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Dec 30th, 2023
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 250 Merc XPS alternator
#10005373
05/22/14 09:46 PM
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Joined: Aug 2007
Posts: 96
numbersguy
OP
Outdoorsman
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OP
Outdoorsman
Joined: Aug 2007
Posts: 96 |
Is there an easy way to determine if the alternator is putting out the correct voltage? I'm not sure if the smart gauges are reading the battery voltage or the alternator voltage. I would guess the battery voltage but not sure.
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Re: 250 Merc XPS alternator
[Re: numbersguy]
#10005999
05/23/14 01:56 AM
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Joined: Nov 2008
Posts: 3,356
jimmye123
TFF Team Angler
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TFF Team Angler
Joined: Nov 2008
Posts: 3,356 |
what does it read??? anything over 12.6 something is working, mine at idle is 13+
Fun-N-Sun Metro Director
06 Legend le21
Fast cars, fast boats,
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Re: 250 Merc XPS alternator
[Re: numbersguy]
#10007126
05/23/14 02:25 PM
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Joined: Aug 2007
Posts: 96
numbersguy
OP
Outdoorsman
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OP
Outdoorsman
Joined: Aug 2007
Posts: 96 |
The smart gauge reads from 12.8 to 14 depending on the RPM's of the motor. My problem is that I'm running my starting battery down on occasions when I am run my livewells all day. The way the new boats are wired everything runs off of the cranking battery. Lights, depth finders, livewells, power poles, etc. and I have ran my cranking battery down on a couple of occasions. The battery is a new platium die hard so I'm pretty sure that's not the problem.
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Re: 250 Merc XPS alternator
[Re: numbersguy]
#10008329
05/23/14 09:16 PM
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Joined: Jul 2007
Posts: 7,154
opus
TFF Celebrity
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TFF Celebrity
Joined: Jul 2007
Posts: 7,154 |
Have battery checked if good need BIGGER BATTERY OR LESS STUFF USING JUICE
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Re: 250 Merc XPS alternator
[Re: numbersguy]
#10008482
05/23/14 10:39 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Not uncommon. Watch the voltage most fish finders will show it. You need to start your big motor and let run when cranking battery gets below 11.8 volts. Have a customer that runs all you have plus Sirius.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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