Originally Posted by Turbo9000

Thanks for the reply


I have given up on this p&s set for now. I ran it for about 4 tanks easily and the pinch at operating temps is still way too tight. The engine doesnt seem very happy.

Anyways, i put another (what looks) slightly used P&S set in the engine that the guy included as a spare. It still has great pinch at TDC, so im going to give it a try.

The guy says he was running 20% nitro, there is no shim under the head button. Should there be a shim under there?

This engine is a NS12S3 if that helps.