We have shucked an alternator on our 43 DC. She has J&T 6-71TI's 390 HP. 12 volt system

Does any one know the part number and amperage output? The unit has NO visible outside markings. My son who works for NAPA and is the rep for alternators can't even identify it.

How about sources for rebuilt and or replacement? I am calling Sam's later today.

Any information would be helpful. According to my son this one is most likely not rebuild-able. The case is broken (go figure) and he said it looks like it was "under the boat" very corroded.

As always thanks for the help!!!!!!!!!!!!!!!!