THJeff
Active Member
Fair enough. I was just curious if there was a simple process to run up the hours but it looks like there isn't. Funny part is my original tachs have 723 hours which is my mom's birthday, so very easy to remember and do the arithmetic going forward.I don't think it is possible to trick the AETNA tach into advancing without the engine pulse. I'm not doubting the tractor guy's ability, just questioning how he could figure this out. On a Cummins C, the tooth count is 127 pulses per engine revolution. To get the tach circuitry to function you would need to build a pulse generator to trick the Aetna into recording hours.
Too much sugar for a dime....or too many other more important boat jobs to tend to when proof of engine hours is a simple aas keepinh the old tachs with the boat to prove actual hours. You look at my dash and you see the tachs reading about 325 hours when the engine really have about 1600 hours on thm. I know the real TT and can get it in 5 seconds by adding the Aetna time to the time on the tachs that they replaced.