Do I need a new alternator?

[Redflash316]

Hi, I have a 92 omc inboard 5.0. My stereo amp keeps shutting off at over 2k rpm and I put a meter on my battery and noticed my voltage shoot up to 16+V when I get the rpm around 2.5k. Battery is new so thinking it is probably the alternator or voltage regulator? Thoughts?

 

[alldodge]

With it going up to 16V I would say you may need a new ALT

Do check all the wires going to the ALT. If one of them is not connected correctly, or has a bad connection then the ALT may not be able to sense the voltage level and it will keep rising

 

[Redflash316]

Yea I think so too.....Any recommendation on where to get one? Does it have to be a marine, or can I go to a parts store and buy one ford a Ford 5.0?

 

[alldodge]

It has to be marine, while I don't know you, I don't want you or your guest to go boom

Would need to know which ALT you have now
Take some pics of it, or look for model number

 

[Redflash316]

Prestolite bem2004kb on the sticker attached to the alternator. I believe it's a 51 amp. I googled and found a couple that were suppose to be direct aftermarket replacement, one was made by Arco?

 

[Redflash316]

And thanks for the "not blowing up" part