Took the boat out the other day for a ride, motors were running poor, looked down and I was at 9 -10ish volts. Luckily I had a spare battery that i tossed in and was able to get home just fine. After a little diagnostic work i noticed that both alternators were dead.

What could possibly kill both alternators? could it be a short or power loss somewhere? Batteries are not losing voltage when switch is left on so I am guessing there is no short but who knows.

I found the alternators I need on amazon part number 821663a1 for 80 bucks which is a quarter the price I got quoted from a merc dealer. I just don't want to put these things in to have them blow up again.