It's a possibility XMANS,...can't deny. The reason I went at it myself is the enormous procedure of sending out an engine and collecting it back in India, without suffering import duty all over again. The paper work and shipping charges are too ridiculous. Hindsight I could have been a bit patient and had it taken to Singapore during my next visit. But again , in the past I successfully recondition two YS110s quite well with parts from Central hobbies and this looked just as well.

The part# on the spare conrod packing matched what is in the 170CDI manual (parts diagram). I am unaware of the orientation I fixed it in, the part looked very symmetrical and I assumed it goes both ways without mattering. Thinking back I did notice two punch marks on the brass bushing (big end of con rod). I assumed that punch was done to secure the brass/phosphor bronze bush to the aluminum casting. Not sure anymore, possible an oil groove that requires some orientation to function well.

However, with the replaced Conrod, it ran 20secs very smoothly at mid throttle and then suddendly died out. I am concerned if the issue is more than the conrod. possibly a bent crankpin/crankshaft. After the first conrod failure when I inspected the crankpin it looked perfectly fine to me. The engine has overall run barely 20 minutes from the intial flick.

Can I get anymore thoughts from you guys? I wish I could send it across, would save me a lot of anxiety.

Thanks for the replies so far