Sid
You can buy a replacement high speed needle mixture assembly from a Great 
Planes.
I just ordered and received my second replacement one .
They always start to leak after 100 hours or so . Probably due to the mixture 
adjust linkage hanging from mine.
Just specify which Zenith carb you have (i.E. 1821 etc)
Chris Gardiner
KR2S C GKRZ 230 hours

Sent from my iPad

> On Jan 28, 2015, at 2:40 PM, Sid Wood via KRnet <krnet at list.krnet.org> 
> wrote:
> 
> I am still trying to fix fuel leaks on my Zenith carb at the mixture control 
> needle valve.  I know: All I need to do is tighten the gland nut, but then I 
> cannot adjust the mixture in flight.
> Misery loves company; they don't have carburetors, but I can identify with 
> these folks:
> http://www.pddnet.com/news/2015/01/vw-audi-porsche-issue-recalls-fuel-leaks?et_cid=4386517&et_rid=568671104&type=cta
> 
> Sid Wood
> Tri-gear KR-2 N6242
> Mechanicsville, MD, USA
> 
> 
> 
> 
> 
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