Same thing happened with my fuel gauge. I used a thick, gel-like household glue (I think it was called GOOP) to simply glue mine into place. I know, not the best fix, but it worked well enough for an '04 LSV.
www.louisianawakeboarding.com
2004 LSV
Perfect Pass, Integrated ballast (front, rear, middle), Wake Plate, Tower mounted bimini, Swivel board racks, Surf board rack, Tower mounted mirror, Keel guard, 4 tower speakers, 12" sub, 2 amps, transom remote, Bow filler cushion, and the list continues to grow.