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home > Garmin GT8HW-TM Plastic, TM or Trolling Motor Transducer, High Wide CHIRP - 150-240kHz, 250W, 8-Pin > Garmin GT8HW-TM Plastic, TM or Trolling Motor Transducer, High Wide CHIRP - 150-240kHz, 250W, 8-Pin
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Garmin GT8HW-TM Plastic, TM or Trolling Motor Transducer, High Wide CHIRP - 150-240kHz, 250W, 8-PinUnlock Crystal Clear Views Beneath the Waves Imagine gliding through shallow bays or skinny waters, spotting fish arches that pop with precision while the bottom detail stays sharpno guesswork needed. This transducer shines in those tricky spots where traditional sonar falls short, delivering wide area coverage that helps you pinpoint baitfish schools and structure without missing a beat. Anglers chasing crappie in flooded timber or bass hugging flats
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Unlock Crystal-Clear Views Beneath the Waves

Imagine gliding through shallow bays or skinny waters, spotting fish arches that pop with precision while the bottom detail stays sharp—no guesswork needed. This transducer shines in those tricky spots where traditional sonar falls short, delivering wide-area coverage that helps you pinpoint baitfish schools and structure without missing a beat. Anglers chasing crappie in flooded timber or bass hugging flats swear by its ability to separate targets even in cluttered environments.

Built tough for real-world abuse, it handles the rigors of daily outings on everything from aluminum jon boats to bass rigs, ensuring reliable performance season after season.

The Edge of High Wide CHIRP Sonar

CHIRP technology sweeps across a broad frequency band, painting a more detailed picture than fixed-frequency sonars. Here, the high wide setup—sweeping roughly 150 to 240 kHz—excels at revealing subtle bottom contours and fish holding tight to the floor. The result? Fish IDs that stand out boldly, with minimal clutter from vegetation or debris common in shallows.

Paired with a generous beam angle reaching up to 24 degrees, you get expansive scanning without sacrificing resolution. This means more water under scrutiny per pass, ideal for trolling lures or drifting live bait where efficiency counts.

Adaptable Mounting for Any Setup

Whether you're rigging a transom for outboard-powered hunts or clamping to a trolling motor for stealthy approaches, this unit flexes to fit. It supports transom angles from flat to 70 degrees, making it a breeze to align on most hulls. The included hardware ensures a secure fit that withstands vibration and wakes, while the 20-foot cable gives you routing flexibility around batteries and displays.

Pro tip: For trolling motor use, position it just below the prop for optimal downward view, minimizing air bubbles that can fuzz your screen.

Performance Specs at a Glance

Specification Details
Frequency Range High Wide CHIRP (approx. 145-240 kHz)
Power Output 250 W
Maximum Depth Up to 800 feet (freshwater optimized)
Beam Width 24°/16° (LF/HF at -3dB)
Temperature Sensor Yes
Connection 8-pin
Cable Length 20 feet

Everything You Need to Get Started

  • Transducer unit
  • Transom mount kit
  • Trolling motor mount
  • Full mounting hardware
  • Documentation for easy setup

Backed by a solid warranty, it's ready to dive in right out of the package.

Installation and Fishing Tips from Seasoned Anglers

Dead reckoning on placement: Mount the transducer parallel to the waterline at rest, about 1/8 inch below the hull for best contact. In rough water, tweak sensitivity to cut noise while keeping those arches vivid. Pair it with compatible chartplotters for split-screen views—sonar on one side, maps on the other—to correlate fish with hotspots effortlessly.

For maintenance, rinse after saltwater trips and inspect mounts seasonally. This keeps readings crisp and extends its life through years of hard fishing.

Frequently Asked Questions

Is this transducer suitable for shallow water fishing?

Absolutely—its high wide CHIRP and wide beam excel in shallows, providing clear bottom detail and wide fish arches with superior target separation.

Can it mount on both transom and trolling motor?

Yes, it includes dedicated mounts for transom (up to 70° angles) and trolling motors, offering versatile setup options.

What kind of sonar does it use?

High wide band CHIRP traditional sonar (150-240 kHz range), delivering detailed 2D images ideal for structure and fish detection.

Does it measure water temperature?

Yes, it features a built-in temperature sensor for real-time water temp readings.

What's the maximum depth capability?

It reaches up to 800 feet, though it's optimized for shallower freshwater applications with excellent performance.

How long is the cable?

The cable measures 20 feet, providing ample length for most boat installations.

Is it compatible with 8-pin sonar units?

Designed specifically for 8-pin connections, ensuring plug-and-play compatibility with matching Garmin displays.

Garmin make products that are engineered on the inside for life on the outside. We bring GPS navigation and wearable technology to the automotive, aviation, marine, outdoor and fitness markets. We believe every day is an opportunity to innovate and a chance to beat yesterday. We offer products with essential utility, leading-edge technologies, compelling features, and exceptional ease-of-use to create clear differentiators our customers appreciate and desire.

Garmin 101240100 Attributes

  • Mounting Location: Transom Mount
  • Number Of Pins: 8 Pin
  • Depth: 400 Feet For Freshwater
  • Power Rating: 250 Watt
  • Frequency Range: 144-230 kHz High CHIRP Operating Frequency
  • Supported Angle: 0 To 70 Degree Transom Angle
  • Cable Length: 20 Feet

Garmin 101240100 Features & Benefits

  • Perfect For The Shallow Water Fishermen
  • Transom Mounted Transducer Displays Crisp, Clear And Wide Fish Arches With Excellent Target Separation Under The Boat
  • Wider Beam Width Up To 24 Degree Beam Angle Provides A Larger Coverage Area In The Water
  • 8-Pin Transducer Features High Wide Band Chirp Traditional Sonar And Has A Power Rating Of 250 Watt
  • Provides A Installation Instructions
  • Limited 2 Year Warranty

Garmin 101240100 Installation Instructions

Garmin 101240100 Warranties


GT8HW-TM Plastic, TM or Trolling Motor Transducer, High Wide CHIRP - 150-240kHz, 250W, 8-Pin

GT8HW-TM transducer is perfect for shallow water fishermen who want clear bottom definition under the boat as well as crisp, clear and wide fish arches with excellent target separation. The wider beam width - up to 24 degree beam angle - provides a larger coverage area in the water.

The 8-pin transducer features high wide band CHIRP traditional sonar (150-240 kHz) and has a power rating of 250 W. It can be mounted on the transom or a trolling motor. Follow the included installation instructions carefully to avoid damaging your boat.

"GT8HW-TM transducer is perfect for shallow water fishermen who want clear bottom definition under the boat as well as crisp, clear and wide fish arches with excellent target separation. The wider beam width \u2014 up to 24 degree beam angle \u2014 provides a larger coverage area in the water. The 8-pin transducer features high wide band CHIRP traditional sonar (145-230 kHz) and has a power rating of 250 W. It can be mounted on the transom or a trolling motor. Follow the included installation instructions carefully to avoid damaging your boat."
SKU: NVN-58958
MPN: 010-12401-00
UPC: 753759148553

Garmin GT8HW-TM Plastic, TM or Trolling Motor Transducer, High Wide CHIRP - 150-240kHz, 250W, 8-Pin

Item no : 26268836073
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