Kohler 5ECD Not Running EC62, UU, UF

Evacuate as much of the water as possible with a wet dry vac using a hose small enough to fit in the inlet and inserted in to the vac hose.
Then fill with CLR and let sit for 24 hrs?
Followed by snaking if it can be angled to make the turn?
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...

 
Unnecessary, my friend...although you had the right idea for sure.

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

View attachment 111523

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...

Well that is fantastic and thanks for sharing the solution to your problem.
 
Well that is fantastic and thanks for sharing the solution to your problem.
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.
 
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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
 
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
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.
 
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.
 
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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.
 
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.
 
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.
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. :)
 
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.

View attachment 111576

This thread should be in the Internet hall of fame. :)
The scuba divers have to wait for somebody else to throw something overboard…
 
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
 
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
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.
 
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 ?
 
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 ?
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.
 
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.
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?
 

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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?
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.
 
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.
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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