Most likely the backplate cracked from trying to start with the engine flooded, if it engaged the overheat sensor on the wand it was struggling to get it turned over. Flooding the engine is either from improper needle settings or from using too much fuel to prime it. The one way was from using the traxxas fuel with all that oil, it wreaks havoc on internal one ways but a little wd and it was solved. I checked the engine you sent in for return and i was able to get it started, needed a glow plug and the needles set. To break a some dogbones, and go thru some tires in 6 months isnt really that bad, replacing parts and repairing is part of this hobby bro. I own every brand of rc, you name it, i have it and they all, always need something fixed, tweaked or looked at.