2003 Mooney Ovation. Something occurred during my last annual such that the HOBBS meter has stopped advancing. I brought this to the attention of the A&P who has been unable to isolate the problem. He isn't sure what runs the hobs, however he confirmed that the HOBBS and the oil pressure sensor are functioning. He thinks there are multiple options for what drives the HOBBS , but he doesn't know what specifically runs my hobbs which is making the task of fixing the problem more challenging. Has anyone experienced such a problem. Thanks for any insight.
