I have a manuel bilge pump in the Comp this last weekend when i turned it on i could hear it running and feel it but no water was coming out of the boat. I tried wiggling wires and clearing anything down there that could clog it but nothing. Tried an hour later or so and it pumped all the water out, as the day went on again it was on and running but not pumping anything. Does anyone have an ideal what could be causing it to only pump water out certain times and not others.