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1986 90 HP Mercury - Water Pump Issue
Gmondun	#1  Posted on 09/28/11 - 3:09 PM
Member Personal Page Posts: 161 Comments: 2 Joined: 09/12/11	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
Joe Kriz	#2  Posted on 09/28/11 - 3:12 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	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.
Gmondun	#3  Posted on 09/28/11 - 3:15 PM
Member Personal Page Posts: 161 Comments: 2 Joined: 09/12/11	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.
Gmondun	#4  Posted on 09/28/11 - 3:21 PM
Member Personal Page Posts: 161 Comments: 2 Joined: 09/12/11	In fact, I think most of the water spits out around the gear case.
Derwd24	#5  Posted on 09/28/11 - 3:41 PM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	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 Dave - 1983 Outrage 22
Gmondun	#6  Posted on 09/28/11 - 9:36 PM
Member Personal Page Posts: 161 Comments: 2 Joined: 09/12/11	No I didn't! I wasn't sure what that thing was. Thank you.
Bake	#7  Posted on 09/29/11 - 4:59 AM
Member Personal Page Project Albums Posts: 902 Comments: 8 Joined: 01/30/06	yep there is the problem. Good trouble shooting right there.
Mr T	#8  Posted on 09/29/11 - 6:36 AM
Member Personal Page Posts: 230 Comments: 0 Joined: 07/07/08	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.
Gmondun	#9  Posted on 09/30/11 - 3:57 PM
Member Personal Page Posts: 161 Comments: 2 Joined: 09/12/11	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.