2004 25 hp Mercury Water Pump issue.

[Oger1]

2004 ,25 hp Mercury 2 Cycle. installed new Water Pump, no Water. Removed Lower Unit checked Impeller installation,Key gaskets etc. Ensured pick up tube was connected when re installing Lower Unit.Removed and Check Thermostate. .I ran Water through Thermostats Port Water flowed free out the pick up Tube. Ran Engine on Muffs and in Tank Still no Water.

 

[Oger1]

Is there a Poppet Value ? If so where is it Located

 

[racingdave]

Just a thought i had close to the same issue with my warer pump replacement and realized i did not install the lower rubber tube seal into the upper housing

 

[flyingscott]

Did.you install the copper tube back into the powerhead before installing the lower unit?

 

[Oger1]

Yes ,had the Lower unit off 3 times .checked tube at both ends

 

[ThomW]

Have you tried taking a piece of weed whacker string or similar item and running up the tell tale hole? Was it pumping water before impeller change? Sometimes you get nests in the the tell tale line that prevents water from pumping out.

 

[Oger1]

Tried that .
Thanks

 

[flyingscott]

is the key in the impeller? Are the washers on the impeller? Are you sure everything is lined up? Did you buy a good quality impeller?

 

[Oger1]

Figured out water pump is working I'm not getting water from pump to power head .Checked copper pickup tube tried to clear water passages tubes ,removed Thermostat ran Water through port ,Water flows out of Exhause .
suspect upper seal ?
Thanks

 

[Oger1]

Racing dave a re you talking about upper seal in the power head or the one on the pump ,for pick up tube ?
thanks.

 

[flyingscott]

What happens when you put water up the tube with a hose?

 

[racingdave]

I am talking about the rubber grommet that fits inside the upper water pump housing with out that it will lake volume of water pumping to powerhead,look in your water pump kit and see if it is in there.Check your old upper housing were the tube goes into and you will see the rubber insert.How about when you installed the upper housing did you rotate the shaft CLOCKWISE as you psh down on the housing?

 

[Oger1]

Thanks for all the great info.I removed the Power head .Looking through the water pickup Tube looking from the top I can see some blockage. Using a pick it feels like Rubber maybe a Seal ? No access from the Top , How in the World would you replace it ,if it is a Seal . It would be next to impossible working from the bottom ,through the exhaust Housing . About ready to take a Break .Thanks again

 

[flyingscott]

Pull the powerhead off.