My 912 UL will not shut down
in 912 / 914 Technical Questions
8 years ago
I have a motorglider with a 912UL Rotax. when I am at altitude and shut down engine, it will not stop. Acts like one or two cylinders are running by pre ignition. Have spoken with mechanics that teach in Rotax schools. Been told that I may have broken ground wire in the electronic ignitions. Was told by one the key switch could be bad. Changed all at a 2 grand cost and problem remains. I was also told that it could be carbon build up and the hot carbon could be igniting the fuel with the electronics grounded. Did bore scope with HD bore scope, it shows cylinders and valves look good. Out of ideas. Any thoughts you guys may have would be appreciated.
