Garmin B175H Bronze 20° Thru-Hull Transducer - 1kW, 8-Pin

Upgrade your marine sonar setup with a transducer designed for serious anglers and boaters who demand precision in challenging waters. This thru-hull model delivers exceptional clarity across a wide frequency range, capturing fine details from baitfish schools to underwater structures even at extreme depths. Its robust bronze construction withstands harsh saltwater environments, while the innovative design simplifies installation on boats with varying hull shapes.

Key Performance Advantages

Engineered for high-power operation, this unit pushes 1kW of sonar energy to scan up to 3,000 feet below the surface. The High CHIRP technology operates between 130-210 kHz, producing narrow beam widths of 6-10 degrees for razor-sharp images. Whether you're chasing trophy fish offshore or navigating rocky bottoms, the focused beam minimizes clutter and maximizes target separation.

• Deep Water Capability: Reliable performance down to 3,000 feet, ideal for bluewater adventures.
• Integrated Temperature Sensor: Provides real-time water temp data alongside depth readings for better fishing decisions.
• Narrow Beam Focus: 6-10 degree coverage excels at spotting wrecks, ledges, and schools in deep scenarios.

Effortless Hull Integration

One of the standout features is the 20-degree tilted element inside a low-profile bronze housing. This setup protrudes less than 1/4 inch beyond the hull, making it trailer-friendly—no more worries about rollers or bunks causing damage. It supports deadrise angles from 16 to 24 degrees, eliminating the need for custom fairing blocks on most fiberglass or wooden hulls. The 39-foot cable gives plenty of routing flexibility during install.

Boaters with sloped hulls appreciate how the pre-tilted ceramic aligns the beam perpendicular to the waterline, ensuring optimal signal return without complex adjustments. This means cleaner, more accurate readings right out of the box.

Built for Durability in Saltwater

Bronze thru-hull transducers like this one are a go-to for saltwater applications due to their corrosion resistance. The flush-mount design reduces drag and vulnerability to marine growth, keeping your sonar performing consistently season after season. Pair it with compatible chartplotters for CHIRP-enhanced fishing modes that reveal fish-holding sweet spots others might miss.

In real-world use, users report superior bottom tracking in rough seas compared to in-hull or transom-mount alternatives, thanks to the direct water path and high-power output.

Simple Installation Insights

Mounting is straightforward for DIY-savvy boat owners. Drill a precise hole matching the 3-3/4 inch shaft, secure the housing with the included hardware, and route the 8-pin connector to your display unit. Always bed the transducer in marine sealant to prevent leaks, and position it forward of props and strakes for interference-free operation. Comprehensive instructions guide you through every step, minimizing downtime.

Maintenance for Long-Term Reliability

To keep it running at peak efficiency, periodically inspect for fouling and clean with a soft brush and mild cleaner. Avoid high-pressure washers that could damage the face. In cold climates, winterize by flushing with antifreeze. Proper care extends its lifespan, ensuring years of dependable service on your vessel.