Topic: Seamaster Electrical Parts Identity


Ventura    -- Feb-13-2020 @ 7:03 PM
  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


Regulo    -- Feb-13-2020 @ 7:28 PM
  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 @ 7:51 PM
  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 @ 10:09 PM
  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 @ 12:17 AM
  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 @ 1:54 AM
  It's a twin engine boat...does that mean there would be two of those. O e for each starter


Steve51    -- Feb-14-2020 @ 6:08 AM
  It looks like an old Lucas part. Something like a 4BD splitter.

Steve. CM1 and NR12


Regulo    -- Feb-14-2020 @ 2:58 PM
  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 @ 4:48 PM
  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 @ 10:27 AM
  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.




Regulo    -- Feb-15-2020 @ 1:42 PM
  So we assume you have two alternators, two ammeters and -  how many batteries? It's still a bit confusing to me, but it's difficult to know without actually seeing where all this fits. What are you trying to achieve? Is there a problem with the set-up, or is it just for your own need to know what the object is? Whatever, it doesn't look in very good condition!  Wink

Regards, Ray.

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


annville    -- Feb-15-2020 @ 2:20 PM
  Hi Ventura It's likely to be a 100 amp plus solenoid switch what does it ie when you switch on does it click/clunk, what ever it look past its days and if the rest of your wiring is similar suggest you get it replaced you don't say if you have one or two engines twin alternators how many and if more than two banks, you say the wires go to the dash what/where are they connected to, need more info. John


Ventura    -- Feb-15-2020 @ 3:20 PM
  Hi There

Based on the replies (Thanks) I think Steve51 has correctly identified the part as a Lucas split charging system.

I was just tryig to identify it. Im going to replace it based on the other peoples observations...Thnaks again.

Ventura

https://www.ebay.co.uk/itm/Vintage-Lucas-Split-Charge-System-4BD-Blocking-Diode-Land-Rover-Etc-/352692821321


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