Thanks. I do have a tailwheel so my carb is pointing up at about a ten degree angle when I am on the ground. I guess that would make a pretty significant difference in my float level.
My fuel flow is two to three times what the engine needs at full power, but the fuel pressure will also increase at a level attitude. Sounds like I need to put a bucket under the tailwheel, tie it down, and do another runup. Anyone else seen this problem on a taildragger? Having zero to with aircraft but having used Zenith carbs on racing motor bikes I'd say the float level was too low. (this is assuming that the aviation zenith carb has a float, if not then the fuel pressure could be too low) Regards Barry Kruyssen k...@bigpond.com Australia ----- Original Message ----- From: "Brian Kraut" <eng...@earthlink.net> To: <kr...@mylist.net> Sent: Tuesday, September 02, 2003 11:19 AM Subject: KR>VW/Zenith carb > I have been doing a lot of engine adjustments and running on the ground this weekend. I have a 2180 VW with a single mag and a Zenith carb. I believe that I have the idle and running mixture set correctly, but I am having a problem when I advance the throttle fast. If I push in the throttle slowly (three to four seconds from idle to full speed) everything is fine. If I go any faster than that it will start to cough and it will die if I do it fast enough. > > I had never seen this problem before on this or any other aircraft engine. This may just be because I always advance the throttle smoothly and slowly and this was the first time I have tried ramming it in. This may be normal for a plane without an accelerator pump. I tried adjusting the idle mixture richer and leaner, but it doesn't really seem to affect the way it reacts to a fast throttle movement. > > Can anyone else with this engine and throttle combination comment on this? > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html
