Weber 40 IDF is dripping Options

[malcolm2]

Nice day for a drive yesterday.... Drove some, filled up with gas and drove a bit more.



Woke up this morning to smell gas in the garage and noticed a pool of fuel on the floor.

I removed the air filter and see a drip in one barrel. 1 barrel is very wet and even has a pool sitting on one side of the plate. The others are wet, so they could be dripping, but less frequent. You know gas, it will evaporate pretty quick.

looks to be coming from the center of #14, Aux Venturi. I removed the Main Jet on that barrel (47 - 50), hoping to get it to stop dripping. I think it stopped.

What is causing this? (IMG:style_emoticons/default/WTF.gif)

I should add that Dual Carbs are new, set up at AC.net... now out of business. Last summer I fully adjusted, and sync'd them. Had been running really well, parked for about a month. Total of about 800 miles on the whole rebuild.

[Superhawk996]

Random thought:

Is your tank vented properly? Pressure build up in tank so close to heat source could pressurize tank and fuel supply leading to the flooding of carbs / siphon behavior.

[malcolm2]

Random thought:

Is your tank vented properly? Pressure build up in tank so close to heat source could pressurize tank and fuel supply leading to the flooding of carbs / siphon behavior.

Tank is vented. Picture is not mine, but in the picture of the tank above you can see the yellow hoses they go from the top rear corners of the tank, into the engine compartment and up into the D-Pillars then back down into the charcoal can. There is a "bulb" in each line going up into the pillar, i assume it can assist in pressure and siphoning.