The Zenith carb model 14998 has been used on tens of thousands of farm tractors and industrial engines. Zenith carbs and repair parts and kits are only sold through retail dealers. Prices vary. The model 14998 is an updraft carb with a side draft air entrance. This carb will not function properly with negative g operations due to having a float bowl. The factory supplied float valve pin, idle jet seal and main jet seal will not tolerate ethanol fuels. 100LL and ethanol-free fuels work fine. There are aftermarket kits available that replace the seals with ethanol tolerant seals. I do not know what the rubber seal material is made of. The main jet is adjustable for mixture control, but tends to leak around the shaft if the gland nut is not securely tightened after the mixture is adjusted. With the gland nut tight, the mixture cannot be adjusted. The model 14998 is a good size match for the 2180 cc VW that I am using. I paid $286 for this carb from Great Plains Aircraft; the GP website now quotes $387. There are other carbs specifically made for aircraft operations; prices vary.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA ---------------------------------------------------------------------- Is that a side draft carb ? And for which engine ? Virg

