Hi,

Been a while since I've posted..Hopefully someone can help me out.

I have a mid 70's Ford 460. The alternator has failed on it. It is a Mototola mr12n451d.
I'm  looking to replace it with something compatible and more readily available but can't find any details that really help me cross reference it. A replacement Mototola mr12n451d is a bit expensive, and I'm seeing 100amp + alternators around $100 or less.

Any help would be really appreciated.
Thanks

Sent from my SM-A115U using SoCal Jet Boats mobile app

Exposed engine? Just a run of the mill GM 1 wire or even a 3 wire alternator.

Covered engine- a GM marine unit, pretty easy to source, ebay, Amazon, CP performance, jegs or summit.

Your brackets may need some adjustments, should be fairly easy.

Dan'l

Thanks for your reply. The boat has a covered engine... so I'll  definitely be buying a marine alternator.

The Motorola has one wire(battery), and a second wire yellow.. i believe is an exciter wire coming off of the voltage regulator.. without cutting the wire loom apart the second wire either goes to the coil, or the fuse block.

How would i wire that second wire, if it is an exciter wire to an internal voltage regulator single wire design alternator?

That is really all that is stumping me, as I'm not very knowledgeable with automotive electrical systems.

Thanks,
Kory



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