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89 mid cabin alternator and belt size

Posted: Tue Apr 02, 2024 1:45 am
by mrrudely
replacing starboard alternator
it is a one wire
does anyone have a part number?
I found mando 39200
prestolite 39064
Motorola MR

also current belt size is 47 5/8" which seems a bit long

thx

rr

Re: 89 mid cabin alternator and belt size

Posted: Tue Apr 02, 2024 5:53 am
by prowlersfish
Any photo of your Alt? Beacon Marine has some

https://www.trojanboats.net/zencart/ind ... th=102_110

Re: 89 mid cabin alternator and belt size

Posted: Thu Apr 04, 2024 8:12 am
by Scott67
mrrudely wrote: Tue Apr 02, 2024 1:45 am replacing starboard alternator
it is a one wire
does anyone have a part number?
I found mando 39200
prestolite 39064
Motorola MR

also current belt size is 47 5/8" which seems a bit long

thx

rr
Assuming your engine serial number is greater than 88710, the alternator numbers you quoted are correct and my recommended replacement would be an Arco 60104, $191.59 through Amazon.

Regarding the belt size, again assuming serial number greater than 88710, the correct belt part number is Crusader #98210

Re: 89 mid cabin alternator and belt size

Posted: Fri Apr 05, 2024 8:07 pm
by mrrudely
thanks guys
serial number is 76868
I bought a DB Electric from Amazon
Looks like it will work, I'll Let you know if it doesn't.
As for the belt, that crusader number gives me a spec of 49 1/8" which is too long.
I will use the old belt as a guide.

rr