, that will not be affected by the ethanol in most fuel now days?

this is the typical failure for the last 3 times. the line fails right above the clamp.
this time the whole line is soft from ethanol exposure, but the repair got me home...



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