BWCA Water discharge from kicker Boundary Waters Listening Point - General Discussion
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10/28/2019 09:23AM   (Thread Older Than 3 Years)

I'm thinking i had some spiders clog my discharge line. I've cleaned out the last 5" up to this component. What is this?
 
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Savage Voyageur
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10/29/2019 06:58PM  
Might be a device that uses water to cool your oil. What is you engine make and model and HP?
 
10/29/2019 07:47PM  
Could it be a pump? If so, there may be a rubber impeller in it that has failed. If has a check valve in it, i.e. not a pump, perhaps a chunk of something is preventing it from working. Best thing is to just remove the phillips head screws and take it apart. Doesn't seem that hard to do.

Tomster
 
10/30/2019 07:22AM  
Savage Voyageur: "Might be a device that uses water to cool your oil. What is you engine make and model and HP? "

2009 Merc 9.9 Bigfoot
Those are fuel lines on the right.
The water discharge comes off the bottom left.
What enters the top left on that brass fitting?
 
GeoFisher
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10/30/2019 10:15AM  
AmarilloJim: "
Savage Voyageur: "Might be a device that uses water to cool your oil. What is you engine make and model and HP? "

2009 Merc 9.9 Bigfoot
Those are fuel lines on the right.
The water discharge comes off the bottom left.
What enters the top left on that brass fitting?"


Air, from an air pump? Hose prob goes to the front, to a filter.......

My optimax looks similar.

Actually , after looking, prob not............that is very weird.......no idea :) :)

 
thegildedgopher
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10/30/2019 10:25AM  
99% sure that's your fuel pump, Jim -- and the top left hose would be vacuum?

Does this diagram help I think it's the right one at least. Shows the intake manifold and fuel pump.

 
DKalis
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10/30/2019 10:49AM  
thegildedgopher: "99% sure that's your fuel pump, Jim -- and the top left hose would be vacuum?

Does this diagram help I think it's the right one at least. Shows the intake manifold and fuel pump.

"


I second this. It looks like it is a mechanically driven diaphragm pump with fuel on one side and something else on the other side.
 
Savage Voyageur
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10/30/2019 11:00AM  
I found the same page as the other two guys but got interrupted so I couldn’t respond as soon. I agree with the others that it’s a fuel pump. Just follow the lines and you should be able to find where that line goes to. You can also google your engine Model and make and you can find a service, operator and parts manual online.
 
10/30/2019 01:09PM  
DKalis: "
thegildedgopher: "99% sure that's your fuel pump, Jim -- and the top left hose would be vacuum?


Does this diagram help I think it's the right one at least. Shows the intake manifold and fuel pump.


"



I second this. It looks like it is a mechanically driven diaphragm pump with fuel on one side and something else on the other side. "

That looks right. #23 is the water discharge line that goes to the pee hole. I think I have cleared that. What is #22? When I disconnect it there is no water coming out of it at all.
If that is the water discharge from my engine than I must have a blockage somewhere on the intake side.
 
thegildedgopher
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10/30/2019 02:05PM  
AmarilloJim: "
DKalis: "
thegildedgopher: "99% sure that's your fuel pump, Jim -- and the top left hose would be vacuum?



Does this diagram help I think it's the right one at least. Shows the intake manifold and fuel pump.



"




I second this. It looks like it is a mechanically driven diaphragm pump with fuel on one side and something else on the other side. "

That looks right. #23 is the water discharge line that goes to the pee hole. I think I have cleared that. What is #22? When I disconnect it there is no water coming out of it at all.
If that is the water discharge from my engine than I must have a blockage somewhere on the intake side."


Again, I think it's a vacuum line that makes the pump "go."

There is a pretty good explanation on this forum. In short -- the pump is not electric, it needs something to activate it. "...when the piston goes up in the cylinder it creates a vacuum in the crankcase and that vacuum pulls the pumps diaphram in which in turn sucks fuel from the fuel line into the pump chamber. Then as the piston goes back down it pressurizes the crankcase which pushes the diaphram back out (same direction the spring pushes). When the diaphram is pushed out by the crankcase pressure the fuel is then pushed out a fuel line and up to the carb(s) float bowl.

I do think you are on to something when you suggest your blockage may be way down in the water intake.

Otherwise -- is motor cooling itself OK? Have you checked the impeller / water pump?
 
thegildedgopher
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10/30/2019 08:08PM  
jim — I had some doubt as to whether that tube you’re saying runs to the peehole actually does so. Just because... why in the world would it run to or from the fuel pump, which has nothing to do with that system? I sent an email to a friend who is a savant when it comes to outboards (and airplanes) and he agreed. I’m going to paste his response below. I think you need to get into this a little more and find the true source of water for the pee home. Good luck!

“I doubt the water line is hooked in any way to the fuel pump,it may be an illusion as it runs just underneath the pump. the only possibility is that, if in fact it has a fourth line dumping overboard or teed in, the tell tale line would be there in case the diaphragm were to fail. In that case its simply a drain tube to keep the gas out of the engine compartment. This would be done to prevent an explosion if the gas were to be ignited.

I doubt that such a drain line would be hooked to the tell tale hose,the reason I doubt it is the water pressure would be acting against the diaphragm.”
 
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