With about 14 hours on my -12, I was up a couple of days ago and after pulling back the throttle from climb to cruise, the Dynon starting yelling "Engine Speed" at me. Looking at the tach, it was jumping around between about 4500 and 6500, and when it jumped high, the Dynon lady got upset.
Now, the engine was running fine, judging by its sound, and it wasn't overspeeding. When I adjusted the throttle a bit, the tach stabilized at a normal value and it didn't happen again.
I assume this is some loose connection perhaps triggered at a particular resonant frequency. Any thoughts on how to go about trouble-shooting something like this?
Now, the engine was running fine, judging by its sound, and it wasn't overspeeding. When I adjusted the throttle a bit, the tach stabilized at a normal value and it didn't happen again.
I assume this is some loose connection perhaps triggered at a particular resonant frequency. Any thoughts on how to go about trouble-shooting something like this?