Chainsaw Repair

Bought two more of the ms150tc's today, fueled them up at the jobsite and one of them was Dead ON Arrival!  Lol.  Would fire and backfire out the exhaust. Took it backed and swapped it for another! No issues...  possibly a sheared or improperly installed fanwheel or coil assembly as the timing was off.

First problem like this I've ever had with a new saw, kinda odd...