Charging issue

[capecodder116]

Started the engine and Volt gauge on helm reads 12V usually reads around 14V....couple minutes later it's reading 14V....we go out fishing gauge is still around 14V (normal) shut the motor off, start up again same issue again...at this point we are underway, engine running at 2500 RPM and still showing 12V then it jumps up to the normal 14V after about 15 minutes of running time....

Next time it happened, I had my multi-meter with me and immediately checked the battery and it was showing 12V so was the volt gauge on the helm, then the multi-meter was showing around 14V and so was the Volt gauge on helm so figuring it's an alternator issue....

Thinking it's alternator and my question is, is the alternator rebuildable or do I need to purchase a new one...

Boat is a 1984 S-2 yacht 22' continental with 260 mercrusier engine....

 

[JustJason]

Re: Charging issue

should be able to get it rebuilt. Are you on the cape or inland? There's a good rebuild shop up near my way.

 

[KJSmitty]

Re: Charging issue

Check all of your battery and alternator connections.

I had a very similar issue and it ended up being a loose ground cable at the engine block, which in turn ruined the alternator/internal voltage regulator.

Good luck

 

[capecodder116]

Re: Charging issue

I live on the Cape....I'll check all the cable connections....thanks.

 

[abj87]

Re: Charging issue

This is not a one wire alt by any chance? They don't kick in till 2000 alt rpm.

 

[Robj]

Re: Charging issue

This is not a one wire alt by any chance? They don't kick in till 2000 alt rpm.

My one wire kicks in at about 1000 rpm, sometimes even at idle. My experience is that it is much cheaper to have it rebuilt than buying a new one.

Have a great day,

Rob.