> I'm having a problem with a TR3 SU carbs weeping fuel
> from the jet
> bearing area. I tried the O-rings for the jets from Moss and a
> different vendor, both leaked. Went back to hte original corks, still
> weeps (though less) (nb. the rubber O-rings all got much bigger
> rather quickly)
That's strange. They must be the wrong material (EPDM instead of Buna-N).
But the ones I got from Moss worked just fine and held their shape well even
after several years of daily driving.
> Could it be the upper copper washer at the
> jet bearing?
The washer on the upper bearing only seals fuel from the carb throat. It
might be the rather larger washer between the lower bearing and the big nut,
but unlikely IMO. And if it was, you'd find fuel running down over the
outside of the lower bearing.
Did you check the jet itself ? I got replacement jets a few years back that
were made differently than the originals. They actually had a tapped hole
in the bottom of the jet body and a special screw that went through the
clevis and screwed into the bottom of the bore. They leaked between the
clevis and jet until I reworked them.
New spring inside the jet bearings ?
Both cupped washers in place and turned the right way (to cup the seals) ?
Seal seats in the bearings clean and undamaged ?
Sealing surface of the jet in perfect condition ?
One trick that might help : pull the jet down a bit (like applying the
choke) and spray some aerosol foot powder on the area (the stuff that dries
quickly to a white powder) . It should make it much more obvious exactly
where the leak is occurring.
Randall
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