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New Impeller Didn't Work - Still No Water Thru Tell Tale. Help

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New Impeller Didn't Work - Still No Water Thru Tell Tale. Help

Old 03-23-2019, 07:48 AM
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Yes, the muffs have always worked fine.
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Old 03-23-2019, 07:51 AM
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Was it pumping fine prior to the impeller replacement?

If so, then would seem like impeller is the problem, or installation, or something has lodged northward ...
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Old 03-23-2019, 08:26 AM
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Originally Posted by TheRule View Post
I had my doubts and now it's confirmed...new impeller didn't work. My luck as usual. I know there's no blockage in the weep hole hose. And I know the water muffs are tight and lots of water flowing. Help!!

Could there be a blockage down where the prop is and if so, can that lower unit even be serviced? What about from the impeller up through the housing? Is that hose accessible without taking the whole damn thing apart? Anything else semi-simple to check?

This one f*****g problem is going to cost me from selling the boat. That and the Garmin decided to quit working (backlight out).
The simplest thing I know is take it back apart. Make sure your seals are put on there right. Also, there is a rubber ring that is on the shaft. Make sure it is all the way down on the shaft. Make sure you are using double water feed muffs, the single rarely works on that motor.

Last edited by SWF Pontoon Angler; 03-23-2019 at 08:28 AM. Reason: more info
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Old 03-23-2019, 08:30 AM
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There is also a dart fitting at the front of your motor where the tube can slip off of.
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Old 03-23-2019, 08:58 AM
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SWF,

Wouldn’t the dart fitting be squirting water and be obvious?
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Old 03-23-2019, 09:31 AM
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Originally Posted by stephenson View Post
SWF,

Wouldn’t the dart fitting be squirting water and be obvious?
Actually no....because it's inside the case and drips straight down the back of the motor. Only reason I know is mine slipped off while I was in the boat, stopped peeing. Took the case off and looked around until I saw it. It's hard to put back on.

Last edited by SWF Pontoon Angler; 03-23-2019 at 09:32 AM. Reason: more info
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Old 03-23-2019, 09:34 AM
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nevermind just read your pic.
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Old 03-23-2019, 09:35 AM
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Originally Posted by stephenson View Post
SWF,

Wouldn’t the dart fitting be squirting water and be obvious?
So what I know now is....Water makes it up to and out of the thermostat housing when thermostat is removed and the motor is running (implying the impeller is all good). The tubes exiting the water jacket (is that the name of the main component in the picture above?) in the picture above with the red arrows are all clear. I've blown air and water through. Now...with the thermostat out, I read from a 2012 forum that if you blow air up into the tell tale and with the thermostat off, you should feel air come out of the thermostat area of the housing. I did not. If fact, the air basically blew the tube off the water jacket nipple. And then did the same thing with that lower tube that's basically a U going from one side of the water jacket to the other. Both times I tried to shoot air in either side of that, the tube came off the nipple. So....I have no idea what's inside that water jacket. I don't know if its a hollow chamber or shares space with the oil filter (the red cap up top I presume. But I'm guessing something in there is clogging this whole thing? Thoughts?
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Old 03-23-2019, 09:45 AM
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Did you take the telltale fitting out and check that the fitting and port are clear? Mine had blockage in the port behind fitting.
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Old 03-23-2019, 10:31 AM
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Originally Posted by Dacman View Post
Did you take the telltale fitting out and check that the fitting and port are clear? Mine had blockage in the port behind fitting.
thats typically where they plug but yeah he checked that, read the captions in his pic.
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Old 03-23-2019, 11:16 AM
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GRRRRRRRRRRRRR!!!!!!!! #@&%*%&@!*!#

I don't know what to do. I need to get this damned thing working as I'm losing all kinds of showings. Why Why WHYYYYYY did this have to happen now!

Anyway, the pic shows the updates. The two bottom hoses forming a "U" is for fuel, as well as the far top right. Fuel looks clean, no worries there. Somewhere inside that unit is blocked, but I don't know how it ties into the engine block for cooling, and I would imagine (assume....big mistake) that the chamber for water is sizeable in order to have enough water to keep it cool inside.

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Old 03-23-2019, 11:31 AM
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Originally Posted by mdees88 View Post
thats typically where they plug but yeah he checked that, read the captions in his pic.
I read it as it blew the hose off of the fitting. Not familiar with this engine. Don’t some Mercs have to reach operating temps to piss?
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Old 03-23-2019, 11:39 AM
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Originally Posted by Dacman View Post


I read it as it blew the hose off of the fitting. Not familiar with this engine. Don’t some Mercs have to reach operating temps to piss?
I DID wonder that, however I was scared to crack the engine. And I really thought from my previous flushes, it pissed right away.
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Old 03-23-2019, 12:15 PM
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Originally Posted by TheRule View Post
I DID wonder that, however I was scared to crack the engine. And I really thought from my previous flushes, it pissed right away.
you posted this.... I'm assumed this meant you pulled the tell take hose off where your arrow is aND "manually" poured water through it to verify it is clear. Is that what you did?

If not I would do what dacman said and disconnect the tell tale hose where it connects to the nozzle in the sidecover. That is the most common place where restrictions occur....


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Old 03-23-2019, 12:52 PM
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[QUOTE=mdees88;12363676]you posted this.... I'm assumed this meant you pulled the tell take hose off where your arrow is aND "manually" poured water through it to verify it is clear. Is that what you did?

If not I would do what dacman said and disconnect the tell tale hose where it connects to the nozzle in the sidecover. That is the most common place where restrictions occur....


Yes, I disconnected that hose that leads to the tell-tale to the water housing right there at the brass nipple and blew air through it and poured water through it and it ran through the tell tale with no obstructions. I even removed the nipple. Saw no signs of blockage. So somewhere between that brass nipple and the thermostat is a block OR it's like he said...the motor has to get at temp for the thermostat to open up and allow water to escape to the tell tale. But this just seems suspect and I don't remember the tell tale not peeing right away. I'm pretty sure it did but perhaps I'm wrong?

Thanks for your replies and everyone's replies too btw.
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Old 03-23-2019, 01:22 PM
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[QUOTE=TheRule;12363768]
Originally Posted by mdees88 View Post
you posted this.... I'm assumed this meant you pulled the tell take hose off where your arrow is aND "manually" poured water through it to verify it is clear. Is that what you did?

If not I would do what dacman said and disconnect the tell tale hose where it connects to the nozzle in the sidecover. That is the most common place where restrictions occur....


Yes, I disconnected that hose that leads to the tell-tale to the water housing right there at the brass nipple and blew air through it and poured water through it and it ran through the tell tale with no obstructions. I even removed the nipple. Saw no signs of blockage. So somewhere between that brass nipple and the thermostat is a block OR it's like he said...the motor has to get at temp for the thermostat to open up and allow water to escape to the tell tale. But this just seems suspect and I don't remember the tell tale not peeing right away. I'm pretty sure it did but perhaps I'm wrong?

Thanks for your replies and everyone's replies too btw.
I would fill a trashcan with water and rum the motor in it. I would go a full minute and see if it pisses. On the muffs my F300 takes 15 or 20 seconds before it starts pissing....
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Old 03-23-2019, 01:29 PM
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One more thing I have found , on a small 25 hp that wouldn’t pee , I blew out the fitting on the block with air and ran a piece of wire in it to make sure it was clear. It then peed for a while and clogged again. I was just pushing the debris back in there to return again.

End result was that there was a piece of debris in there that couldn’t make its way through the fitting , as it was bigger than the hole.
I removed the fitting and ran it without it in place in the driveway, then, put some vinegar in the port for good measure and let it sit.
Then ran it again to push everything out of the big hole. Reinstalled fitting and hose . Good to go.
May or may not help your situation.
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Old 03-23-2019, 01:32 PM
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Give her a test run in the water before pulling your hair out .
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Old 03-23-2019, 01:38 PM
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[QUOTE=TheRule;12363768]
Originally Posted by mdees88 View Post
you posted this.... I'm assumed this meant you pulled the tell take hose off where your arrow is aND "manually" poured water through it to verify it is clear. Is that what you did?

If not I would do what dacman said and disconnect the tell tale hose where it connects to the nozzle in the sidecover. That is the most common place where restrictions occur....


Yes, I disconnected that hose that leads to the tell-tale to the water housing right there at the brass nipple and blew air through it and poured water through it and it ran through the tell tale with no obstructions. I even removed the nipple. Saw no signs of blockage. So somewhere between that brass nipple and the thermostat is a block OR it's like he said...the motor has to get at temp for the thermostat to open up and allow water to escape to the tell tale. But this just seems suspect and I don't remember the tell tale not peeing right away. I'm pretty sure it did but perhaps I'm wrong?

Thanks for your replies and everyone's replies too btw.
It should start peeing in seconds.
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Old 03-23-2019, 01:42 PM
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Originally Posted by TheRule View Post
I had my doubts and now it's confirmed...new impeller didn't work. My luck as usual. I know there's no blockage in the weep hole hose. And I know the water muffs are tight and lots of water flowing. Help!!

Could there be a blockage down where the prop is and if so, can that lower unit even be serviced? What about from the impeller up through the housing? Is that hose accessible without taking the whole damn thing apart? Anything else semi-simple to check?

This one f*****g problem is going to cost me from selling the boat. That and the Garmin decided to quit working (backlight out).
I would still check your impeller installation, it's easy to check.
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