Testing Lower Unit for pumping water - 1983 Evinrude Yachtwin 9.9

[Putzaroni1]

I pulled the leg off of this motor because it was not pumping any water through the telltale. I attached a hose with an adaptor to the copper water feed pipe coming out of the top of the motor and water came out of the telltale good. I did the impeller and replaced some of the O-rings so it would seal up and when I started it, no water from the telltale. I remember someone saying that possibly the copper tube didn't go into the rubber seal it plugs back into properly.

Is there a way to test the lower unit when I have it off ? I'm going to have to pull it off anyhow to track down where the blockage is.
Any suggestions or tricks ?

 

[masterbt]

I would think maybe dowl pin in the impeller missing

 

[Putzaroni1]

Nope, I tested that when I put it on. I think you're referring to the key and it is there. I'll be pulling it all apart unfortunately and I'll double check that. I guess my question is more, Is there a way to test a lower unit to insure it's pumping water while its off the engine.

 

[masterbt]

submerge in water and make an adapter and use a drill might work.

 

[boobie]

Agree with the above. Used that trick a number of times.

 

[Putzaroni1]

I will try that. I suspect you just want to see water come out where the rubber grommet is ? I pulled the leg off again and checked the key and it's there and the impellor is doing what is should when I turn the driveshaft. I think the issue is with the water tube back in the rubber grommet on the impellor assembly. What's the trick ? I've done a few of these before but never one with such a long leg. Is there a trick to lining it up or is it just trial and error (please say it's not). I tried bending the water tube slightly so it lines up with the middle section not attached but still it starts first pull but no water coming out of exhaust or telltale.

 

[masterbt]

ok what is the model number

 

[Putzaroni1]

The model for this motor is E10SELCTC.
I kinda stalled out on it and went fishing using a different motor but decided to pull it out and work through this.
I pulled the water pump housing off and inspected that the plate was the right way and that the key way was in place. When I turn the driveshaft I feel the resistance of the impeller so I think that's all right. I'm now going to try the above suggestion to submerge the leg and try a drill on the driveshaft. I'm guessing I'm expecting to see water come up from the little water grommet where the copper pipe goes in ?

 

[Putzaroni1]

So I held the lower unit in bucket of water, used a piece of rubber hose over the top of the shaft and the appropriate sized socket over the rubber hose.
I took my cordless drill with an 3/8ths socket adaptor and it worked like a charm. With someone holding the lower unit, I was able to spin the driveshaft no problem.

Now the bad news..... Nothing is coming out of the black grommet which holds the copper tube when everything is back together.

What does that mean ?

 

[kbait]

If the impeller plate is bent at all, it won't seal correctly. Do you have the waterpump housing submerged for test? Impeller must be underwater to begin pumping. Intake plugged up? Is the metal insert in the waterpump housing oriented correctly? It can only go one way, and can 'melt' (and turn to a different orientation) into the plastic housing if overheated..

Good luck!

 

[Vic.S]

So .........

What does that mean ?

You were spinning it the wrong way ( unlikely but it has to be mentioned)

You have assembled something incorrectly. Impeller housing cup correct?? ... I think that is what kbait called the metal insert

It's the wrong impeller.

The key is not driving the impeller.

The pump is not submerged in your bucket

The water intake or intake screen is blocked

 

[Putzaroni1]

Thank you both !
I just created a little jig to hold the lower unit in the Garbage can as my son was not as available as I would have liked him to be (is it just me or ????)
I filled the garbage can to the top and then poured water down the rubber grommet where the water is supposed to come out. Not sure which of the 2 did it but when I started cranking the driveshaft over it started pumping. Maybe I wasn't going fast enough before with the drill or the water level wasn't high enough.
So there is water now coming out of the rubber grommet. How much should there be ? Here is a video of it pumping

https://www.youtube.com/watch?v=PUalirrrxYM&list=UU0NM9mWxlR4FKlO73Zh4hSg&index=1

I also noticed a little bit coming out under the water pump housing which sounds like that's not a good thing based on what KBait is saying.
Please let me know if that looks about right or if it should be way more.
Thanks guys !!

 

[Vic.S]

You still dont have it submerged ! Mount it so that the water is just covering the pump.

I have never tried it but I'd expect a nice fountain if its spun fast enough.

 

[Putzaroni1]

I am going to take another run at this. I think my issue is lining up the water tube because it is pumping water and the top of the motor when I put a hose on the water tube, lots of water comes out the telltale. I think it's getting jammed into the grommet when I put it back together. It's a super long water tube. I saw on the Machinist's website that there is a special grommet for long shaft motors. This is an extra long shaft (25"). I purchased one of these grommets so we'll see if it helps. It was using the usual type before but maybe I'm missing something. Is there any trick to getting these to line back up ? It's pretty much blind and if it's off even a little, after bolting it all back together, no water !!

 

[Putzaroni1]

So I did remove the leg yet again and put it all back together. It fired up and was not peeing any water again but if I gave it throttle, at mid RPM it does so I'm guessing there is something plugging the upper portion of the cooling system. I'll start a new thread for this. Thanks all