I wrapped Teflon tape around the needle screw for packing. The screw threads turn easily in the Teflon and no leaks. I tried O-rings around the needle shaft, but had to tighten the gland nut to prevents leaks; then the shaft was too tight to easily turn with the cockpit control. I used a Volkswagen speedometer cable for the flex shaft; this works, but does have torsional windup before the needle screw starts to turn. Still looking for a flex shaft that does not have the torsional windup.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA > The one thing I was never happy about with the setup was that there was > a packing and gland nut on the carb around the mixture screw that had to > be loose enough to let the shaft turn, but tight enough so it would not > leak. A much better setup would have been something with an O ring. It > seemed to work fine in the 40 something hours I used it, but it was not > going to last forever. > > On 4/7/14, brian.kraut at eamanufacturing.com > <brian.kraut at eamanufacturing.com> wrote: