Over the past couple of flights I have noticed that the tach time has been increasing at an unbelievable rate. In particular, my last flight which lasted 1.35 hours (hobbs) showed an increase in tach time of ~4 hours. Tach speed for cruise is set at 2250rpm but most of flight was at less than 2000rpm. Also, after landing I noticed that the tach time was fluctuating between 14 hrs and 18hrs, but the next day it was reading a solid 18 hrs. Any thoughts? Yes I'm running version 3.0 and for the first 12 hours or so I didn't see this happening.