Thanks Konrad. First let me give you the link to the Kavan set up:-
http://www.modelengine.org/forum/viewto ... 1755#11755.
I have not set up my fuel supply like they describe as I have taken the press from the crankcase. My set up is as follows: Tank has two vent pipes (one to top of tank and the other to the bottom), and a klunk piped directly to the needle valve. The crankcase press is piped to a "T" piece. One outlet of the "T" goes to the press release nozzle on the carb and the other outlet of the "T" goes to the tank vent pipe that goes tp the top of the tank. The second vent pipe from the tank is closed off after filling the tank.
This arrangement works really well with high power, good idle and excellent pick-up with throttle. However, when inverted there is a problem at idle because the vent pipe that releases the excess tank press is immersed in the fuel and neat fuel is expelled through the release valve on the carb. The engine then cuts out. This problem with expelling neat fuel through the carb release valve would also occur with the set up as described on the MECOA site.
Please note this would not happen on the normal muffler press set up as there is no press release valve in that set up. How should the fuel supply be set up to avoid this problem using the Kavan press carb that incorporates a press release valve?
Thanks Stuart :?