Thanks alot for the replies. If you didn't get the video, its now working. ISP was screwy the last couple days.

da king: About the possibility of being the valve spring, Im not big on taking my engines apart. Could this be something covered under warranty?

mkirsch: Same thing above, would this be covered under warranty or would it be considered a "user error" ?

JIMMYTHEEAGLE: Yes, the engine died while going vertical. Right after take off I put it straight up. After a few seconds, BANG and down it came. The fuel I use is Wildcat 4-cycle/YS 20% nitro / 20% oil.