All "good tractors" record time as a percentage of full rated rpm. There is no sense in racking up time at idle. Let the records show use and not the time one forgot to turn the key off.As well as using a real clock and not the tractors clock, as I've been told that some tractor clocks vary with rpm's.
That's my 2¢, I'll "SHUT UP, SIT DOWN" now.
Ron
fit a Hobbs if "time" is the concern.