I could use some help. This weekend I emptied the holding tank on my Hunter 27 and everything worked well. Thanks for the posts. However, after I returned to the dock, I powered up the meters and the tank still read full. The needle moved from empty to full so I know that it is getting power. Does anyone have any idea how to fix or track down the problem? To add to the confusion, the water tank shows empty and I know it is full because I over filled it and water leaked out around the top into the cabin!