1 Lucky Texan Posted April 8, 2013 Share Posted April 8, 2013 Is the o-ring swelling due to the 10% ethanol in the gas now? no one seems to know for certain. There's plenty of other gasoline/ 'rubber' interfaces. maybe the o-rings were sourced wrong at w'ever company made the pump assemblies? Quote Link to comment Share on other sites More sharing options...
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