Compatible Alternator?

[iboaterlurker5]

My old motorola alternator MR12N451D bit the dust. I am looking for a replacement one but I can't find specs of new ones. Product pages don't have a lot of info. The boat is custom built but uses a marine ford 460 (7.5L) engine. I tried matching a rated ford 460 alternator but it doesn't fit since it uses 3" foot. I need a 2" foot.

I need one to match the dimension specs of this one (discontinued):

Prestolite - Leece Neville

Prestolite Electric / Leece-Neville is a global manufacturer of alternators and starter motors selling into niche markets for heavy duty (truck, bus, emergency, off-road), marine, military and industrial applications.

www.prestolite.com

Single 2" bottom foot, 6.5" inch between mounting holes, marine certified, 1 or 2 wire hookup, single v drive belt (Gates 7312, 7/16" width) pulley.

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Would these ones work?

https://www.amazon.com/Alternator-1968-1987-Mercruiser-1981-1987-Pleasurecraft/dp/B00SG0HWR0/ref=sr_1_21?dchild=1&keywords=ford+7.5L+marine+alternator&qid=1622551755&sr=8-21

https://www.amazon.com/Discount-Starter-Alternator-Replacement-Mercruiser/dp/B084KHTYD3/ref=sr_1_11?dchild=1&keywords=marine+alternator+1+wire+ford+460&qid=1622480515&sr=8-11

 

[Alumarine]

Have you checked with a starter/alternator rebuild shop to see about getting it fixed?

 

[iboaterlurker5]

It is so old, 40 years old and low amperage. I have a hydraulic trim pump that pulls 20 amps alone now (old alternator only rated at 37amp peak). I rather just get a completely new one.

 

[Lou C]

A suggestion is to call the tech line at ARCO marine in Florida, they may be able to tell you which of their products will work.

 

[iboaterlurker5]

A suggestion is to call the tech line at ARCO marine in Florida, they may be able to tell you which of their products will work.

Great people, found a cross referenced one from my old one and direct replacement. Thank you

 

[Lou C]

wow that was fast, I have used them for both alternators and starters, they know their stuff.