new alternator overcharging

Discussion in 'Sport Boats' started by Roy Burrill, Jul 10, 2020.

  1. Roy Burrill

    Roy Burrill New Member

    5
    Jul 2, 2020
    97 sea ray 280 sun sport
    Twin mercs 7.5 350 hp
    I have a pair of 97 merc cruiser 5.7 LX/V8, i had an issue with my alternator, it was over charging on the gauges, it also sounded like marbles spinning around inside. Got a new alternator and for about 2 minutes it was charging normal just between 12 and 14 amp then it pins to 16 . the other gauge is charging normal...any reason why this is happening??
    thank you
     
  2. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    how many wires and what color for the output post
     
  3. Roy Burrill

    Roy Burrill New Member

    5
    Jul 2, 2020
    97 sea ray 280 sun sport
    Twin mercs 7.5 350 hp
    The picture shows the wires for this alternator
     

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  4. Roy Burrill

    Roy Burrill New Member

    5
    Jul 2, 2020
    97 sea ray 280 sun sport
    Twin mercs 7.5 350 hp
    [​IMG]
     

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