[:@] Helpppppp I hate this engine I bought it because i wanted to try it out I installed it in my RTF spit it runs for a couple of minutes then it dies....I wish i knew a way to send this piece of SH... back i almost crashed,anyone can help maybe it runs bad inverted .....help please,any sugestions besides trouwing this thing out.[:@][&:][:'(]

If you could give us a discription of what it does before it quits, that would help. We need to know the "symptoms" to help diagnose the problem.
It might be too lean and over-heating and quitting, do you have it fully cowled? Are the blue needle adjustment limiting collars still on?