Fuel Pressure

[Toronado]

So then you have fixed your problem, right?

[von]

No. Both Q jets I have still wick gas through the edge of the air horn gasket after sitting a while after engine is shut off. My point is, I don't think there is a fix. I'm guessing it's caused by either today's gas or gasket material, or combo of both.

[Toronado]

Its not the gas, because the pressure of the carbs
air horn against the main body does seal it with no wicking.
You also mentioned that it wicks after you turn the car off,
if it were the gas it would also wick while running. You say
it wicks from the edge, sounds like your gas is boiling on heat soak
& the level is rising to soak the gasket. It should not
leak gas Cliffs carbs dont wick gas and there the same type of carb,
so it must be fixable.

[damoroso]

Have you verified your float level?  I've seen this happen when everything else is good, but the float is a bit high.  Running the float to high is not a good thing...might be worth checking.

[73ss]

I've seen the wet gaskets alot too. I did a motor home carb. '87 chevy G-30. Last of the q-jets. Anyway, It had what appeared to be a plastic airhorn gasket. It also had the additional airhorn screws. The replacement gasket was plastic too. No wetness. GM must have addressed this problem toward the end of the q-jet run. I would assume the wet gaskets are normal to a point. You have a paper gasket over a bowl of fuel. Hit a bump, Hit the brakes, It's gonna splash.

[slowpoke]

the fuel level should not be up that high to wick into the gasket and it does not splash sitting still.
sounds like fuel level getting up too high maybe due to hot temps boiling the gas after shutoff sometimes a carb insulator gasket helps this. I had a problem with fuel boiling on an edelbrock after i ran it and shut it off I had hard starting and the insulator cured this problem.