1984 Motorola 788b alternator
New to forum and just bought my first Mastercraft 1984 SS. I took it out the other day and was going for a slow cruise and pulled up to the dock and was just idling and boat stopped. I tested the battery with boat off and it was about 12.4 and then started the boat again and it was 12.6 so I am thinking I need a new alternator.
I searched thru the forums and saw a couple of threads about similar issues but none mentioned which replacement alternator to get. I can not find a replacement for the Motorola 788b alternator when searching the internet.
any help would be appreciated. If you don't think it is the alternator also please let me know.