Water pump-need help

[5150abf]

Okay, the last time I had it out the tell tale was spraying like it should, replaced control box this weekend, go to test run on muffs and it won't pump any water-put new impeller in-still won't pump water BUT you can feel air coming out the tell tale but no water.
Any ideas?
I was in deep water all night, didn't hit any sand bars or mud so I don't see how it would be plugged.
If the pump is moving air it should move water you would think, especially on muffs.
Accepting any suggestions

 

[5150abf]

Re: Water pump-need help

Another oddity, if you hold the muffs on tight it will put some water out the tell tale but stops when you release the pressure and it still blows air when it quits dribbling water.
So there is a clear path between the intake and the tell tale
This has me stumped, it should work but doesn't.

 

[ezeke]

Re: Water pump-need help

The impeller pump is not self-priming; it must be fully covered with water before it is run or it will self destruct. I would check the impeller again.

 

[Benny1963]

Re: Water pump-need help

may have to pull it down and recheck make sure you have good water pickup
tube alignment check grommett there
bennyb

 

[5150abf]

Re: Water pump-need help

Okay, anything that doesn't involve pulling the lower again?
I will go pull it again but it has always pumped water right away on the muffs, it will give me a chance to look for an obstruction somewhere.
AAARRRGGGG!
Thanks

 

[5150abf]

Re: Water pump-need help

Okay ,pulled it again checked, everything as it should be, impeller perfect, confirmed water tube went into gromet and still nothing.
There was water in the impeller housing.
Put a little grease on the impeller just to make sure I don't smoke it.
Could a thermostat do that?
Like I said it has always pumped water right away on the muffs.
Still clueless??????

 

[HighTrim]

Re: Water pump-need help

Running your motor on muffs has no indication whether the water pump is functioning properly or not. The muffs 'force feed' the cooling system. If water is not exiting via the tell tale while on muffs you need to trouble shoot a restriction in your cooling system. Ensure the water intake area is free of debris. Remove the rubber tell tale line and ensure it is not blocked. Also remove the nipple and clean it out. Little critters love building nests in them over the winter. If that checks out, you will need to drop the lower and remove the t stat(s). Flush water from the water line to the t stat housing, then backflush from the t stat housing to the water line. If more than 1 t stat, repeat this for the second t stat housing after replacing the first. This will ensure there is no restriction. If this passes, you are likely shoving the grommet on top of the impeller housing into the housing as you bolt up the lower unit. This is a common occurence.

It is not a tsat issue as the tell tale is located before the tstats. That is not to say however that your tstats are functioning. If you are going to flush the system anyways, I would throw in new ones as you already have the housing removed.

 

[5150abf]

Re: Water pump-need help

The tell tale and nipple are clean, I checked that first and you can see light from the water pump housing down to the pick up screens.
Must have picked something up cause it will hardly pee any water even with the muffs clamped on.
Off the the t stats and a flush then.
Really odd cause it was peeing when I put it on the trailer last time out.

 

[5150abf]

Re: Water pump-need help

Sorry! It's an '81 Evinrude 50 horse

 

[5150abf]

Re: Water pump-need help

Just dropped the lower again(!!) water moves freely between the tube and tell tale and tell tale to the tube so that rules out a restriction I will put it together again(!!) and see what that does, maybe I blew something out or I am missing the pick up tube,hopefully 3rd time the charm.

 

[HighTrim]

Re: Water pump-need help

Your grommet is restricting the water flow then likely. Be very careful when sliding the lu up and bolting. Is easier with 2 ppl. A little dish soap on the grommet may ease the water tube into it without shoving the grommet into the impeller housing.

And BTW, that was a speedy test! Wow

 

[5150abf]

Re: Water pump-need help

I want to go fishing Sat, daughters have track Tue and Thur so I am motivated. I will go really slow this time and I use a little grease on it, normally works really well.
Thanks for the help, never had problems like this before.

 

[5150abf]

Re: Water pump-need help

I give up,still nothing.
this time I thought I got tricky and put a small zip tie on the water tube then put the grommet on the tube and then put it into the pump, the zip to keep the grommet from sliding up.
I know for a stone certainty that the tube is in the pump and the grommet isn't restricting anything, water from the hose moves from the tube to the tell tale and vice versa.
Even more stumped than before, I am open to anything at this point

 

[HighTrim]

Re: Water pump-need help

Even more stumped than before, I am open to anything at this point

You and me both. The only other thing that I can personally think of is that there is a resriction in the water intake area as stated before. That is to say, a restriction between the water intake and the pump. The hose should force feed the water to the tell tale without an impeller even installed.

 

[5150abf]

Re: Water pump-need help

I took the base plate to the pump off and you can see light through the screens so it isn't that either, and I found out you can cut your foot pretty good when you drop the lower on it.
There is a small launch close to the house, I will go stick it in Wed. and see what happens but to be honest I don't hold out much hope for that.
I will hit the Old OMC mechanics at work tomorro and see if they can come up with anything.

 

[5150abf]

Re: Water pump-need help

Just shut the garage down and noticed The last time I put the pump together I forgot to put the seal on that is between the pump and drive shaft tunnel, would that make it not work?

I am busy tomorrow but I will get that back on Wed and try again.

 

[72SideWinderSS]

Re: Water pump-need help

Dumb question, is the key still in the impeller ?

 

[5150abf]

Re: Water pump-need help

Valid question and yes, like I said I am up for anything at this point and that is the sort of thing that usually gets you.

 

[F_R]

Re: Water pump-need help

My 2c says you need to read what HighTrim said up above. There might not be anything wrong with that motor. Whether there is or not, you can't tell by running it on muffs. You said yourself that you can wiggle them around and get it to work. Sounds like it is a muff fit problem.

 

[5150abf]

Re: Water pump-need help

I ordered a tstat today and my buddy is coming over tomorro with a compressor so between the two we should get it.
The paint on the gasket is original so I need to change it anyhow, I think 27 years is enough.
FR, I ment to say if you clamp the muffs on really tight so no water comes out around them it will force some water out the tell tale so I am sure there is a restriction somewhere.
QUESTION-Is there anything that I can hurt with the compressed, I have(thankfully) never had the powerhead apart so I don't know what all is in there ,don't want to compound my problem .