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Old 14-08-2012, 08:16 PM   #1
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Battery charging problem.

Houston; we have a problem.
Battery is okay but it's not getting a charge.
The V6 has 2 voltage regulators, 1 must be okay as the rev counter works.

How can I check the other?

Or could it be something before the regulator?

What's the test procedure peeps?
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Old 14-08-2012, 11:09 PM   #2
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swap the grey wire on the loop to the unused grey wire on the 2nd voltage regulator and see what you get?
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Old 15-08-2012, 12:23 AM   #3
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regulator test

Hi,
Here a procedure to test the regulator on your merc 200 2.5 using analog multimeter.
I've also the procedure for digital multimeter.
and her the procedure for alternator too.
Hope this helps
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Old 15-08-2012, 10:08 AM   #4
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Quote:
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swap the grey wire on the loop to the unused grey wire on the 2nd voltage regulator and see what you get?
I see what your saying here Captain, If the rev counter don't work on the 2nd regulator, that's the faulty item?
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Old 06-09-2012, 01:36 PM   #5
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Captain, finaly got back to checking for the problem.
I've swapped the grey wire from the top regulator to the bottom one, rev counter does not work.
Swapped it back, rev counter works.
No change in charging state either way.

Replace the bottom regulator?
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Old 06-09-2012, 09:58 PM   #6
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You should only have one regulator and one Rectifier !! Grey Tacho wire is connected to one of the 2 yellow wires on the Rectifier. Swapping to the other yellow to see if it still works will indicate a fault but following the test in above post is more accurate.
Being a merc it is almost certainly the Rectifier anyway and not likely to be the regulator that should only have a Red & a Black wire to it.
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Old 07-09-2012, 01:40 PM   #7
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Bob,
I've got 2 units situated behind the trim solenoid plate, both have 2 yellows 2 reds and 1 grey.
The yellows go to the stator, the reds go to the starter solenoid, the upper grey goes to the tacho (lower grey is spare).
Where is the rectifier situated?
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Old 07-09-2012, 02:37 PM   #8
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Maybe I am a bit out of touch but have not seen one with 2 Rectifiers before !!
Area seem right and I assume those are the only three terminals on them. Do you have any pictures of it ? do they look like this ?

http://t1.gstatic.com/images?q=tbn:A...HpZQtMXtjAqL-A
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Old 07-09-2012, 02:37 PM   #9
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Mounted here ?

http://www.marineengine.com/discus/m...479/376515.jpg
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Old 08-09-2012, 09:29 PM   #10
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Are they 1 water cooled reg in the exhaust plate behind the coils and one "normal" type
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Old 10-09-2012, 06:01 PM   #11
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Are they 1 water cooled reg in the exhaust plate behind the coils and one "normal" type
Nothing is water cooled in this area ,,,,, unless a pipe bursts.
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Old 10-09-2012, 06:53 PM   #12
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I've got a couple of pictures but to large to post, can't remember how to re-size the feckers, work in progress!
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Old 10-09-2012, 08:51 PM   #13
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If its the 40 amp system these 2 regulators on the back of the engine . I removed them on mine when I went to 16amp and lightened fly wheel. I might still have them some where.
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Old 10-09-2012, 08:51 PM   #14
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email to ocrda@btconnect.com

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Old 11-09-2012, 07:54 AM   #15
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Quote:
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If its the 40 amp system these 2 regulators on the back of the engine . I removed them on mine when I went to 16amp and lightened fly wheel. I might still have them some where.
Some confusion here, there are 2 regulators on a V6 but where is the rectifier?
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Old 11-09-2012, 08:12 AM   #16
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There isn't one on your motor
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Old 11-09-2012, 09:03 AM   #17
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How does it work without a Rectifier ?? I cant believe even mercury use a Dynamo !!
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Old 11-09-2012, 09:04 AM   #18
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Quote:
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Some confusion here, there are 2 regulators on a V6 but where is the rectifier?
Is it not like this ??
http://www.marineengine.com/discus/m...479/376515.jpg
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Old 11-09-2012, 09:44 AM   #19
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How does it work without a Rectifier ??
Witchcraft
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Old 11-09-2012, 04:48 PM   #20
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Link don't work Bob.
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