Posted by MarkB_MI on December 06, 2021 at 04:22:15 from (174.211.35.62):
In Reply to: Hour meters posted by taem on December 05, 2021 at 21:50:24:
Are you talking about a proofmeter, where the hourmeter is integrated with the tachometer? Or a 'Hobbes' meter that's standalone? Even with a digital proofmeter, the hours COULD be based on engine RPM but probably aren't. Your operator manual will probably tell you. Hobbes meters measure actual time, because they don't have access to engine rpm.
If your tractor has an computerized engine control module, I suspect the ECM on your tractor knows more than just the number of revolutions or number of hours the tractor has operated. My outboard motor's tachometer indicates the number of hours the motor has operated, but if I plugged the outboard into a computer I could find out the number of hours it has operated at different RPMs. Obviously a hundred hours at 6000 rpm is different than a hundred hours at 3500 rpm or at idle.
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