rockb
Petty Officer 2nd Class
- Joined
- Dec 31, 2009
- Messages
- 113
2009 Mercury Scorpion 350 Water pump not pumping.
To run on the trailer I remove the top of the strainer and put the hose in the top. Normally I just leave the through hull open and let the extra water flow out the bottom. I have never had a problem with this in the past.
I just changed the impeller. Upon initial start up the pump was not pumping at all.
I took the pump off again and verified (by looking in the input and output ports) that when I spin the pulley the impeller is turning.
Then I put the pump back on and closed the through hull and turned the water hose on. The strainer fills and starts overflowing into the bilge. I fired up the engine and and the water never stops overflowing from the strainer. So I put my hand over the strainer to basically cap it off as best I can and water starts shooting out in between my fingers and then stops. The water starts flowing through the pump. Then it squirts out, then flows through the pump, and the cycle continues. I remove my hand and it continues flowing out of the strainer and a little while later the wife indicates that barely any water is coming out the exhaust (Temp is at 160). I cover the strainer and water starts going through the pump, cycle continues) and the temp drops to 153.
Is this normal and I never noticed it before because the excess water is normally flowing out the bottom of the boat or is there an issue?
Motor is a 2009 Mercury Black Scorpion 350 EFI. Pump is a 862914C. I was not positive about the impeller but from what I could come up with online it looked like a 47-862232A. I compared it to the one I took out and it looked like the same part to me.
To run on the trailer I remove the top of the strainer and put the hose in the top. Normally I just leave the through hull open and let the extra water flow out the bottom. I have never had a problem with this in the past.
I just changed the impeller. Upon initial start up the pump was not pumping at all.
I took the pump off again and verified (by looking in the input and output ports) that when I spin the pulley the impeller is turning.
Then I put the pump back on and closed the through hull and turned the water hose on. The strainer fills and starts overflowing into the bilge. I fired up the engine and and the water never stops overflowing from the strainer. So I put my hand over the strainer to basically cap it off as best I can and water starts shooting out in between my fingers and then stops. The water starts flowing through the pump. Then it squirts out, then flows through the pump, and the cycle continues. I remove my hand and it continues flowing out of the strainer and a little while later the wife indicates that barely any water is coming out the exhaust (Temp is at 160). I cover the strainer and water starts going through the pump, cycle continues) and the temp drops to 153.
Is this normal and I never noticed it before because the excess water is normally flowing out the bottom of the boat or is there an issue?
Motor is a 2009 Mercury Black Scorpion 350 EFI. Pump is a 862914C. I was not positive about the impeller but from what I could come up with online it looked like a 47-862232A. I compared it to the one I took out and it looked like the same part to me.