Zephyr 1100: Starter spins, but engine does not start

…where we are, I would have another topic: I now had two or three times the situation, that after turning the ignition key the green idle light as well as the red for the oil went on, the starter turned smoothly, but the engine did not start. It seemed that there was simply no ignition spark. I turned the ignition key back again and then again on ignition. Then the mill started perfectly. I would be careful on the Zün dschlossen tapen? Does anyone of you have similar experiences or ideas about what else it might be? Sporadic mistakes are always the most beautiful…