Rectifier over charge?

[GoogieMan]

I have a 1991 yamaha 140ceto i put multimeter accross my battery to check to see if its charging as my battery's are getting flatter quicker.
the reading starts from 13.4 and slowly rise's to 16.2 afer about 30 or so seconds and thats were it stays.
it has a dual battery system but only had one battery connected and it only switched to one battery could that be causing a problem or the Rectifier has crapped out?

 

[RickJ6956]

Re: Rectifier over charge?

Not the rectifier. That converts AC to DC.

Could be a bad voltage regulator, but you should test it with a load. Turn on a blower and lights. First check the cabling to make sure you have no corrosion and everything's tight on both the positive and negative sides.

 

[GoogieMan]

Re: Rectifier over charge?

rectifyer/reg all one unit (6G5-81960-A0-00) terminals new cables new battery's are just about wrecked due to this i think, they dont hold there charge.

would be wise to replace?

 

[RickJ6956]

Re: Rectifier over charge?

Sorry if my first response seemed condescending.

A bad v-reg could indeed overcharge and shorten the life of the battery.

If the v-reg has a bad or loose ground it could raise the voltage. I would make sure before I spent the money to replace it.

However, a quick 'net search shows that 16.2 volts is a common sign that the v-reg has gone bad.