Originally Posted by Erin
That's interesting. So that means the EP20 can be updated. I would have thought it would have been the multi function display that did the calculation on fuel use. If it is successful, let us know because I might need to do this to my EP20.
I can't update now the ep20 interface because i don't have a lowrance gps with cf o sd slot. I have only the lmf400 gauge.
I must find a friend or a shop that can do the update for me.
If you want the update i can forward you the lowrance email with the new firmware.