Hello, I already know that there are some reports on this topic and I read them, but somehow I can’t get any further with my problem. Our Speedfight 3 always ran quite normal……ok, every now and then 2 or 3x had to be started that it ran, but then without any problems. Starting got worse and worse and it had to be tried for a long time before it started (it started immediately, but went out again after a few seconds). Eight, there were no problems… even when starting when it is warm, there were no problems. But once it has become cold, always the same problem……….it starts immediately and goes out again after a few seconds. And again the same phenomenon that if you really make it run, it does not cause any problems while driving. Cold start was checked according to YouTube…….was i.o., but has nevertheless renewed it. Gasoline supply checked (there is enough gasoline b im carburettor) . Ignition spark available and new spark plug screwed in. Always the same problem……..starts immediately and goes out again after a few seconds (nothing works anymore in the second attempt). New carburettor installed ….. always the same problem. Then also new membrane installed and intake channel checked for tightness. Everything in order and again the same problem, that it starts immediately, but after a few seconds runs out again and no second start attempt more f yesterday I was busy for some time and got the scooter to run again and drove a few KM without any problems. Again in a warm condition no starting problem. But today again the disillusionment………. jumps immediately and goes out again after a few seconds and then again nothing goes. Does anyone have another tip that I could try? Greeting Erwin