I ran my DA50 out of fuel let it sit for a few months and when I tried to start the plane it would not draw fuel. I had to take the diaphragm plate off and push on the needle to free it up. The engine drew fuel and started right up after doing that. Then after flying that day I didn't run the engine out of fuel. I just use the throttle cut on the tx. I started it yesterday without the stuck diaphragm needle issue. So I'm starting to think that it's better to just leave a little fuel in the carb that to run it out. It doesn't dry out as easy.