I have a new JBA 15, which comes with an oversized carb, so I switched this one out and put the bigger one on the Copperhead.
Then I found a cordless drill I can use to start it. After some tries I found the ring with the ignition pickup magnet loose.
So the timing was off and I finally got it to run, I can start it by hand now. The timing is not perfect yet, but getting there...