Overheating??

[Kawiace]

Hello all I have an Evinrude 115 motor model # VE115TLETS I rebuilt the carbs and it ran great on the muffs. Now I am getting a temp alarm. It has water coming out of the pee hole when throttled up but not at idle. when the water does come out it is really hot? Last time it was on the lake or on the muffs it was not hot. Please help dont want to drop the lower unit if I dont have too.

 

[emdsapmgr]

Re: Overheating??

Fresh water from the lower unit goes into the powerhead close to the telltale outlet. If the impeller is pumping, you should see a strong telltale-all the time, including idle. You can have a strong telltale and still overheat the powerhead-if the cooling water cannot circulate and exit the block into the midsection. The thermostats are at the end of the powerhead cooling cycle-if one or both are stuck shut-no water can exit the block and the powerhead will overheat. Pulling the lower unit is easy compared to changing the thermostats on that bubble back engine. You may wind up doing both. I'd start with the thermostats first.

 

[Kawiace]

Re: Overheating??

Well I removed the lower unit not too bad. I did find that the impeller was not turning?? The plastic key was really worn out so off to the parts house to get new impeller and seal kit. That should be fairly easy. NOW about the thermostats I was able to get the housing off and the old ones out but there HAS to be an easier way. I had to use a shaved wrench and only a tiny turn each time I can not figure out how to remove the lower cover to get a better access without removing the motor any advice would be great. Is there any secret to reinstalling the lower unit as well seems pretty straight forward but so did removing that pesky phillips screw in the lower unit ( that I did not do thanks to this web site) I also removed the large cover on the back of the motor and it was DRY I am sure this is not right. I did use a hose to run water up the tube from the pump after I removed the lower unit and water came out the holes. Do you have to bleed the air out of the system when reinstalling the thermostat??

 

[emdsapmgr]

Re: Overheating??

Good thing you checked the lower unit. A good find. You can loosen the lower cowling by unbolting it. When doing this, you will gain just a little slack-not much on these later units with the VRO-but enough that it is worth your while. A skinned-knuckle job for sure. Just put the outer exhaust cover back on, with some gasket sealer and a new gasket. You might want to retorque the bolts on that cover after running the engine 2-3 times. That's a good test to put the hose on the water tube. Sounds like the water flows properly through the powerhead. Once you get the new stats in, you should be in good shape. Double check the nylon pressure relief valves to make sure they are not deformed by any oveheat. You don't have to bleed any air during reassembly.

 

[Kawiace]

Re: Overheating??

Ok first off thanks for all the help this site is GREAT!!! I have the lower unit back installed and seems to working( by hand anyway ) I removed the powerhead cover and then under the cover the other block of metal think it is the exhaust manifold. Anyway some one did a REALLY bad job sealing this they used some type of sealer and no gasket so that is now on order. Here is my question when I pulled the manifold off it was FULL of hard black bits of something they are not metal they crumble in my fingers. The inside of this area is REALLY black and needs cleaning not sure what to use. Thought of using spray Sea Foam and letting that sit since I have to wait for the stupid part anyway. So any ideas?? Thanks.

 

[emdsapmgr]

Re: Overheating??

Carbon from the spent combustion process? Pretty normal on a 2 stroke crossflow. Nobody said they were clean-running engines. Cleaning the powerhead exhaust chest certainly won't hurt, esp the areas around the exhaust ports.

 

[Kawiace]

Re: Overheating??

Hello again, Got the motor put back together and new trim fuse block works great!!! Motor fires up great-smokes a lot but think that is from me pulling the exhaust manifold and cleaning (sea foam). Have to replace the prop due to damage so picked up an evinrude 13.25 x 17. Pulled the old prop off and tried to install the new one. It will go on but not enough threads to put the nut on and the cotter pin. The prop that is on it now is a Michigan 011002 and the new one is a evinrude oem prop. The washer on the back of the prop(close to the lower unit) made for each brand??

 

[emdsapmgr]

Re: Overheating??

That engine should have a specific thrust washer on it for operation with both of those props. Check the part number stamped on the brass washer. Should read 315810. The correct factory thrust washer should provide the room to install the cotter key.