Yep, w8ye is right.

Unload all of your other OS engines as well.

For the price of a good used OS you should be able to buy a "Brand New" Chinese engine. Lord knows that poor country can use the money.

I find it amazing that it flew for 9 months "making friction noises" and it didn't grenade itself....

Alex, it sucks that your engine broke. I can understand how you feel. You did your best to break it in properly and take care of it afterwards.

I'd have them send it back so you can try and figure out what happened to it. It may just need a ring and a rear bearing. I've got a lathe and a Sunnen hone. Maybe we can repair it.