How many places does the water exit

[gejandsons]

Engine heat alarm still sounds after idling for a few minutes. Water pump impellor looks good by the way. With the muffs on & the water turned on I'm getting a lot of water out various pee holes on the foot but very little out of the exhaust. I'm suspecting a hole in a water jacket or the tube going from the pump to the engine. I placed a rubber hose on the tube that stabs into the water pump & you can blow thru it with no resistance. The air sounds like it is coming out near the area that the flow tube enters the engine. I can't see well enough for a visual inspection.

If the water enters the engine thru this tube, should the 2 exhaust ports & the thru-hub exhaust & the tell-tale be the only places water should be exiting the engine?
1989 Evinrude 110 HP
E110TLCEM

 

[rickdb1boat]

Re: How many places does the water exit

No, there are vaious other places in the lower unit that let water out (Not exhaust). You will not see much coming out of the exhaust reliefs or through the prop at idle on the muffs. Water pump impellers can look fine, but still need replacing...

 

[gejandsons]

Re: How many places does the water exit

I removed th lower unit & connected a hose to the tube that was hooked to the water pump housing. Engine is still running hot. The water from the telltale is warm. The heads get too hot to touch. All other water exiting the engine is cool.
Where are the thermostats located on a 1989 110 HP EVINRUDE

 

[rickdb1boat]

Re: How many places does the water exit

#29 .........

 

[gejandsons]

Re: How many places does the water exit

Thanks Rick for the pic.
That will at least let me start the tear down in the right direction. After doing a little research I have come to the conclusion that the T-stat is usually pretty reliable & the water pump is more likely the problem. But with a hose hooked directly to the water inlet tube I am still having a over heating problem. The thermostat must be the cause. There is not much to the cooling system once the pump is out of the picture.
This engine has not been run since mid summer '06. I boat a new boat & have not run this one.

 

[Solittle]

Re: How many places does the water exit

The t-stats for that engine can be a bit of a bear to replace. Some marine wrenches even want to plull the powerhead to do it but it can be done without. First remaove the lower shroud below the engine pad (#6). Then using a 1/4" socket wrench with a extra long extension, a universal and a 7/16" socket, remove the top bolt of the t-stat cover (#37). Then take a 7/16" box/combo wrench from underneath the pan to get to the lower two bolts of the t-stat cover. That is why you need to remove #6. You may need to loosen the bolts holding the pan to get a tad more room.

When you are ready to reassemble apply the sealer as directed in the service manual and fasten the pieces together with tie wraps and let sit overnight. I would also apply the sealer to the threads of the three mounting bolts. Do not cut the tie wraps until you have the three bolts started.

While the t-stats tend to be reliable they will stick especially if a salt water engine. Several months ago I did this job on both of my 1987 110s. One was frozen and the other would open only part way.

 

[G-Daddy]

Re: How many places does the water exit

I have to work on my t-stats on my 1992 Johnson 100 every year. I pull the hoses off the housing, spray some wd40 down the holes, insert a small-bladed screwdriver in and work the t-stats a little. Sometimes I have to do this three of four times in order to free them up enough to work consistently. I also change them at least every three years. I drilled a couple of large holes in the lower cowl, insert a socket on an extension and use a ratchet to do the bolts. Then when I'm done I use large rubber gaskets, stainless steel fender washers, and stainless bolts to close up the holes I made in the cowl.

 

[mudd_mickey]

Re: How many places does the water exit

You're heading in the right direction on your troubleshooting and if you haven't replaced the impeller in quite some time just replace it. Don't forget to test your temperature sending units to make sure they aren't malfunctioning. Also, if your motor is running lean it could overheat as well even though all cooling components are 100%.

 

[Big Keepers]

Re: How many places does the water exit

I'd check on the lean running possibilities too. Too hot to touch. I use the two fingers and three mississippi rule. If you can put two fingers on the cylinder head and count to three mississippi before you say ouch, its running at the proper temp. After you fix the t-stat and impeller situation, make sure you check to see if its running lean or not. The better way to check is one of those infrared temperature reading guns. Point the red dot and read the temp. You want somewhere in the 148?F range I believe.

When you put the lower unit back on make sure the inlet tube sits correctly into the lower unit and doesn't get kinked. I've made that mistake a few times.

 

[gejandsons]

Re: How many places does the water exit

Thanks for all the input. You all have been a tremendous help. I am just gettng back to this project. I purchased a no touch infrared thermometer from sears & found the overheating is real. I removed both hoses from the thermostat housing & cranked the engine & found that it does not get hot with the hoses disconnected. No doubt now, that it is the thermostat. I will attempt removal if unable to free up as G-Daddy spoke of. Thanks again

 

[gejandsons]

Re: How many places does the water exit

I removed the T stat housing with no complicatons, just very hard to get to. Cleaned the T stats in a weak Muratic acid solution. Checked Temp to open in a hot cup of water from the microwave. T stats working Okay - Re install & crank engine - Shut engine off @ 180 degrees. All water being expelled is the same temp as water going in. Checked temp of hoses going from head to T stat housing & founnd them to be only 90 degrees. Cracked both rubber hoses to let the air inside escape & then T stats opened. Engine now running @ 145 degrees. Will finish putting together & post results from test run in a few days.