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Mercury Racing Alternator Question

Old 05-23-2018, 08:35 AM
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Default Mercury Racing Alternator Question

I have Gen VI 525SCs and both engines have a 2-wire isolator mounted to each alternator. The mounting ear on one has snapped off and I need to replace it. Does anyone know what Mercury calls this thing or maybe a part #? I cannot find it on any parts schematic. Its a small rectangular box about 1"x1"x3". Thanks.
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Old 05-24-2018, 10:48 AM
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try bam marine
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Old 05-24-2018, 11:30 AM
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I spoke with him, waiting for a photo so I can figure out what it is.
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Old 05-24-2018, 11:37 AM
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https://www.perfprotech.com/mercury-...-thru-0l415623

https://www.perfprotech.com/mercury-...-thru-0f877734

maybe this might help
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Old 05-24-2018, 03:30 PM
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Originally Posted by Mbam View Post
I spoke with him, waiting for a photo so I can figure out what it is.
I am not near the boat for a few days but I can tell you its not a voltage regulator because it only has two wires, red and white. Its gotta be an isolator of some sort. And its a stock part with a single thru-hole that uses the alternator housing bolt to mount. It is NOWHERE on the factory diagrams.
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Old 05-24-2018, 05:15 PM
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Thunderous... any of the images show the part you're after if you search for Mercury Racing alternator under images (ie. Google)???
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Old 05-24-2018, 05:24 PM
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It's probably a capacitor/condensor to damp rf interference


like this? https://www.ebay.com/itm/UZB111-alte...-/231355877084

if it's got two wires and a ground lug then it's a regulator

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Old 05-24-2018, 06:03 PM
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I have image searched 10 pages deep on Google no luck. Its not a voltage regulator, it only has two wires and you'd need at least three for a VR. Besides, I think all the blue engine Merc alternators were internally regulated. I suspect it is an isolator to prevent electrical system interference. I hate I posted without pics but I figured for sure someone would know.
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Old 05-25-2018, 06:01 AM
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yup its a RF interference module. had one short out and pop the breaker on the starter, on a buddies boat last year. if you don't use the am/fm radio its not needed.
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Old 05-25-2018, 07:17 AM
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Originally Posted by RGPIII View Post
yup its a RF interference module. had one short out and pop the breaker on the starter, on a buddies boat last year. if you don't use the am/fm radio its not needed.
needed for vhf also I would say.
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