Quote Originally Posted by Shawn McGinnis View Post
Are you getting stable RPM readings? For the AF-2500, tach time is hours on engine above 1250 RPM. Hobbs Time is hours on engine above 0 RPM.
RPM is stable. While in continuous cruise flight, the elapsed tach and hobbs time are the same....and both in error. The clock is always correct. I have dual lightspeed ignition and I have the electronic adapter box you guys provide to get rpm signal from the lightspeed to the analog unit.