I have a 2005 Mercruiser 5.0L carburated. I talked to Mercury Marnine and they said they have nothing to convert the analog data to NMEA 2000. I did a simple search on google and came up with Actisense EMU-1 which is a converter. Has anyone used this and or have experience coverting Analog to NMEA 2000? I just purchased the Garmin 840XS and would like to use the gauge display function.