Somewhat like posted earlier by another modeler, my 63 is running rich.

Tried running the low end needle at 1 1/2 turns out but to get it to even idle and transition well it has to be almost turned out so that the head of the screw is almost flush with the carb.

I have had the carb fill with fuel during some startups.

Tried setting the idle screw at 1 1/2 turns and tried to adjust regulator pressure so that I had a decent idle. Top end would suffer.

When I can get a good top end it will tach at about 10600.

Took everything apart and checked for debris but only found a slight burr on the carb barrel in the v cut and cleaned that.

At this point I have not checked valve clearance with a gage, but I did check it yesterday to make sure that there was some. Yesterday it appeared to have about the same clearance on both intake and exhaust, but today the intake appeared to have almost none.

What is correct valve clearance on the 63? How much side play should the rocker arms have?

Engine is mounted in a Something Extra ARF with the factory motor mounts mounted upright.

Prop is a Master Airscrew 12x8, fuel was a new gallon of cool power 15% with 2 oz of redmax oil added.

All fuel tubing has been changed and tank has been replaced.

I can get it running ok fly and come back and cannot get it started..

What else is there to check? I have seen little on how to adjust the regulator pressure and when, what is correct?

Have I covered everything? Do I have an oring or seal that is bad?