Weird no-start issue....

Discussion in 'Electrical Stuff' started by CliffA, Nov 6, 2019.

  1. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    GATORB8 likes this.
  2. CliffA

    CliffA Well-Known Member GOLD Sponsor

    Dec 29, 2009
    Lake Norman, NC
    2001 Sea Ray 340DA
    Name: 'Happy Place'
    4.5kW West. Generator
    Purchased Nov. 2014
    Fresh Water Use
    Twin Merc. 6.2L (MPI)
    640 hp (Total)
    Raw Water Cooled
    V-Drive Transmissions
    Thanks....I have a load tester like that.... I'll add that to the list....
    cliff
     
  3. GATORB8

    GATORB8 Member

    58
    Jul 17, 2017
    Mountain Island Lake, NC
    2017 19 SPX
    4.3L 220 HP w/ Alpha 1
    So, rereading your original post, I realized I was relying too much on the 290 schematic in my previous post.

    I finally found the diagrams for yours, page 43 here: https://s3.amazonaws.com/srweb-pvt-prod-us-east-1-294962523550/static/owners-manuals/2003_340 Sundancer_1999-2003_340 Sundancer.pdf
    upload_2019-11-7_8-14-32.png
    So, you have latching solenoids in lieu of switches, but it still appears to be wired similarly, other than the generator having it's own battery. The power runs to the starters (and their solenoids) are run directly from the latching solenoids.

    I wonder if you have a bad new Port battery, one bad could be draining the second since they are paralleled. Or, you could have a drain that is pulling down the bank while you're waiting. Those would also explain your blower issue if they are on the house circuit.
     
    Last edited: Nov 7, 2019
  4. CliffA

    CliffA Well-Known Member GOLD Sponsor

    Dec 29, 2009
    Lake Norman, NC
    2001 Sea Ray 340DA
    Name: 'Happy Place'
    4.5kW West. Generator
    Purchased Nov. 2014
    Fresh Water Use
    Twin Merc. 6.2L (MPI)
    640 hp (Total)
    Raw Water Cooled
    V-Drive Transmissions
    Thanks again....can you tell from the diagram if the starter slave solenoids are by-passed when the emergency start circuit is used?....I am wondering if the slave solenoid could be bad....this is actually a fairly common problem for this era engine....it is easy to test by simply using a screw driver to jump the terminals of the slave solenoid...
    cliff
     
  5. GATORB8

    GATORB8 Member

    58
    Jul 17, 2017
    Mountain Island Lake, NC
    2017 19 SPX
    4.3L 220 HP w/ Alpha 1
    It doesn't appear that the slave solenoid is identified separately from the starter.
     
  6. Korkie

    Korkie Active Member GOLD Sponsor

    602
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
  7. CliffA

    CliffA Well-Known Member GOLD Sponsor

    Dec 29, 2009
    Lake Norman, NC
    2001 Sea Ray 340DA
    Name: 'Happy Place'
    4.5kW West. Generator
    Purchased Nov. 2014
    Fresh Water Use
    Twin Merc. 6.2L (MPI)
    640 hp (Total)
    Raw Water Cooled
    V-Drive Transmissions
    Thanks.....
     
  8. CliffA

    CliffA Well-Known Member GOLD Sponsor

    Dec 29, 2009
    Lake Norman, NC
    2001 Sea Ray 340DA
    Name: 'Happy Place'
    4.5kW West. Generator
    Purchased Nov. 2014
    Fresh Water Use
    Twin Merc. 6.2L (MPI)
    640 hp (Total)
    Raw Water Cooled
    V-Drive Transmissions
    Well the mystery is solved...let me say that no one is laughing harder than me at this...I just have to completely embarras myself so the you guys can get a good laugh too.....:p...

    After some additional trouble shooting this WE I decided to remove the cables from the battery and peel back the insulation a couple inches to see if there was any corrosion that was hiding under the insulation that would cause a bad connection to the battery...

    When I removed the negative cable I made an interesting discovery...I had failed to remove the plastic cap off the negative battery post on the new starboard engine battery and put the cable clamp right over top of the cap...:eek:.....once the cable clamp was installed correctly on the battery post all is well....

    Go ahead and take your shots at me....they are well deserved....:)..
    cliff
     
    Tacoma290 and Chris-380 like this.
  9. techmitch

    techmitch Well-Known Member GOLD Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    Yea, you should probably remove this post before I quote it... Woops.
     
  10. techmitch

    techmitch Well-Known Member GOLD Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    I replaced all of the batteries a week ago...one group 27 deep cell for the port engine, one group 27 deep cell for the generator, and two group 31 in series for the starboard engine and house bank...I was running short on time so I did not attempt to start the engines that day...

    Herein lies the direction of the root cause; "I was running short on time so I did not attempt to start the engines that day..."

    So glad you got it figured out, love that era 340"s
     
  11. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    That is awesome. I can honestly say I’ve never heard this one before! Ha. Glad it was a cheap fix for you
     
  12. Korkie

    Korkie Active Member GOLD Sponsor

    602
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags
    Bravo III Drives
    Amazing something so simple can bring out such complex issues to investigate. Glad to hear you found it.
     
  13. bbwhitejr

    bbwhitejr Well-Known Member

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    Cheap fixes are the best and we all deserve one now and then...

    Bennett
     
  14. BillK2632

    BillK2632 Well-Known Member GOLD Sponsor

    Jun 25, 2009
    Lake Norman, NC
    1999 185 Bowrider,
    Mercruiser 4.3, Alpha I
    That’s going to be with you for awhile - nice “senior moment”. But you know these new fancy batteries can be complicated.
     
  15. Tacoma290

    Tacoma290 Member SILVER Sponsor

    182
    Oct 5, 2006
    Tacoma, WA
    340 Sundancer 2007
    Twin 8.1S V-drives

    Up for Sale:
    290 Sundancer 2000
    Twin 5.0L EFI Bravo Drives
    Weird no-start is truly an appropriate description... Glad you let us know. Who here hasn't committed a mechanical gaff?
     
  16. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    I'd say Cliff's oops is more defensible than the time I spent, I mean, someone I know spent 20 minutes in the engine room trouble shooting a non-starting engine that happened to be in gear. And not "just slightly" in gear, she was in full forward. And of course we had guests aboard who were also boaters. That made for a good laugh...
     

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