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.

[malcolm2]

I did pull the float on the worst side. I will re-check the float setting. IIRC that was one of the last things I did back in May.

My guess on the drip is pure surface tension. Bowl over fills. Fuel continues to seek a low level and is soaking in the gasket. Makes it's way to the venturi and is able to drip from it's low point.

So is there some residual pressure pushing past into the bowl? Maybe as you said some junk not letting the valve close?

Once on the table, I did a blow test thru the fuel inlet. Seems to block my air.