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?
