Brucey80

Thanks for you help lads, will order the interface cable and see how I go!

There doesn’t seem to be a NMEA outlet on the back of the gauges. The cables behind the gauges are an absolute mess with all the joins it goes to. I am guessing that is just the Yamaha command link? If I take the Yamaha interface cable from the outboard connection (I believe this is the blue and white connection that just has a capping plug inserted into it?) to the NMEA 2000 backbone bang in a T piece. This should in theory connect my outboard my sounder? 

No it is not currently, the only connection from the outboard goes directly to the gauges

All of the interface cables I have found say they are compatible with every model from 50hp onwards but then they skip 100hp

Yes have be a Nmea 2000 backbone, the gauges are just yamaha gauges I’m not sure if they are command link

Hi, wanting to connect a yamaha F100 to a simrad NSS9 evo 3 to read all gauges. Any help is greatly appreciated