1852086 MKR-MDI-2 Sonar Adapter Cable for Hummingbird Helix-7 G3 G3N G4 G4N Fish Finder. 1852086 MKR MDI-2 HB Helix-7 Adapter Cable. Adapter connects your Humminbird HELIX 7 G3 or G3N fish finder on your trolling motor.You'll be able to scan deeper and wider without sacrificing clarity.
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