Just picked up a tournament blue water 2000 with a etec 200ho on the back. It has a garmin 750s combo on it. Problem is, i cant seem to get the speedo working, fuel remaining, km/litre etc. I do get speed and fuel flow etc showing on the garmin but the the icommand. Seems that anything that requires GPS data for it to calculate it doesnt work. Just get the 4 dashes showing it has no signal for that data on the gauge. I have had a look at the NMEA 2k network setup and looks like the garmin and 2 gauges are all hooked together but there is no stand alone GPS antenna. On my old boat (which was also a 150 etec setup) the GPS data ran off the HDS10 and did not require a separate GPS antenna for the gauges.
Does anyone have a similar setup with the icommands / garmin 750s working 100% without a separate antenna. Im really hoping i dont have to fork out $300 for a GPS antenna.