Water pump issues 115hp

[aanda6]

Hi, i replaced my water pump. removed hose from thermo housing. Started boat, no water out hose. removed thermo housing and thermostat, started motor . Still no water.<br />Q1. does that all need to be sealed for water to get through?<br />Q2. If not any ideas?<br />Manual doesn't show or say much about water at top end. I am stumped.

 

[aanda6]

Re: Water pump issues 115hp

sorry forgot to say is a 1977 115 v4. Could i have an air pocket stopping water?

 

[aanda6]

Re: Water pump issues 115hp

J.reeves or Dhadley please help

 

[voodoo]

Re: Water pump issues 115hp

If it's the same water pump that is on my 65 there really isn't much to it.<br />The pump is below the water line so there is no "priming" issues.<br />Was the key in place?<br />The people that rebuilt my motor neglected to install the grommet between the pick up tube and the water pump.<br />This forced the pump to fill the entire lower leg before water would get to the power head.<br />Water came out of the exhaust relief vents like a garden hose.<br />OH warning came on fequently untill I found the problem.

 

[aanda6]

Re: Water pump issues 115hp

Key was in place but I am thinking it seemed ti sit in the shaft a long way with very little hang out to catch on impeller. What is the gromet you are talking about.is that the one on top of impeller housing cover.

 

[Droll]

Re: Water pump issues 115hp

with very little hang out to catch on impeller

But it did catch the impeller ?? it should lock the impeller to the driveshaft , you should not be able to turn the impeller whit out the driveshaft following .<br /><br />

What is the gromet you are talking about.is that the one on top of impeller housing cover.<br />

Yes , some models also got a short "guiding" tube helping the pick up tube into place .

 

[aanda6]

Re: Water pump issues 115hp

That I don't know as I installed the impeller into to housing first the put it onto the drive shaft. I have noticed in the manual I don't have the o ring that goes on the outside of housing at the driveshaft. Would that be causing the problem maybe?

 

[Droll]

Re: Water pump issues 115hp

I have noticed in the manual I don't have the o ring that goes on the outside of housing at the driveshaft

They put the O-ring there for a purpose ,but I would think you shuld have some waterpressure whit out it . <br /> <br />I would remove the lower unit to recheck everything , just to be shure everything is working .<br /><br />Get a new key if it's not holding the impeller locked .<br /><br />You might be able to check the impeller before removing the Lu , tilt up the engine > let the water run out > remove the plugwire ( we do not want the engine to start )> turn the flywheel by hand , you shuld be able to hear the impeller ( sounds like rubber against metal , sqweeking ) <br /><br />You shuld not be running the engine before everything is fixed .

 

[aanda6]

Re: Water pump issues 115hp

Thanks droll, will try that later today. Have only had the motor a few months and looks like it was not getting water for a long time. Hopefully I can work out why. Do you think the two water tubes could possibly be blocked as well?

 

[Droll]

Re: Water pump issues 115hp

and looks like it was not getting water for a long time

What's along time ? and did it overheat ( alarm go off ? or other indications ) ,have you tried tutching the cylinder heads ?, you should be able to hold your fingers there for some seconds whit out burning .<br /><br />

Do you think the two water tubes could possibly be blocked as well?

Maybe , what's the condition where you do run this engine ,sand ,plants or other thing to create blockade .<br /><br />Things to do :<br />Remove Lu , redo the impeller ,make shore everything is working by the book .<br />Then lower the LU into a water barrel ( water above pumphousing ) , try turning the driveshaft with a drill ,if the the drill can get some rpm ( IF you got a big enught drill ), it should start pumping water , if so > water pump ok .<br /><br />Next step :<br />Try connecting your garden hose to the pick up tube ( NOT full pressure ), if there is any blockade you will find it now ( remove the thermostats , they will not work on cold water )<br />Leave the water running for some time , and look for improvement in the water flow ( IF it's blocked ) <br /><br />After mounting the LU again , reinsert the thermostats before starting the motor .<br /><br />You are 100% you get the water intake on the LU low enough into the water ? , and no blockade below the waterpump ? ( waterintake ) .