Have duel 8212 Garmin, but sonar on one unit not responding .
Reelin in the Years Member Joined Nov 15, 2017 Messages 18 Reaction score 1 Points 1 Age 67 Location Fernandina Beach , Fla Model Freedom 307 Sep 24, 2018 #1 Have duel 8212 Garmin, but sonar on one unit not responding .
