Join Date: Jul 2000
Location: Lake Minnetonka (near Minneapolis, Minnesota)
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I'm sure someone will correct me if I'm wrong, but I believe most centrifugal bilge pumps need to be primed in order to work. This is accomplished by having the pump submerged in the bilge water. When the water level drops to less 1/2" or so the pump loses its prime and stops working. Also, most automatic switches shut the pump off long before the bilge is bone dry. The solution, as I see it, is to have a second, different type of pump and/or use a solid state water sensor rather than a float switch. I have the intake hose of a manual diaphram pump set in the lowest part of my shallow bilge to pick up what the electric one doesn't. It also serves as a back-up.
Chiquita - 1974 Macgregor Venture of Newport 23
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