Whaler Central - Boston Whaler Boat Information and Photos

Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: 1986 90 HP Mercury - Water Pump Issue

Posted by Gmondun on 09/28/11 - 3:09 PM

Hi,

I just replaced the 3 gaskets on the water pump, new impeller and new upper casing. However, when I connect the hose and run the engine to test the pump, the water doesn't pump out of the tiny hole. Instead, it sprays mostly around the area of the hose adapter and around the prop. Any thoughts on what the issue is?

Thanks,

Gordon

Posted by Joe Kriz on 09/28/11 - 3:12 PM

Check the fitting at the end of the hose.
Insects etc like to get in there.

You can also disconnect the hose from this fitting and see if water comes out the hose. If not, the hose may be plugged up....
Then take the entire hose off and see if you can clear the blockage.

Posted by Gmondun on 09/28/11 - 3:15 PM

My fault Joe. What I meant to say is that plenty of water is coming out of the hose itself and running through the bunny ears into the pump, but it doesn't seem like the pump is circulating the water up to the engine. The "tiny hole" I was referring to is right below the engine block. The one that you usually see spitting water when the water pump is running correctly.

Posted by Gmondun on 09/28/11 - 3:21 PM

In fact, I think most of the water spits out around the gear case.

Posted by Derwd24 on 09/28/11 - 3:41 PM

Did you remember to install the little key (or wedge) between the impeller and the drive shaft on reassembly?

Edited by Derwd24 on 09/28/11 - 3:42 PM

Posted by Gmondun on 09/28/11 - 9:36 PM

No I didn't! I wasn't sure what that thing was. Thank you.

Posted by Bake on 09/29/11 - 4:59 AM

yep there is the problem. Good trouble shooting right there.

Posted by Mr T on 09/29/11 - 6:36 AM

Derwd24 wrote:
Did you remember to install the little key (or wedge) between the impeller and the drive shaft on reassembly?

Verrrry impressive call there.

Posted by Gmondun on 09/30/11 - 3:57 PM

Just put the key in and it's spitting water. Thank you. One thing I noticed though is that water still comes out from where the water pump connects to the top half of the engine. Is that just because the water pressure is too high for pump to spit it all out of the tiny hole?

Thanks again.