Rebuilt Thermoquad issue -- It has to be primed before start each time

So in the first test I did gasoline for 15 minuted in just the oil pans, In this test I did diesel for 24 hours in the oil pans and bowls. Not a sign of moisture coming through the oil pans or the bowls in either case unfortunately.
JB weld may not be a perfect&permanent fix like RustyRatRod said but it seems to be holding here although its only a couple of weeks old.

Any theories? The whole plastic part of the carb seems to be good after inspection and these tests..

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