PS when u primer motor it doesnt turn over same way it slows down almost to a stop thru each revolution after a few more rev with no primer it returns to  faster steady speed but does not start some times makes by passing sound when u r done cranking it over

sounds to me like you have a hot wire with some copper exposed and pinched in a tight spot somewhere you cant see..  i would myself strip the entire harness and start over...  if not that motor may have a demon living inside of it.. i would then take it all the way to every remaining part in one piece and go back together slow..  no cfm's at the carb is usually caused by a vac leak at the crank halves or possibly behind the reed plate but the sparks and intermittent electrical current sounds like a pinched wire.. look at all the purples or whatever color your enrichment circuit is running off