Garmin B75H Bronze 20° Thru-Hull Transducer - 600W, 8-Pin

Upgrade your boating experience with a reliable thru-hull transducer that delivers crystal-clear underwater visuals, even in challenging conditions. Crafted from durable bronze, this model excels in saltwater environments, providing boaters with precise depth readings and water temperature data to navigate confidently across lakes, rivers, or open seas.

Why This Transducer Stands Out for Serious Anglers and Mariners

Designed for hulls with a 16 to 24-degree deadrise, the tilted element ensures optimal beam projection without the hassle of a fairing block. Its CHIRP technology sweeps across 130-210 kHz frequencies, revealing fish-holding structures, bait schools, and bottom contours with remarkable detail. At 600 watts of power, it punches through thermoclines and reaches depths up to 800 feet, making it ideal for offshore adventures or deep-water trolling.

• Versatile Scanning: Supports both traditional CHIRP and ClearVü scanning sonar when paired with compatible units, giving you wide coverage without blind spots.
• Robust Build: Bronze construction resists corrosion, thriving in harsh marine settings while maintaining acoustic performance over time.
• Integrated Sensors: Built-in temperature probe keeps you informed on water conditions, crucial for targeting species like tuna or walleye.
• Extended Reach: 39-foot cable offers flexible routing during installation, adapting to various vessel layouts.

Effortless Thru-Hull Installation Tips

Installing a thru-hull transducer might seem daunting, but this model's flush-mounted design simplifies the process. Select a spot forward of the propeller and keel line, free from strakes or turbulence. Drill a precise 2-inch hole, bed the unit in marine sealant, and secure it firmly. The 20-degree tilt aligns perfectly with common hull angles, minimizing air entrainment for consistent readings. Always follow safety protocols, like hauling out the boat, and test in calm water post-install to verify performance.

Pro Tip: Pair it with high-quality coaxial cable extensions if needed, and avoid running sonar cables parallel to engine wiring to prevent interference.

Detailed Technical Specifications

Real-World Advantages Over Standard Transducers

Unlike plastic alternatives, bronze housings handle electrolysis and biofouling better, extending service life in brackish or saltwater. The narrow 9-degree high-frequency beam excels at spotting individual fish amid wrecks, while the wider 15-degree low-frequency option maps vast bottom terrain. Boaters report sharper target separation compared to fixed-frequency models, especially in murky waters where every detail counts for successful outings.

Maintenance for Peak Performance

Keep it performing like new with simple routines: Rinse with fresh water after saltwater use, inspect the face for marine growth, and check O-rings annually. Avoid high-pressure washers that could damage the ceramic element. In storage, dry thoroughly to prevent moisture buildup inside the housing.