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The Norfolk Broads Forum / Broads Boat Owners Q & A / Seamaster Electrical Parts Identity
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Posted By Discussion Topic: Seamaster Electrical Parts Identity

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Ventura
Feb-13-2020 @ 8:03 PM                           Permalink
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Was wondering if anybody new what part this is. It looks like an ignition coil but the boat is a Seamaster with twin BMC 2.25 diesels. The big red wire runs straight to the battery positive.

Thanks

Eugene


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Regulo
Feb-13-2020 @ 8:28 PM                           Permalink
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Looks like a starter solenoid to me. (A heavy duty relay, basically). Do you know where the yellow wires go? To the engine starter motors, if I'm correct. Never a given, where I'm concerned!

Regards, Ray.

Whatever happens now, I'm blaming it on Brexit. Everyone else is!


This message was edited by Regulo on Feb-13-20 @ 8:30 PM

Ventura
Feb-13-2020 @ 8:51 PM                           Permalink
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Hi There

Thanks for the quick response...Not sure about the yellow wire....ill take a look tomorrow.....think it might go to the ignition switch

Stingers
Feb-13-2020 @ 11:09 PM                           Permalink
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Eugine,
To me it looks like a diode pack that splits the alternator charge between 2 batteries. I guess you've got one alternator with a starter and a domestic battery.

Andy

Regulo
Feb-14-2020 @ 1:17 AM                           Permalink
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Looking at it again, I'm a bit puzzled. Looks like a large red and large yellow to one terminal (which would be battery positive, then a large yellow and medium yellow to another terminal, and then a third terminal with a brown/yellow, red, and an indeterminate colour too! So assuming it's a diode splitter, the output from the alternator would be possibly the brown/yellow? But then where do the thick yellows go?

Regards, Ray.

Whatever happens now, I'm blaming it on Brexit. Everyone else is!


This message was edited by Regulo on Feb-14-20 @ 1:25 AM

Ventura
Feb-14-2020 @ 2:54 AM                           Permalink
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It's a twin engine boat...does that mean there would be two of those. O e for each starter

Steve51
Feb-14-2020 @ 7:08 AM                           Permalink
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It looks like an old Lucas part. Something like a 4BD splitter.

Steve. CM1 and NR12

Regulo
Feb-14-2020 @ 3:58 PM                           Permalink
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Yes, that looks like it! I now see that the large Red I thought was on the front terminal is actually on the rear left. Still can't see the logic of how it's wired up, though?

Regards, Ray.

Whatever happens now, I'm blaming it on Brexit. Everyone else is!

Steve51
Feb-14-2020 @ 5:48 PM                           Permalink
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Without seeing the whole thing, I have no idea how they've wired it up. They did some funny things at Great Dunmow!

Steve. CM1 and NR12

Ventura
Feb-15-2020 @ 11:27 AM                           Permalink
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The red wire is to the battery positive. The night yellow wires a joined to brown wires of the same thickness under the dash and go back to the engine.

The brown and yellow and the other small wires all go to the positive bus on the fuse box.



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