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]

Just a side note on gauge vs pressure.

I wouldn’t trust that gauge as being highly accurate. It appears to be max at about 10 psi and you’re trying to measure down at 1- 2 psi. You can’t expect high accuracy when your nominal pressure and variances are only 10% of gauge and the gauge itself may only have an accuracy of plus or minus 2-5% at standard temperature (73.4 F) and atmospheric pressure (29.9 in Hg).

It may be reading 1 psi hot but it would be hard to tell if that pressure reduction is coming from the pump or the gauge getting hot in the engine compartment.