Electrical System Overload

Discussion in 'Ask a Sea Ray Employee...(No Longer Active)' started by steinwmj, Jun 26, 2009.

  1. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    I have a 240SD. Was out on the lake and loss power (similar to turnng off the run switch). Batteries switch is turned to off position and the Power Trim still works. All gages are frozen and there is no electrical to the rest of the boat when battery switch is turned to on position. Pushed "Reset" button but power is not restored. Any ideas where to start looking.
     
  2. fc3

    fc3 Just another eclectic geek TECHNICAL Contributor

    Nov 12, 2006
    Northern NJ
    1999 Sea Ray 330DA
    Twin 7.4 MPI (310 propshaft HP) V-drives
    Twin Mercury Marine marinized 7.4L L-29 V8s
    Cast iron block w 4-bolt mains
    Bad fuse or fusible link. They're mounted to the battery cable terminal on the starter. Fuse is a block mounted to the terminal with a wire connected to it. Fusible links are wires attached to the battery terminal and crimp connected to the wiring harness. You need a voltmeter to test the fuses. Fusible links can be tested by pulling on them. If one feel rubbery and stretches then it's bad. The wire burned out leaving just the insulation. Links are color coded for current capacity, get one the same color when replacing
     
  3. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Thanks, I will check it out. Got to figure how to get down to the starter (not much room). Would a bad or low battery cause this problem while the engine is running? Also while checking fuses, noticed that the fuse box is very loose, so thinking that maybe this cause an short or something - just a guess.
     
  4. fc3

    fc3 Just another eclectic geek TECHNICAL Contributor

    Nov 12, 2006
    Northern NJ
    1999 Sea Ray 330DA
    Twin 7.4 MPI (310 propshaft HP) V-drives
    Twin Mercury Marine marinized 7.4L L-29 V8s
    Cast iron block w 4-bolt mains
    If the battery was dead, then the power trim would not work. Check the battery voltage, but the trim pump draws a lot of current. I doubt that that would work and nothing else.
     
  5. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Both batteries at 12V. Power trim works on either battery, and when the battery switch is turned to the off position. Not sure what the best way to get to the fuse on the starter is. Do you know if this is something that has to go to the dealer?
     
  6. fc3

    fc3 Just another eclectic geek TECHNICAL Contributor

    Nov 12, 2006
    Northern NJ
    1999 Sea Ray 330DA
    Twin 7.4 MPI (310 propshaft HP) V-drives
    Twin Mercury Marine marinized 7.4L L-29 V8s
    Cast iron block w 4-bolt mains
    Pretty trivial. Depends on what you are comfortable doing.
     
  7. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    Did you check the breaker back by the battery? When tripped, a little black arm swings out. I know that if it trips it will cut power to the dash, but not sure if it affects trim pump.
     
  8. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Thanks, I will look to see if the 240SD has one back by the batteries.
     
  9. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    There is no battery breaker on the 240SD.I checked as many fuses as I could except the 90amp fuse at the starter. I'm not sure how to get to it - there seems to be no room or I will have to lay on top of the engine and hang down to the starter but I am not sure if that is best to do. I am sure a tech knows how to do it easily.
     
  10. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    It's not a 240SD thing - things change from year to year. I was just taking a guess that you had a newer 240SD as I didn't see the year listed in your original post. I don't recall when SR started using this breaker, but are you positive? It would definitely be somewhere under that port-side seat where the batteries are. It could be mounted on the floor or the hull side. Looks something like this: http://bluesea.com/category/3/10/productline/overview/150

    I think you pretty much got it figured out how to get to your starter - there's really no trick involved. Any way you can get to it will work.
     
    Last edited: Jun 27, 2009
  11. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Thanks for the suggestion though. I looked again and there is nothing like this on the boat. I will take a try at it myself, but also call the dealer on Monday to see what's involved with them doing it. Thanks
     
  12. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    I changed the 90 Amp Fuse, connected batteries and when I turned the switch to one of the batteries I heard a pop down by the starter/fuse and I have no power to the instrument panel. Any ideas what could be happening? Maybe bad batteries?

    Mike
     
  13. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Problem resolved. It was the orange wire from the 90amp fuse to the alternator. It rubbed against a bolt wearing down the insulation. I was surprised that only about 1/3 of the actual wire was left. Had to splice-in a marine grade (water proof) butt connector and wrap with conveluted tubing. Installed new fuse and all electronics back. Found out that there was a Mecury Marine Service Bulletin issued. Thanks to all who helped.:smt038
     
  14. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor

    Apr 21, 2009
    PA
    Various
    Various
    Glad you got it figured out! :smt038

    Hopefully you're having better weather out there than we are.
     
  15. steinwmj

    steinwmj New Member

    15
    Jun 26, 2009
    Simi Valley, CA
    Weather is great in So Ca. Haven't had the boat out in a few weeks, so this week taking some time off to enjoy the sunshine with the family.
     
    Last edited: Aug 2, 2009
  16. FLWestCoast

    FLWestCoast Member

    34
    May 3, 2021
    Tampa Bay
    240 Sea Ray Sundeck 2005
    Mercruiser 350 Mag MPI
    Almost 11 years later I am faced with same scenario - 90A fuse blown that is mounted to the starter. I have no idea how one might get to it without removing a number of components.

    I am very impressed that the younger you managed to change that out!
    @steinemj
     

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