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Old 05-15-2020, 06:36 PM
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capnward capnward is offline
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Congratulations on chasing down the problem. The question remains, what caused the diaphragm to disintegrate? I suspect the previous use of ethanol fuel, which IMO degrades rubber. Adding MMO to the fuel will also help preserve the diaphragm and the bowl gasket. I think if you use non-ethanol with MMO in a rebuilt pump, that problem won't happen again.
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