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Mercury 525efi ECU question

Old 07-22-2011, 08:25 PM
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Default Mercury 525efi ECU question

When you get a mercury ECU scaned is there any reason that the total recorded hours and the RPM break down hours don't match???
In other words if say the total run time hours = 100 and the RPM break down hours equal say 60 is this normal or is something going on??
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Old 07-22-2011, 09:34 PM
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the total run hours can not set back zero.
the RPM run log can be reset .
Mac
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Old 07-23-2011, 03:42 PM
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I spoke with a tech at Mercury and they said if the ECU was reflashed it clears all history prior to reflash.
I get that but I don't get the difference in total run time and the RPM break down hours being so different...
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