Ken wrote:
I've seen that happen a bunch of times (I've been a mechanic for the past 20
years), mostly with metal bowls. I've never seen an official explanation but
my best guess is that the evaporation of the fuel lowers the temp of the
bowl (evaporation uses the heat energy) and the lower temp of the bowl
coming into contact with the moisture in the air causes condensation. On the
bowls I've used I've actually watched the droplets form on the upper exposed
areas and then travel downward, mixing with the gasoline.

Ken


Thanks for the response. I had not seen this happen previously, in New
Hampshire we rarely get the humidity as high as we saw yesterday. Your
explanation makes sense to me.