I'm currently trying to break in my new O.S 46 AX in my boomerang trainer and i have run into some problems. I opened the needle to the starting position in the manual (1 1/2 - 2 turns open) and it started just fine until it suddenly stopped after using about 1/4 of a tank of fuel, so i tried starting it again but now for some reason when it starts it starts revving up and down like I'm moving my throttle up and down (but I'm not touching my throttle at all) until it just stops all together and it just keeps doing it every time i start it.. i have made sure its not flooded and it is getting fuel so I'm not sure whats wrong. This is only my second glow engine, so i don't really know much about them[&:].