1970 evin 115 water pump question?

[anzomcik]

I picked up this 1970 evinrude 115 motor for a good price to power this boat i had. when i had it with the muffs on it did not show signs of a good water pump. (to be honest i deal mostly with mercury and it is easier for me to tell when a merc needs a water pump).

So i replaced the waterpump. well the pump looked fine what i noticed was above the pump housing there was one plastic tube about 3 inches long. But there were two holes in the pump houseing. So i looked up the mid section of the motor and there was two copper tubes coming down. My thinking was maybe something happened to the other plastic tube. So i made a new tube out of plastic i work in a machine shop, and i still have no sign that the pump is working.

My questions with the older evinrudes do they have a visible check to see if the water pump is working, or is it on a thermostat and only kicks open when hot enough.

My controls have a "hot" light on it, so i drove the boat around for 20 minutes and the motor ran great, and the "hot" light never turned on.

Did i do right with the secound plastic tube i put in? Any help would be great. Thanks

 

[F_R]

Re: 1970 evin 115 water pump question?

If it ran around for 20 minutes, you got it together right.

The plastic tubes are an assembly aid. You stick them into the water pump outlet to guide the tubes in, since you can't see what you are doing up in there. Once it is all assembled, the plastic tubes don't do anything anymore.

It is supposed to blow water out the exhaust relief holes in the backside any time it is running. It will blow more water when the thermostat is open than when closed, but there should always be some. The thermostat constantly opens and closes as required to maintain correct powerhead temp, so it is not a matter of just opening and staying open once it warms up.

 

[anzomcik]

Re: 1970 evin 115 water pump question?

When it is at idle, it will drip a couple drips a secound. does that sound right?
But i do feel better about it now you think it is correct. Thanks

 

[patrick4266]

Re: 1970 evin 115 water pump question?

If your planning on keeping that motor you should install a "pee hole" then you will not be guessing if its pumping or not. I installed one one mine and it was extremly easy.

 

[anzomcik]

Re: 1970 evin 115 water pump question?

Patrick, please tell me how to do that. I am planning on selling it soon (if i dont fall in love with it) but i want the peace of mind, and it makes buyers feel good also.

 

[patrick4266]

Re: 1970 evin 115 water pump question?

some one has a link with the instructions. I am sure they will post it shortly.

 

[anzomcik]

Re: 1970 evin 115 water pump question?

I just did a search and found it. Thanks for the heads up i will be doing this to the motor.

 

[patrick4266]

Re: 1970 evin 115 water pump question?

It was probaly the easiest thing I did on my motor. I just used some speed ometer tubing and some fittings I had laying around.