Arrived to pick up a 2013 Helia and deliver it to the new owner. On the 12 volt panel in the port stairwell just below the nav station there is a switch labeled Sea Water Pump
. There is a distinct buzzing while it is running. It is not the same as the Air Cond Pump
on the 120 volt panel. I called the owner. He says he has no idea what it does and typically leaves it off.
Does anyone know what that switch does? And is it supposed to buzz or hum like that?