Broke it in correctly, I think. Yesterday engine goes out with a bang. Opened it up today and bam, the connection rod snapped in half. ***, ran maybe a third of a gallon through it. I had the stock engine that came with the fun factor. NX-16 I think. What new engine u guys can reccomend that will fit and is more reliable.

OS .18 CV-RX will blow you away with how ez it is and how much more power there is.

Whilst I agree that the OS.18 is a fantastic engine, you would be able to get the NT16 running again for next to nothing. I have a couple of NT16s and find them extremely reliable, could be that you had a bit of bad luck and got a duff one. Was the engine yours from brand new? If so, a third of a gallon would surely mean that it was still under warranty?

Yup, send it to the CEN guys. They are fantastic in terms of warranty.