Hi everyone! I bought a 2011 Glastron 205 GT, but the speedometer does not work. When we took it for a test drive, the gauge just went up a bit (not even 5mph), but that was it. How is this gauge getting the information? Is there an inductive paddle sensor on the back (electronic gauge)? Is it mechanical? I havent taken anything apart yet but any clues where to look for problems would be appreciated! Does anyone know???