Unlock Superior Fishfinding with Garmin GT41-THP Thru-Hull Transducers

Imagine gliding through choppy waters, spotting fish hiding near structure or schools darting off to the sides— all with razor-sharp clarity. The Garmin GT41-THP thru-hull transducer pair delivers that edge for serious anglers and boaters. Mounted directly through your hull, these stainless steel units cut through rough conditions to provide DownVü and SideVü scanning sonar alongside powerful traditional sonar. Optimized for boats with hull deadrises up to 25 degrees, they excel in delivering reliable performance whether you're trolling offshore or navigating inland waters.

What sets this pair apart? Dual transducers—one for port, one for starboard—ensure balanced coverage without compromising signal strength. The built-in temperature sensor keeps you informed on water conditions that influence fish behavior, helping you adapt your strategy on the fly.

Key Features and Performance Highlights

• DownVü/SideVü Scanning Sonar: CHIRP technology at 260/455 kHz paints detailed, photo-like images of the bottom, wrecks, and fish directly below and up to 750 feet to each side. Perfect for structure fishing in lakes or bays.
• Traditional CHIRP Sonar: 50/200 kHz frequencies punch through to 1,500 feet in saltwater, ideal for deep-water pursuits where every detail matters.
• Robust Power Output: 500W per DownVü/SideVü element (1,500W total) and 600W traditional—handles turbulent wakes and heavy seas without losing resolution.
• Stainless Steel Construction: Corrosion-resistant stems withstand harsh marine environments, ensuring longevity even in saltwater exposure.
• Fast-Response Temp Sensor: Tracks subtle water temperature shifts to pinpoint thermoclines where baitfish congregate.

Boaters report transforming their setups with this pair, turning vague sonar returns into actionable intel. In real-world use, it shines during low-light conditions or murky waters, revealing bait balls and predators that traditional sonar might miss.

Detailed Technical Specifications

Easy Installation for Lasting Results

Installing the GT41-THP pair is straightforward for DIY-savvy boat owners. Drill through the hull (following safety guidelines), secure with the included stainless steel stems, fairing blocks, and isolation hardware to minimize turbulence. The Y-cable simplifies wiring to your 12-pin Garmin display. Pro tip: Align transducers parallel to the waterline for optimal beam spread, and bed them in marine sealant for a watertight fit. Fairings reduce drag, maintaining hull speed while enhancing sonar accuracy in high-speed scenarios.

Users with fiberglass or wood hulls appreciate the vibration-dampening bushings, which keep readings steady even at planing speeds.

What's Included in the Kit

• Port transducer with stainless steel stem (12-pin)
• Starboard transducer with stainless steel stem (12-pin)
• Fairing blocks (x2)
• Isolation plate and bushings (x2)
• Mounting hardware kit
• Installation instructions
• Y-cable for seamless connectivity

Frequently Asked Questions