Keeldad's son here.. Yes you should be able to link your F225 to your Raymarine Axiom MFD, without needing the proprietary Yamaha CommandLink interface, Raymarine Eci-100 engine data interface module and associated connections between those two units. I can give you a parts list and install instructions/MFD calibration if you're this is something you're interested in doing., I would need the exact year and type of F225 you're working with (Not every F225 is the same, for example our F200 is a F200XB which lacks features a F200## would have, etc. You can look this up with the serial # of the OB...) Assuming your available connections are the same/similar to what I encountered with ours, I was able to bypass all the high-priced RM/Yamaha electronics (over $500 not including required cables and adapters mind you,) by utilizing a universal NMEA2000 Yamaha engine interface cable connected directly into the OB, and interfaced into our existing SeatalkNG backbone via a NMEA2000 to SeatalkNG adapter (SealktalkNG is just NMEA2000 simply pinned-out with connectors to only work with RM equipment.) The run of cable is long enough to where you'd likely need to run a Backbone extension cable to a T-Piece to link it to the Lowrance Cable fitted with the NMEA2000 to SeatalkNG adapter. All-in-all I think the total cost was less than $200 for everything. I have some pictures somewhere I can try to dig up to help when I get a chance.
