Alright, so I replaced the entire ignition system, and there you go, she runs again.

I want to thank everyone for the help and support!

I will replace the heat riser spring as soon as I can source one here in Germany, but it was not the issue and is stuck in the closed position because of the counterweight.

I did not have the patience to check the components individually, but I suspect the ignition coil failed (weakened) due to not having a ballast resistor (now has one) wich made it impossible for the electricity to run trough the corroded plug wires.

I hope this can help future bolters somehow.

Frohe Weihnachten und guten Rutsch

Max