leaking around throttle shaft is what i assumed you meant.if so the bores for throttle shaft have worn oblong and need to be rebushed. if you are talking about a shaft other than the one for butterfly then disregard my response. high float or stuck needle and seat wont leak around the throttle shaft. ----- Original Message ----- From: "Mike" <[EMAIL PROTECTED]> To: "Air-Cooled Volkswagen Discussion List" <[email protected]>; "Bug List" <[EMAIL PROTECTED]> Sent: Thursday, May 03, 2007 6:18 PM Subject: Re: [vintagvw] Is There a Quality Carburetor Out There?
> Nick, > > Leaking around the shaft can be a float level that's too high or a sticky > float needle valve. The height is 'adjusted' by the thickness of washer > that's used under the needle valve, when it's installed into the the carb > top. A thicker washer results in a lower fuel level in the bowl, while a > thinner washer results in a higher level. Sometimes, the float can be > further tweaked by bending it a little, if it's got a brass arm. Have you > checked and set yours? You did make a fairly big change when you replaced > the leaky original float with a good used part. The manuals or rebuild > kit > instructions will usually show what the level should be and how to check > it. > When parked, the high level overflows into the barrel and because it's > not > being sucked into the engine, it collects on the closed throttle plate, > and > seeped out of the shaft bore. The bore can't be an extremely close > tolerance, or the throttle would bind excessively, possibly getting stuck > wide open. That would be alot worse than a tiny amount of fuel seeping > past > the shaft. There's no seal there, just a brass, nylon or teflon bushing > to > take up most of the gap. > I suspect you have a good carb there, just a little is tweaking required > to remedy the seeping. > > HTH, > Mike B. > > ----- Original Message ----- > From: "Nicholas Stokes" <[EMAIL PROTECTED]> > To: "Bug List" <[EMAIL PROTECTED]> > Sent: Thursday, May 03, 2007 8:58 PM > Subject: [vintagvw] Is There a Quality Carburetor Out There? > > >> Is there a decent 34 PICT-3 carb available out there? >> >> I purchased a new Pierburg hoping that it along with my SVDA >> distributor with a CompuFire ignition would keep my daughter's '74 >> Standard happy for quite some time. >> >> Well... the distributor from AirCooled.net works great and gives the >> smooth acceleration and performance I had hoped for but the carb has >> not lived up to expectations. The first problem at about six months >> was flooding out which was diagnosed to be a split float full of fuel >> which I replaced with one out of a 30-year old one in the parts bin. >> Now, a few months later, there are signs that it is leaking around >> the shaft. >> >> Any recommendations out there? I'm not looking for any extra >> performance, just something reliable. All though an extra boost >> would be acceptable as long as it works properly with the SVDA dizzy. >> >> Thanks, >> >> Nick >> VintagVW > http://homepage.mac.com/stokester/VintageVW/ >> Dub~Tunes > http://homepage.mac.com/stokester/dub_tunes >> >> >> >> _______________________________________________ >> vintagvw site list >> [email protected] >> http://lists.sjsu.edu/mailman/listinfo/vintagvw >> > > > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
