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Thread: Is it my charger?

  1. 08-10-2011, 07:19 PM #1
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    Default Is it my charger?


    I bought a new boat. The starting battery has been getting worse all the time. I charge it and it would go to 90% then 80% the other day it only went to 72% and the charger shut off and was flashing Bad telling me the battery was bad. I took it back to the dealer, he said he would have to test it, he said it just needed charged and that my charger was bad. I keep 5 batteries charged with this charger and never had a problem till this battery. Talked to him today, he said the battery was 100% and he would check it tomorrow to see if it held a charge. I did that for 2 days and it went back down to 10% not holding a charge. Any ideas or suggestions? I bought a new battery from him with the understanding that if the original was bad I would get my money back...


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  2. 08-10-2011, 08:36 PM #2
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    Is this a brand new boat? What motor? Does the battery go down just from sitting or does it go down while you are running the motor?
    Fair Winds and Following Seas

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  3. 08-10-2011, 09:19 PM #3
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    i would isolate the battery and use a different charger on it..........then test it....
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  4. 08-10-2011, 09:29 PM #4
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    Quote Originally Posted by chucktx View Post
    i would isolate the battery and use a different charger on it..........then test it....
    x 2
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  5. 08-11-2011, 05:35 AM #5
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    Quote Originally Posted by Barnacle Bill View Post
    Is this a brand new boat? What motor? Does the battery go down just from sitting or does it go down while you are running the motor?
    It's a new 2009/30hp Merc 4 stroke. I took it out of the boat and charged it twice. It went back down both times just sitting there.


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  6. 08-11-2011, 05:48 AM #6
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    get a hydrometer and test each cell, may have a bad cell(s)
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    I meant to behave, but there were just way too many other options available at the time.
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  7. 08-11-2011, 06:06 AM #7
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    Sealed battery.


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  8. 08-11-2011, 07:54 AM #8
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    Quote Originally Posted by Crappie 1 View Post
    It's a new 2009/30hp Merc 4 stroke. I took it out of the boat and charged it twice. It went back down both times just sitting there.
    Its a bad battery. A load test at your local auto parts store would confirm this.
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  9. 08-11-2011, 10:08 AM #9
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    Yep.. Bad battery.

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  10. 08-11-2011, 01:58 PM #10
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    Well, I did that too, and it tested ok, they said it needed charging. I'm waiting for a call from the dealer. Both times it tested 10 amps and it should be at least 12 or more...


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