I am replacing the water hoses on my Universal M25.
I removed the hoses and made a very nice diagram of where each hose went, and labeled each with a number. Two of those hoses connect to the raw water pump, one in and one out. What I left out of my diagram is which was in and which was out :0
I reasoned that the intake was on the bottom of the pump so I connected the bottom fitting on the pump to the thru hull for water intake. After installing all the hoses I opened the raw water thru hull fitting and started the engine. Aware that I may have deduced incorrectly which of the two fittings on the pump was the intake I watched carefully to see if water was being discharged from the stern of the boat when I started the engine. After about a minute of the engine running and no water being discharged I shut down the engine to think the issue through.
The first issue is whether I connected the seawater intake hose to the correct fitting on the pump. It is the bottom hose in this pic:
Sorry that the pic is 90 deg off in the image above. I could not figure out how to rotate it.
If the water intake port is not the lower one I screwed that up and that explains the problem. If I have connected the raw water intake to the correct fitting on the pump then there is another problem. Do you have to bleed the system of air to the pump? If so, how? Do you prime it be pouring water into the pump somehow?
I appreciate any input the group may have.
I removed the hoses and made a very nice diagram of where each hose went, and labeled each with a number. Two of those hoses connect to the raw water pump, one in and one out. What I left out of my diagram is which was in and which was out :0
I reasoned that the intake was on the bottom of the pump so I connected the bottom fitting on the pump to the thru hull for water intake. After installing all the hoses I opened the raw water thru hull fitting and started the engine. Aware that I may have deduced incorrectly which of the two fittings on the pump was the intake I watched carefully to see if water was being discharged from the stern of the boat when I started the engine. After about a minute of the engine running and no water being discharged I shut down the engine to think the issue through.
The first issue is whether I connected the seawater intake hose to the correct fitting on the pump. It is the bottom hose in this pic:
Sorry that the pic is 90 deg off in the image above. I could not figure out how to rotate it.
If the water intake port is not the lower one I screwed that up and that explains the problem. If I have connected the raw water intake to the correct fitting on the pump then there is another problem. Do you have to bleed the system of air to the pump? If so, how? Do you prime it be pouring water into the pump somehow?
I appreciate any input the group may have.
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