Wet Weber Carbs

Jpicardi · 04-06-2021, 08:04 AM

Can anyone help me understand why there might be fuel or oil on the throttle lever under my Weber’s? They aren’t dripping just wet and sludgy.

Locker537 · 04-06-2021, 08:23 AM

Can you share a picture?

Check the accelerator pump area. The are prone to warping and leaking. My "weeped" and the fuel lingered around on the pump rod and up towards the throttle linkage.

If everything is a little greasy, I'd check where your oil breather is venting.

kav · kav's Garage

Does the wetness smell of gas? Then you have a leak.

If not, are the Webers very cold to the touch and wet after a drive? Then it's condensation and nothing to really worry about. The stock air cleaner had a pipe that took heat from the heat exchangers and added it to the air cleaner on top of the carbs to keep them from getting too cold and causing condensation build up. If you are running PMO rain hats like me then your Weber's will sweat. You either live with it as I do or go back to the original air cleaner.

Cheers

-Kav.

Jpicardi · 04-06-2021, 04:52 PM

Attached are photos of the throttle levers. They are wet but not dripping. There is a good bit of sludge around and underneath them that perplexes me as well.

Jpicardi · 04-06-2021, 04:55 PM

Here are the photos:

jpnovak · 04-06-2021, 05:05 PM

Several contributions.

Leaking throttle shaft support bushings and leaking fuel.

Time to pull them off, clean them up and install new gaskets. Check Throttle shafts from play and have them rebuilt as necessary.

BTW, you are missing a mounting stud...

75 911s · 75 911s's Garage

Yep, missing a stud on that front BBL. That could be a major vacuum leak. Is there a squeaky sound of it sucking air from that side? The studs are all wrong in fact. If this was my car, I would take the Webers off, clean them and replace the intake studs with longer ones. As you now have a phenolic spacer in there to account for (former CIS car I take it?) Those aren't self locking nuts either and they should be.

As for the oil, someone probably squirted some WD40 or something on the accel pump and around various points of linkage. Definitely oil product mixed with a slow fuel seep, probably from the throttle shafts.