Theis, Karl J wrote:
>
> I am having a problem with fuel leaking past the o-rings of the
> needle adjusting doodad on the bottom of my carbs. I rebuilt both
> carbs in '94 and last year replaced th o-rings after the front carb
> started leaking fuel out the bottom. I found the the o-rings to be
> cracked and brittle (after only two years of use). Now, the carbs
> are leaking again.
> Is there something in the oxygenated fuels served to us here in
> Denver that deteriorates rubber? Oxy fuels are created using either
> MTB(?) or ethanol. Should I avoid one or the other? Are there
> O-rings on the market that are resistant to oxy-fuels? Any comments
> will be appreciated. Thanks.
> Karl Theis
> '67 GT6 KC6353L
> '68 GT6 KC11856LOKarl,
If you can find a local supplier of O-rings, the material you're looking
of is Nitrile. Viton is another good, fuel resistant, material. Look in
your Yellow Pages under "O-Rings", "Hydraulics", or even "Bearings".
Good luck,
Charlie B.
Spitfire Pilot
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