I may be dumb as I am new to 4-Tec but i needed some advice. Even when i have the boat out of water with no water coming out of the bilge and the power has been turned off , I can hear something running. When I turn the bilge on and off the sound goes away but starts within a second as if there is bypass to the power knob and the bilge pump or something in the boat is still running. It does not happen all the time. My boat does stay on a incline ramp about 60 degrees or so. Is this normal ? Thanks for any help