I just read your original post and see that you've never made it to full throttle! There is NO WAY to properly break it in unless you can get to full throttle. I hope you didn't run it for too long...

Check your fuel tank and replace the lines. Make sure it's even or a little below the carbutator.

Turn the main needle our 2.5 turns and just run it there.

I HIGHLY recommend that you take it to the local field and get some experienced engine guys to take a look at it. You will be glad you did in the long run and there is nothing better than hands-on help.