Hi all. I have a '78 85hp Evinrude (85899c) that seems to be overcharging the battery. I have a volt meter in my boat and the last time I was on the water I noticed that it was reading 16 volts at any rpm above 2000. I changed the rectifier (it tested marginal) and it seemed to help but after running on plane for awhile the volt meter slowly creeped back up to about 16V. I doubled checked the guage and it is fine. So, I guess my questions are:
1. IS this normal? Best I can recall is that my motor would charge to about 14V, not 16.
2. Any suggestions on how to troubleshoot this. I can find information on troubleshooting a low or no charge condition but over charging seems to be nonexistant.
I am a mechanic by trade and just got an Evinrude Service manual for this motor (but again it doesnt list over charging) so I am looking for any hints or past experiences that might save me some time and money.