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Garmin Power/Data Cable f/Fishfiner 300C & 400C & GPSMAP® 400 & 500 SeriesPower Data Transducer, 19 pin, Replacement, For Sounders Keep your Garmin fishfinder or chartplotter running smoothly on the water with this essential power and data cable. Designed specifically for marine environments, it delivers reliable power while enabling seamless data connections between your device and power source or other accessories. Anglers and boaters trust it to handle the rigors of saltwater exposure, vibrations from rough seas, and
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Power/Data/Transducer, 19-pin, Replacement, For Sounders

Keep your Garmin fishfinder or chartplotter running smoothly on the water with this essential power and data cable. Designed specifically for marine environments, it delivers reliable power while enabling seamless data connections between your device and power source or other accessories. Anglers and boaters trust it to handle the rigors of saltwater exposure, vibrations from rough seas, and constant use during long fishing trips.

Why This Cable Makes a Difference for Your Setup

Fishing electronics demand uninterrupted power to capture those critical sonar readings or GPS waypoints. A faulty cable can lead to dropped signals, inaccurate depth readings, or total blackouts at the worst moments—like when a big one is on the line. This cable steps in as a robust replacement or upgrade, featuring durable construction that resists corrosion and fraying. Its multi-purpose design handles both powering your unit and transferring data, simplifying your boat's wiring and reducing clutter in tight console spaces.

Key Benefits for Everyday Boaters

  • Stable Performance: Ensures consistent voltage delivery, preventing glitches in fishfinding or navigation.
  • Marine-Grade Durability: Built to withstand humidity, splashes, and UV exposure for seasons of reliable service.
  • Easy Integration: Plugs directly into your compatible Garmin model, no adapters needed.
  • Versatile Use: Powers standalone fishfinders or supports data links to transducers and external displays.

Perfect Fit for Your Garmin Gear

This cable pairs effortlessly with select Garmin models popular among freshwater and offshore enthusiasts. It's tailored for units that thrive on clear water scans and precise positioning, making it a go-to for kayak anglers, bass boats, and center consoles alike. Whether you're replacing a worn-out original or outfitting a new install, it restores full functionality without compatibility headaches.

Installation Tips for Quick Setup

Getting this cable up and running takes minutes with basic tools. Start by powering down your device and disconnecting the old cable. Match the connectors—Garmin's proprietary plugs ensure a secure, waterproof fit. Route the cable away from sharp edges or hot engine parts, using zip ties for a clean look. Test the connection on the water: fire up your fishfinder and watch for instant power-up and responsive sonar. Pro tip: Apply dielectric grease to contacts for extra protection against moisture in harsh conditions.

Common Troubleshooting

  • Intermittent power? Check for loose connections or battery corrosion.
  • No data flow? Verify transducer plugs are seated fully.
  • Overheating? Ensure adequate airflow around fused connections.

Maintaining Peak Performance Over Time

Extend the life of your cable by rinsing it with fresh water after saltwater trips and inspecting for wear annually. Store your gear in a dry compartment during off-seasons. Paired with Garmin's ecosystem, it supports software updates that keep your fishfinder's features sharp, from CHIRP sonar enhancements to waypoint sharing.

Frequently Asked Questions

Which Garmin fishfinders and chartplotters work with this power/data cable?

It's compatible with Fishfinder 300C, Fishfinder 400C, GPSMAP 400 Series, and GPSMAP 500 Series units. Ideal for these reliable marine electronics.

Can I use this cable with Garmin chartplotters?

No, this cable is designed for specific fishfinders and sounders in the 400 and 500 series, not chartplotters.

Does the cable support both power and data transfer?

Yes, it provides both reliable power supply and data connectivity, perfect for linking to transducers or accessories.

Is this cable suitable for saltwater fishing environments?

Absolutely, its rugged build resists corrosion and moisture, making it a solid choice for offshore and inshore boating.

How do I know if I need to replace my current power cable?

Look for signs like flickering screens, intermittent sonar loss, frayed wires, or poor connections after cleaning.

What color is the Garmin power/data cable?

It's black, blending seamlessly with most boat consoles and electronics setups.

Will this cable work as an extension for my Garmin unit?

It's a direct replacement cable, not an extender. For longer runs, consider Garmin's official extension options.

Power/Data Cable

Connect or poer your fishfinders and sounders with this power/data cable.

Compatible Devices:
  • Fishfinder 300C
  • Fishfinder 400C
  • GPSMAP® 400 Series
  • GPSMAP® 500 Series


Power/data cables for Garmin 400 and 500 series. Use this power cord/data cord with 400 and 500 series Garmin fish finder and echo sounders.
SKU: NVN-30668
MPN: 010-10918-00
UPC: 753759067427

Garmin Power/Data Cable f/Fishfiner 300C & 400C & GPSMAP® 400 & 500 Series

Item no : 48021957885
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