This one is driving me crazy! The engine runs fine in my 4star will starting up(perhaps a little rich) and throttles well in mid and high range. When I take off, the engine will die(usually on the first flight) after about 50 to 100' high. Does not make a difference how steep or shallow the climb. I've changed fuel tanks, fuel tubing, and went back to my 10% nitro fuel(w/caster oil) after using 15% synethic. All to no avail. I've even changed engines and thought I had it but the problem resurfaced after the 4th flight. The fuel tank is about 1/4" below the needle valve(double checked). When I get the plane after dead sticking, the fuel line to the carb is empty. When I get more than one flight(rarely) it runs rich. Any thoughts would be appreciated.
Thx, Ed