Hello all, my engine (10V 144hp) has hardly any power and I guess wrong air. You can hear it too. With the connections it doesn’t matter where the tube goes. But I have read there a larger flange, on which no hose is attached. The only thing I found suitable is the secondary air pump, but the stub is free as I have seen on workshop drawings, right? And what can someone have moved a screw turned into the fir tree? It doesn’t seem to me that you want to close a flange with it. Can otherwise a leaky exhaust due to lack of counter pressure be the reason that it draws false air? Thank you and greeting Kadett-C