Alternator problem

[Rodman]

My Alternator Gage was showing between 10 and 12 amps on the Gage on the dash. I replaced the Alternator today, its still showing the same thing. Any ideals ? ( Yes the Alternator was tested, it was bad)

[rossjo]

Marine alternator?

Did you get your new prop installed yet?

[Rodman]

Marine alternator?

Did you get your new prop installed yet?

Yes its a Marine Alternator, No I will be doing it this week, trying to work on the bottom side...

[ready123]

Could be the gauge... put a voltmeter on it to see....

[prowlersfish]

10 -12 amps ? or 10-12 volts ? if its amps there may be nothing wrong as it may need only to put out 10-12 amps at the time . If its volts then you may not be charging . did you rev it up to 1500-2000 rpm ? many marine alternators need to be rev up to start charging ( self excited ) .
this could cause it to test bad also at the store if their tester won't turn high enough rpm .

[rossjo]

Did it change suddenly? Was it 20Amps one day - and then 10 the next day?

[Rodman]

Did it change suddenly? Was it 20Amps one day - and then 10 the next day?

It just quit last time I took the boat out. I am going to get meter see if its charging or its the gauge.

[Rich Schwochow]

Check for an external voltage regulator I have one for each engine

[Rodman]

Check for an I have one for each engine

I did, The boat did not have one cause the alternator had one built in. The new one did not so I wired a external voltage regulator she started charging.

[prowlersfish]

What type of alt, did you install ?