Did you get it to work?
Sometimes I have to open a winterizing drain and connect a hose to push water in to fill the void in the hose. The pump just keeps trying to suck air for some reason.
I have not had the issue in years though and it was a real tough one to sort out.
Of course you didn't have shore water to do that.
They put the pumps in places you often cannot see of course but a camera might help look for any water lines that have air in them. A loose connection on the input to the pump might allow air to be sucked in and not pull the water through.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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