Merc won't charge battery?

[John Mickish]

I've got an 88 Merc 90hp three cylinder that dosen't charge the battery. Any quick easy things to look for or is the stator shot?

I've got a voltmeter hooked up to the battery to monitor the charge and it dosen't go up when running, it just stays around 12 volts and I charge it when I get home.

[tomfromblaine]

I dont know for sure but isnt there a voltage regulator of some type, if there is I would check that first but I would check with Val on this web site I think he has those mercs dialed in.

[Valv]

Stator is not the problem on this motor, you probably have a bad rectifier, which is what charges battery.

I wish I had one here with same setup, but mine is newer and I believe they changed type so I cannot show picture.

Send me serial # , I will lookup Mercury parts express and show you what is it.

It will be an expensive item, or if you can have a mechanic test it, it would be better.