Garmin 741xs engine data

Recently the engine data has been cutting out on my Garmin 741xs. Sometimes it works fine. Other times the rpms freeze regardless of what the engine is doing. Other times I get no data at all. All the connections under the console look OK. Anyone have any idea where/how the unit would be connected to my Suzuki 60?

THERE IS A PLUG THAT CONNECTS THEM
HARNESS COMES FROM THE MOTOR AND CONNECTS TO THE NETWORK

www.teamcharlestonmarine.com
www.joinrfa.org
IF I RESPOND IN ALL CAPS, ITS NOT ON PURPOSE, AND I AM NOT YELLING