Hello again,
to answer Fantine: The engine initially responded to the gas, but then ran uncontrollably. I don't know if it had any power as I didn't have a chance to test drive it.
I don't know the answer to the question about removing the spark plug connector. I was worried I might get an electric shock.
Sorry, Monza, aber wenn du Angst hast, den Kerzenstecker zu ziehen, werden wir nicht klären, warum der Motor weiterläuft.