I have a Garmin 531s and it has a 5" screen. Can you get a bigger screen or you do you have to buy a completely new unit? If so, is the transducer and the GPS antenna interchangable?
F floater1 4845 posts · Joined 2007 Add to quote Only show this user #2 · Aug 29, 2014 Yes you need a new unit the new unit should convert to the older transducer if not the make adapters