Starb. engine no start (2007 Bayliner 325)

Discussion in 'Electronics Q&A' started by griff4, Oct 8, 2018.

  1. griff4

    griff4 Member

    107
    Mar 19, 2013
    Saint Pete Beach, FL
    2007 Bayliner 325
    2 350's w/Bravo II drives
    For the last few months, my sb 350 carbed. engine starter had a strange noise on starting.i also noticed that the starb starting battery wea very low on electrolite. I changed the battery with new. Now the starter is inoperative and there is no alarm sound when the ignition is turned on. Prior to this starting failure I noticed excessive charging rate on the volt gauge. I suspect the starter and/or the 90 amp starter fuse are toast. Your expert opinion is appreciated.
     
  2. griff4

    griff4 Member

    107
    Mar 19, 2013
    Saint Pete Beach, FL
    2007 Bayliner 325
    2 350's w/Bravo II drives
    Checked further today. The 90 amp fuse on the starter is visibly burnt. I ordered a starter and a 90 amp fuse today. What would cause my dashboard volt meter to show around 16 volts at 3500 rpm. usually these motors show around 11 1/2 volts at 3500 rpm's and cruising. All is bone stock and I bought this boat new 10 years ago.
     
  3. Espos4

    Espos4 Active Member

    514
    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Whether it’s 11.5 volts or 16 volts at 2500 rpm, both are a problem.
    Weak batteries, low electrolyte,
    Rusty or corroded ground connections, loose belts......
    Check and correct all of those first.
    If it still persists, I would suspect a faulty voltage regulator. Time for a new alternator.
     
  4. griff4

    griff4 Member

    107
    Mar 19, 2013
    Saint Pete Beach, FL
    2007 Bayliner 325
    2 350's w/Bravo II drives
    Okay, Espos. I am going to replace the starter and it's 90 amp fuse. When it does start, I will check the alternator output and change it if needed. I do have the Merc service manual #31 which is for the 250 hp 350 cid carbed engine. Thanks for your advice.
     

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