ORIGINAL: TedMo
Ok here's your answer. Since apparently you have 3 lines, fill pressure and supply to engine. Perhaps you have not plugged your fill line after filling. If not then you do not get any pressure to tank. Why it will come out of pressure line when full is because that line is not restricted as is the supply line by means of the needle valve. I didn't originally realize you where useing 3 lines. That should now solve your problem.
Exactly!!! If your particular RTF (NexStar Select is a Ready-to-Fly) is missing the fuel plug for the GREEN fill line, then you have your problem solved. As TedMo stated, you cannot build up tank pressure to encourage the fuel to make it through the high speed needle valve and into the carburator. This OS .46 Engine does NOT have a pump.
You are NOT flooding this engine...this RTF does not flood! You have the condition above OR a needle valve on the low or high end that is set too lean.
Happy Flying!
