Kohler 5ECD Not Running EC62, UU, UF

Discussion in 'Electrical Stuff' started by pyro, Apr 15, 2019.

  1. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Unnecessary, my friend...although you had the right idea for sure.

    Meet my new best friend... (reco from the plumbing guy at Fisheries)

    20210902_192444514_iOS.jpg

    I pulled the raw water hose off the genset side of the sea strainer and pushed it into the bottom of this bottle and started the genset up with a bucket at the end of the tailpipe. One gallon and it was all cleared out. Sucked the first half gallon down (likely filling all the lines) and then was clearly hung up as the liquid level didn't move...but about 30 seconds after that, the rest of it was sucked down. Hooked the water and exhaust lines back up and ran the genset with raw water...

     
    Tacoma290 likes this.
  2. Wanderer 290

    Wanderer 290 Well-Known Member

    730
    Jul 1, 2019
    Traverse City
    01 sea ray 290 sundancer
    Twin 5.7 b3’s
    Well that is fantastic and thanks for sharing the solution to your problem.
     
    Atalla likes this.
  3. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    For real...although I have a new problem with the genny switch in the salon but I'm going to move to a different thread for that as it matches something another member posted a couple weeks ago. It doesn't affect genset operation, just a weird switch behavior.

    Super happy to have my genset back so mooring buoys and dropping anchor are back in play. Appreciate this group.
     
    Last edited: Sep 2, 2021
  4. Stray Current

    Stray Current Well-Known Member

    408
    Oct 27, 2019
    The F*** outta New Jersczystan, made it to Florida
    2007 260DA
    6.2 Horizon MPI/BravoIII
    Kohler 5ECD
    I’d put a bilge pump in a bucket or pan under that tailpipe and recirculating that fluid through the exchanger and exhaust for a few hours. That’s still a little light on water flow

    that’s how I flushed my engine exchanger and the byproduct was death soup and hold 165-167 even sucking 92 degree gulf water where it used to creep to 175 at 4100 in 85 degree water
     
  5. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    I appreciate the recco. I may get to that in the next few weeks just to be sure. I’m in WA lakes and the Puget Sound so water is cold as hell pretty much year round which is probably why I could still run this thing despite the blockage.
     
  6. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Okay, @Stray Current, you win. :D

    I'll take an after photo so we can see how much junk was left in there.

     
  7. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Well, shit.

    Now the Genset won’t even start. Throwing an Overcrank code. Tried to turnover. Gets about one turn and just seizes up. I didn’t do one thing other than circulate the descaler through the raw water side. Didn’t touch anything else. And now it’s dead.

    I really do hate this thing.
     
    Last edited: Sep 3, 2021
  8. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Here's where I am now...first video showing where water is leaking out of the genset while running fresh water through the raw water inlet and the second showing what happens when I try to start it. It would seem that in an attempt to flush the system, I busted a seal of some sort.





    This thing is about to become a scuba diving attraction.
     
  9. Wanderer 290

    Wanderer 290 Well-Known Member

    730
    Jul 1, 2019
    Traverse City
    01 sea ray 290 sundancer
    Twin 5.7 b3’s
    While pumping descaled through the raw water system was the genny running?

    If the genny was not running the exhaust system may be full and even some backed up into a cylinder causing hydro lock.
    Pull the plugs and turn over the engine watching for liquid to be expelled.

    If all is well disconnect the battery to reset the electronic controls.
     
  10. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    You folks are soooooo smart. ;-) Indeed flooded. All is well now, genset running smoothly.

    Here is the fluid after 2 hours of recirculation. The original picture in post #186.

    20210903_192801323_iOS.jpg

    This thread should be in the Internet hall of fame. :)
     
  11. Wanderer 290

    Wanderer 290 Well-Known Member

    730
    Jul 1, 2019
    Traverse City
    01 sea ray 290 sundancer
    Twin 5.7 b3’s
    The scuba divers have to wait for somebody else to throw something overboard…
     
    Atalla likes this.
  12. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Indeed. Can’t be sure who or when, but I think we can be certain it will be a marine generator.
     
    Wanderer 290 likes this.
  13. Stray Current

    Stray Current Well-Known Member

    408
    Oct 27, 2019
    The F*** outta New Jersczystan, made it to Florida
    2007 260DA
    6.2 Horizon MPI/BravoIII
    Kohler 5ECD
    That hydrolocked on you? The way that exhaust is designed it should not be able to flow back up into the cylinder like that.


    Any more water discharge out the exhaust now that she's up and rolling?


    I call mine Little Satan because it generates as much evil as it does electricity
     
  14. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    Once I got her back up and running, there was no errant water and everything seemed 100%. I am confused as to how the water ended up back flowing inside just looking at the geometry of it, but it it happened. All is copasetic now.

    I would say it is about the same before the flush and after. Maybe a little more water flow out the exhaust, but not much.
     
  15. Chris Crownover

    Chris Crownover Member

    77
    Apr 22, 2019
    Seattle, Washington (Lake Union)
    Searay 340 Sundancer
    Mercruiser Sterndrives 740 hp
    Kohler 5ECD
    Hi All, I’ve been reading all your post, it is clear we truly hate the Kohler 5ECD!!

    Im getting a LOC code.

    1.) I removed and replaced the old impeller and it was damaged.

    2.) Cleaned out seacock strainer

    3.) ran the gen with seawater inlet hose disconnected and blew out debris

    4.) I removed and cleaned the fuel injector and spark plug. I also bled the air out of the system. Replaced fuel filter

    it started running better and instead of cutting off immediately it would turn on after 10 sec

    5.) I decided to disconnect one of the elect lines going to the seawater pressure switch

    it worked perfectly but then I noticed the coolant overflow bottle filled up and it got a bit Smokey so I turned it off

    the two elect prongs going to the pressure switch are rusty

    what should I do next? Maybe the seawater pressure switch is bad, the prongs don’t have good connection, something else is clogged ?
     
  16. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    If your coolant overflow bottle is filling that fast, I’d bet your heat exchanger is junked up and not getting adequate raw water flow. Check out post #184, 186, and 190. Flushing the heat exchanger.
     
  17. Chris Crownover

    Chris Crownover Member

    77
    Apr 22, 2019
    Seattle, Washington (Lake Union)
    Searay 340 Sundancer
    Mercruiser Sterndrives 740 hp
    Kohler 5ECD
    Just to make sure I don’t screw this up…
    So I drain coolant and let port at 26 drain into bucket and remove short hose under HEX (#7) and install longer hose and circulate? Pour descaler in bucket to circulate?
     

    Attached Files:

  18. Atalla

    Atalla Active Member

    244
    Sep 1, 2020
    Seattle
    2007 38 Sundancer
    Twin Merc 8.1 S Horizon V-Drives
    No. You are going through the raw water system to clean out the heat exchanger. Into 20 and then out of 18. The bucket with the pump can just sit under the tail pipe at 18 and pump the descaled back into 20. Leave the coolant be. It’s the raw water meant to cool the coolant that is where I’m speculating you’re jammed up.
     
  19. douglee25

    douglee25 Well-Known Member

    Jan 13, 2008
    Dallas, TX
    Cruisers 3575
    Twin 7.4l
    Barnacle buster or similar diluted acid.
     
  20. Chris Crownover

    Chris Crownover Member

    77
    Apr 22, 2019
    Seattle, Washington (Lake Union)
    Searay 340 Sundancer
    Mercruiser Sterndrives 740 hp
    Kohler 5ECD
    So I connected to 20 with a 1600 gph pump and disconnected 18 so it could go in a bucket.

    Nothing is coming out of the exhaust :(
     

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