Who can help me to solve my engine problems?
After 1 year no flying my 912 UL runs very rough beyond 4000 RPM. When I pull the choke the RPM go up to 5000. Looks like too lean mixture, so I thoroughly cleaned tanks, all fuel lines and carburators. Inspected carbs according to heavy maintenance manual, and could not find anything wrong. Fuel flow is ok and fuel pressure also ok. But engine still runs just as rough.
Before this problem the engine has run fine for 200 hours.
Compression is ok, and ignition L, R or both does not make much difference. Asked many AMTs here and they don't know more than I do.
Who can get me into the Dutch air again?