Be sure to watch PART 1 "Fox Marine Engine gateways to Garmin 8612 rev1" it is the original as it will give you a good knowledge of the base system I put in originally.    • Fox Marine Engine gateways to Garmin ...  

On my 1999 Carver 406 with twin 454 Mercury engines, I installed FOX Marines MEFI-3 Engine Gateways. As with most things in life, I needed to modify my NEMA 2000 Network to use two power supplies vs. using one power supply to accommodate the MEFI-3 engine gateways for my daily usage of a portion (Fusion Radio) of my network. The links to everything in my video are below. Hope you enjoy the video and maybe learn something or affirm knowledge. Have a great day and happy boating.

New parts used here are:
NMEA 2000® Power Isolator
https://www.garmin.com/en-US/p/74432

NMEA 2000® T-connector
https://www.garmin.com/en-US/p/13372/...

NMEA 2000® Power Cable
https://www.garmin.com/en-US/p/13373/...