GMS engines have a 2 year warranty, and Tower is amazingly easy to get along with when it comes to replacing things that we screw up. (Not to say you did- I don't know what the circumstances were) Call Hobby Services and tell them what happened, I'm 99.9% sure you will get a whole new replacement engine. If you ordered it over the net, you can go to the website and click on "my account" - you can find your invoice there, or call tower- they can find it also.