Today I installed a Rule-Mate 750 automatic bilge pump. Simple project, but sort of a pain because acess to the bilge area is limited. And the 90+ degree heat here today made for a sweaty project.
It works properly in automatic and manual mode. Tested it by filling the bilge with a garden hose. I was expecting automatic mode to drain the bilge more completely. There was still what I call a "considerable" amount of water left. The main reason I put this pump in is for our trip to Canada. Last year there was a huge downpour during the night, and my boat was tied up at the dock. I got up at 2am to turn the bilge pump on, and it ran continuously for about 15 minutes. The owner of the camp also checked on the boats at night and ran all the bilge pumps.
In manual mode, it sucked the bilge almost dry, so I know the pump is installed at the proper location. Must have something to do with how the limits are set on the float switch.
p.s. The bilge was pretty stinky, I wondered why. As I started taking the old pump out, I found two recently deceased mice. Phew!