I had one on a GP 2180. The Zenith's have a mixture control, but they use a needle valve that screws in and out. I used a Dremmel flex shaft to a pinion gear inside a machined block with a rack gear connected to a regular push pull mixture control knob and it worked beautifully.
I liked the carb and it worked good, but it did have issues with the mixture not being consistent at different throttle settings. When it was adjusted to run at the right mixture at high throttle it would go very rich at low throttle settings. It would actually get so rich that it would foul plugs after a low power descent until I added a mixture meter and figured out what was going on and started to lean it out every time I pulled the throttle back. I called Zenith and spoke to one of the application engineers there. He told me that the part number that Great Plains sells is the generic version on the carb. They have more specific versions for different engines and when an OEM engine company wants a carb they run it on a dyno and jet it correctly for each type of engine. I gave him the parameters on the VW and what it was doing and he told me to drill one of the jets and that should improve it. If you do a search on my name and Zenith you may be able to find the post I made years ago about which jet and what size bit to drill it. All said, I would use one again, but would definitely use a mixture meter and tweak the jets so that I did not have to change the mixture with each throttle change. -------- Original Message -------- Subject: KR> Carbs for VW based engines From: Phillip Hill <phill.h...@gmail.com> List-Post: krnet@list.krnet.org Date: Wed, November 21, 2012 7:37 am To: KR List <kr...@mylist.net> Does anyone have any experience with the Zenith carbs for VW based engines? Anyone currently running a Zenith? Pros and Cons. Phill Hill Collinsville, IL _______________________________________ Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. To UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
