Gentlemen.

I have an OS 120 surpass that I bought about 5 years ago. I stopped flying before I could install the engine in an Ugly stick 60.
I have since started flying again and have another Ugly sick this time the giant. I built a test bed in order to break in the engine, I was able to get it to run for about 30 seconds, just enough time to get over to the other side of the engine just as it stops. This has happened several times. I checked the glow plug and the driver, that`s not the problem. I have backed the needle valve out the two turns indicated in the manual and cracked the throttle as indicated. I have repeated the processes several times each with the same results. Unfortunately, I am not at home, but visiting in Florida, and I do not have my electric starter to make it easy. Any Ideas??

Thanks in advance

Larry