Low voltage

caik01caik01 Posts: 13Member
We were recently out on the water and stopped to swim, shutting off both motors. When we went to leave only the port motor would start. We tried to jump the starboard motor with a jump back and had no success so we called boat us and they tried to jump it and still nothing so we got towed in. We replaced all 4 batteries on the boat and are still getting low volts around 11 when at the dock on shore power. Even our VHF radio alarms low battery with the new batteries. Any ideas why we are getting such low voltage?

Comments

  • skennellyskennelly ChicagoPosts: 624Member ✭✭✭
    Sounds a lot like what a bad ground would do.

    Also check connections going to the switch, isolator ect...
    2002 - 270FV Mag 350 B3
  • caik01caik01 Posts: 13Member
    a bad ground to what? the alternator?
  • icoulthaicoultha Niskayuna NYPosts: 381Member ✭✭✭
    You should have a common ground point that comes form your batteries, perhaps it has bad connections. Where’s the 11V - at the battery or off the dash meter?

    Regards,

    Ian

  • caik01caik01 Posts: 13Member
    dash meter
  • icoulthaicoultha Niskayuna NYPosts: 381Member ✭✭✭
    Check with a meter on the batteries, measure and record each. If still at 11, disconnect shore power and start up, see if they get to near14V. If so then it sounds like your charger could be a problem and/or the grounding.

    Regards,

    Ian

  • caik01caik01 Posts: 13Member

    thank you, I will try that

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