I don't understand how the bilge pump works on my boat. There is off, manual and auto. When I flip it to manual, it seems to just run constantly, just at a slower pace. I had some water in my bilge the other day and flipped it to manual and it really started pumping out the water. When I flipped it to auto, the water kept coming out, just slower. If I leave it on auto, it runs continuously even if there is no water in the bilge?
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