Alarm and voltage dropped to zero?

Discussion in 'Announcements & FAQs' started by Coop411, Nov 14, 2015.

  1. Coop411

    Coop411 New Member

    4
    Nov 3, 2015
    Clearwater, FL
    2005 Searay Sundancer 320
    Last boat 2004 Meridian 411
    Twin Mercruiser 350
    V drives
    Last night alarm sounded and noticed the starboard engine voltage was zero. Temp, oil pressure all good. Shut down engine and alarm stopped. Started engine a little later (with other battery) and all was fine for awhile with voltage up at 14 volts. Then happened again. The alternator is only 9 months old. Going out to check today. Is it possilble battery was just very low due to charger problem or loose connection? Appreciate any insight. Thanks,
     
  2. Fastphil

    Fastphil New Member

    24
    Nov 5, 2015
    Ct
    2004 420 DA w/Hardtop, Blue hull.
    "BIG DADDY 2"
    Cummings
    Could be a few things. It may be a defective alt or shorted internally. Alt belt could be slipping or the battery is not taking a charge. If I was gonna guess, alt failed again. That would be the reason it was at 0 then 14. Internal diodes are switching on n off. Most aftermarket alts like Arco or Sierra have a 12 month wty
     
  3. Coop411

    Coop411 New Member

    4
    Nov 3, 2015
    Clearwater, FL
    2005 Searay Sundancer 320
    Last boat 2004 Meridian 411
    Twin Mercruiser 350
    V drives
    Thanks for response. I have been traveling and failed to respond to you. I checked and it was the alternator. Disappointing as it is about 7 months old. Thanks again for response.
     

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