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??
Thread: Mercury 525efi ECU question
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07-23-2011 02:06 PM
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07-23-2011 04:59 PM
If the ignition switch were left on without the engine running, would the ECU clock still tick away? On my boat I also hace a analog hour meter that will run without the engines on if the Ignition switch is left on.
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07-23-2011 06:12 PMLike Donskihp said, if the ECU is powered up, the total time is probably the total time the ECU is powered up.
I need to stay at a Holiday Inn Express to be sure though!•_•_•_▬_▬_▬_•_•_•
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07-25-2011 12:07 AM
I suppose the key could have been left on but in that case would it not register in the 0-1999 RPM range? There is .1hrs on the 4200-4699 RPM range and nothing after that.
The boat hour meter reads 230hrs, the ECM scaned 111, 100 & 113 total hrs and the run log hours 60.4, 55.5 & 63.7Last edited by ozarkdevil; 07-25-2011 at 01:22 AM.
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07-25-2011 08:49 AMThe break in time is part of the total run time.
Plus it is run time not key on time.
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07-26-2011 12:01 PM
I know on a 496 the "break down" hours can be cleared to zero with software, but the total hours cannot. The 525 ECU may be the same way?