BF90 overcharging...

[smokeonthewater]

I know there are a couple of you guys on here that eat sleep and breathe out boards...

I have a 2001 Honda bf90 that has started overcharging the battery. I'm getting 16 volts while running. Of course my first thought is voltage regulator but are there any common things I should be checking before I get into it. FYI this is a freshwater boat and always garage kept.
I did just put a new battery in it but had the problem w the old one too.