>>28696358
Ya ran another half dozen bottles and it came clean.
Fired it up and shes idling again.
I guess ill just have to run it around town once a week instead of letting it sit for a few months.
There's no vapor recovery or vent system. Just goes tank>fuel pump>carb.
Cap takes care of expansion venting so it probably just pulled atmosphere moisture.

>Hot day
>Tank vents
>Storm comes through and rains
>Exposed cap pulls in fresh rain air
Repeat x 10 years.