Lost all power to boat-where are the fuses?

Discussion in 'General Maintenance/Repair Questions' started by Leardriver, Sep 2, 2019.

  1. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    2004 270 Sundeck 8.1, accidentally touched the wrong battery cables together when installing a new battery. Stone dead at ignition switch and resettable circuit breaker next to engine ECM.

    I hear of a fuse on the starter, which is virtually impossible to reach, and a 15 amp ignition fuse on the purple wire.
    Any idea where that purple wire ignition fuse is? The little fuse box in front of the helm is dead, and if I solve the other problems, I suspect I will get that back.

    The Perko switch is sending good power to the big battery cable going to the starter, but I can't reach any of the other wires around there. I'm going to build a 12 inch probe extension.

    Of course, I have a trip to Lake Powell in a day, with people flying in from Maine and Illinois.
     
  2. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    take a jumper from the + battery and try connecting it to the alt orange output post. If you have a fuse at the starter this will bypass it and allow you to start the motor
     
  3. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    Thanks for the response. The 90 amp fuse on the starter was cooked. The fact that it did it's job is great.
    How you guys get to those parts is worthy of a Nobel prize.

    I found an old post of your that said that the alternator is likely to be cooked also. The key was off, don't know if that matters. If I have to replace it, so be it. A penalty for carelessness.
     
  4. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    if anything you just took out the diodes or the fuse blew before you took out the diodes. The reason everything went dead is because your main power is connected to that fuse. But upstream from that fuse is a 50A circuit breaker. I put the main power directly to the starters battery post ,your still protected by the circuit breaker and use a maxi-fuse in place of the oem one. A lot easier to replace
     
  5. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    Disaster has struck. While replacing the 90 amp fuse on the starter, the solenoid terminal broke off. Looks like weakened plastic from heat cycles. I can't get to the starter to remove it. There's a monstrous 8.1 road block in the way.
    Any tip on getting to a starter when you can't reach it?
     
  6. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    IMG_4230.JPG
    You may want to hire someone who knows about these things. That would be my tip.
     
  7. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    I am not against that. I know about these things, I could change a starter on an engine stand in 1 minute. But, my oldness, fatness, and lack of long arms are all going to be impediments to reaching that reclusive starter.
     
  8. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    That is the problem. remove exhaust or pull engine . Def. no joke.
     
  9. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    I think they install the starters and the water pumps (at least the v-Drive water pumps) on big block small boats right after they pop the hull out of the mold, and then start putting the rest of the boat on top of those parts.

    I am going to put a hidden camera on my boat the next time I pay to have engine work done. I know that they have skinny elves that do that work and once winter comes they head to the north pole to work for Santa.

    Sorry, that is no help, but I have left too much of my skin and scalp scraped on various parts in the bilge to ever attempt a starter replacement.
     
  10. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    Starter replaced, along with 90 amp fuse attached to it. Hard part to reach. Boat runs perfectly, charging well, so the alternator survived the assassination attempt. The old starter was literally crumbling and corroding away. I am still not convinced that OEM parts are any more durable or worth a penny more.
     

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    Zim and Chris-380 like this.
  11. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Try some aftermarket Chinese crap and report back :p
     
  12. Bt Doctur

    Bt Doctur Well-Known Member

    Aug 21, 2010
    New Jersey
    Ex SRV 240 Weekender twin
    in between
    and just where do you think oem parts come from, the USA?
     
  13. Leardriver

    Leardriver Active Member

    202
    May 24, 2016
    Denver, CO
    2004 270 Sundeck 8.1 Bravo III
    5.0, 5.7, 6.2 8.1 Bravo III over the years
    Roger that. Almost all parts are made in China. I bought the starter from a company in Detroit called Michigan rebuilders, and still got a Chinese part. My Mercedes and BMW are full of Chinese parts, and my wife's new '18 Accord is also.
     
  14. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx
    502 mpi Bravo 1
    Well let me say , there's a huge difference in quality between OEM and say a Chinese parts peddler like DB Electrical.
     
    Zim likes this.

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