If it hasn't been used in a while, is it the sort of pump that needs to be primed? I haven't looked closely at mine, as I haven't had the need for it yet, but your post reminded me of a stupid manual fuel pump I felt the need to hurl obscenities at the other day.
Perhaps using an eyedropper or syringe to force water down the tube until it reaches the pump device may help?
Just a random thought, hope it might be of assistance!
_________________ 1988 Holden Commodore VL Executive
1988 Holden Commodore VL Executive (Parts Car)
1963 Ford Anglia Deluxe
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