Hey guys, been a while since Ive been here. I had my 99 P3 out the other day and went to switch tanks. It ran fine before and when I switched over to the port tank, which was 3/4 it ran until the line went dry. The ball was collapsed. When I switched to the other tank the ball inflated, I pumped it up and it ran fine. Im trying to figure out whether it is the switch or something in the line to the tank. Maybe a check valve somewhere? Any advice where to start would be much appreciated. I havent had many problems with this boat in the 10 years Ive owned it.1999 Pantera III 1999 200 Opti 25P Tempest Minn Kota Maxxum 70 2 Pinpoint 7520s