Originally Posted by JoeQ
Thanks for the response. There isn't a separate alternator for battery charging. I'll check with a volt meter as you suggested the next time I'm aboard.
As for welding, yes. There was a contractor who attempted to weld the exhausts on the main engines. Would this have caused a problem?
Ok, It's one of these things that winds up and then charges the battery, does the alternator also provide the starter service? I have only seen 1 or 2 of these Onan sets and it was more than 20 yrs ago so my memory is a bit vague.
Electric Welding may well be the root cause of your problems, the side effect of welding with non isolated alternators is often to blow the diodes.
You might save yourself a lot of grief and trouble if you get a competent electrician to have a look at it for you.
I have had a bit of a look at a couple of sites to see if anyone has manuals etc. I see you have posted this same question in a few other places. Hopefully someone who can help you out with that will read your post.
Good Luck in finding a speedy solution.