2005 J115PLSOR intake overpressure/raw gas?

[Harkonnen]

If you feel the reeds might be the issue, replace them.-----But they are very reliable and rarely cause problems.

I am at the end of my rope, because this is the only thing in intake I did not mess with (OK, primer, but that should not blow the connector lines off) - and I am pretty confident in the carbs.