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 finally had time and the temp was good in the garage, to work on this.

Got the floats re-set and new top plate gaskets.... coated with some chap-stick. Took a drive around the neighborhood and it ran great....

Re-check for drips and pools in the barrels and saw none. Rechecked this morning, so more than 12 hours and no drips.

Viton did the trick.

[Superhawk996]

Viton did the trick.

(IMG:style_emoticons/default/smilie_pokal.gif)

Curious if these were Webers or are they EMPI knockoff?

I remember way back when I got my first IDFs for my original1.7L back in late 80s, they came with solid brass float needles. But subsequent rebuild kits always came with rubber tipped.

Somehow I thought Weber had probably migrated to rubber tips as original parts. Wondering if this is the case?

@malcolm2

[stownsen914]

Two questions:
1. What fuel pump are you using? It's possible it's output pressure is very low, and an inline regulator plumbed upstream from the carbs can only lower pressure from what the pump puts out, not raise it.
2. You don't have a return line plumbed, right?