Garmin B75M Bronze 20° Thru-Hull Transducer - 600W, 8-Pin
Garmin B75M Bronze 20° Thru-Hull Transducer - 600W, 8-Pin — Product description
Discover Superior Underwater Clarity with the Garmin B75M Bronze Thru-Hull Transducer
Upgrade your boating experience with a transducer that delivers pinpoint accuracy beneath the waves. Designed for serious anglers and navigators, this bronze thru-hull model with a 20-degree tilted element mounts seamlessly through your hull, adapting to deadrise angles between 16 and 24 degrees. No fairing block required—just clean installation and immediate access to both traditional CHIRP and Spread Spectrum sonar scanning when paired with compatible Garmin units.
What sets this apart? Its broadband capabilities (80-130 kHz) combined with 600W power punch through murky waters to reveal fish-holding structures, bait schools, and bottom contours up to 900 feet deep. The integrated temperature sensor adds another layer of insight, helping you track water conditions that influence fish behavior. With a sturdy 39-foot cable and 8-pin connector, it's built for reliable integration into your Garmin marine network.
Key Performance Specs at a Glance
| Frequency (kHz) | Power | Beam Width (° LF/HF) | Max Depth (ft) | Sensors | Pins | Deadrise Support |
|---|---|---|---|---|---|---|
| 80-130 | 600W | 24° / 16° | 900 | Depth + Temp | 8 | 16-24° |
This spec sheet isn't just numbers—it's the foundation for exceptional target separation and coverage. The wider low-frequency beam excels at scanning broad areas for wrecks or drop-offs, while the narrower high-frequency beam hones in on individual fish with crystal clarity.
Why Bronze Construction Matters for Your Vessel
Bronze isn't chosen lightly. This corrosion-resistant material thrives in saltwater environments, maintaining peak performance season after season. The flush-mounted housing with a 2-inch shaft ensures minimal drag, preserving your boat's speed and fuel efficiency. For vessels with varying hull shapes, the 20-degree tilt eliminates the guesswork, aligning the beam perpendicular to the waterline for optimal returns without additional hardware.
Effortless Installation and Compatibility
Setting up this thru-hull transducer is straightforward for DIY boaters or pros. Drill a precise hole matching your hull's deadrise, secure the bronze housing with the included hardware, and route the 39-foot cable to your Garmin display. Detailed instructions guide you every step, covering sealant application to prevent leaks and proper wiring for 8-pin Garmin sounders.
It's a perfect match for Garmin's ecosystem, supporting advanced features like CHIRP sonar on black box modules or all-in-one chartplotters. Users often pair it with high-end units for side/down imaging hybrids, but it shines solo for basic depth and temp readouts. Pro tip: Position it forward of props and struts to avoid interference—ideal placement often yields the sharpest images during trolling or drifting.
Real-World Applications: From Offshore Fishing to Coastal Cruising
Anglers chasing trophy species in deep water love how this transducer's 600W power cuts through thermoclines, spotting suspended walleye or tuna amid bait balls. Coastal cruisers rely on its temperature data to navigate thermal breaks where predators lurk. Even recreational boaters appreciate the reliable bottom tracking for anchoring in unfamiliar bays.
In practice, expect superior performance over cheaper plastic transoms: tighter beam focus means fewer false readings from plankton or debris. Boaters report consistent 900-foot depths in clear conditions, dropping slightly in turbid water but still outperforming narrower-band alternatives.
Maintenance Tips for Longevity
- Clean regularly: Wipe the face with a soft cloth and marine-safe cleaner to remove growth—fouling can degrade signals by 20-30%.
- Winterize: Flush with freshwater if trailered, and inspect the O-ring seal annually.
- Monitor cable: Avoid chafing near bilge pumps; secure runs with zip ties.
- Software sync: Update your Garmin firmware for the latest CHIRP algorithms, enhancing resolution.
With proper care, this unit delivers years of trouble-free service, backed by Garmin's commitment to marine reliability.
Frequently Asked Questions
What hull types is the Garmin B75M Bronze Thru-Hull Transducer best suited for?
It's optimized for hulls with 16 to 24-degree deadrise angles, common on many planing hulls like center consoles and sportfishers. The 20-degree internal tilt ensures proper beam alignment without a fairing.
Does this transducer support CHIRP sonar?
Yes, its broadband 80-130 kHz range enables both traditional CHIRP and Spread Spectrum scanning on compatible Garmin black box modules, delivering versatile frequency sweeps for varied water conditions.
What's the maximum depth capability?
Up to 900 feet in ideal conditions, thanks to 600W RMS power. Real-world performance varies with water clarity, boat speed, and bottom type.
Is a temperature sensor included?
Absolutely—it provides accurate surface water temperature readings, crucial for locating fish in stratified waters or tracking currents.
How do I install this thru-hull transducer?
Follow the included instructions: Select a forward hull location away from turbulence, drill the hole, bed the housing in sealant, tighten the nut, and connect the 8-pin cable. Dry-fit first to confirm deadrise match.
Will it work with my existing Garmin fishfinder?
It connects via 8-pin to most Garmin marine chartplotters and sounders supporting external transducers. Check your model's sonar compatibility for CHIRP features.
Why choose bronze over plastic for a thru-hull mount?
Bronze offers superior durability and corrosion resistance in saltwater, with better acoustic properties for stronger signal transmission compared to plastic housings.
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 101163622 Attributes
- Mounting Location: Thru-Hull Mount
- Number Of Pins: 8 Pin
- Depth: 900 Feet
- Power Rating: 600 Watt
- Frequency Range: 80-130 kHz
- Supported Angle: 16 To 24 Degree Deadrise
- Cable Length: 39 Feet
Garmin 101163622 Features & Benefits
- Bronze Thru-Hull Mount Transducer Is Designed To Allow Both Traditional And Spread Spectrum Scanning When Used With A Compatible Sonar Like The GSD ™ 26
- 600 Watt 8-Pin Transducer Has A Depth Of 900 Feet
- Transducer Kit Comes With Installation Instructions
- Transducer Supports A 16 To 24 Degree Deadrise
- Limited 1 Year Warranty
Garmin 101163622 Warranties
Airmar B75M
w/20° Tilt
600W
Flush-mounted bronze housing,tilted element inside the transducer accommodates all hull deadrises and eliminates the need for a fairing block.
This broadband transducer is designed to allow both traditional and Spread Spectrum scanning when used with a compatible sonar like the GSD 26. It features a bronze, thru-hull mount design with 20 degree tilt and provides both depth and temperature data to your Garmin Marine Network
Max Depth - 800'
Suppoarted Deadrise/Transom Angles - 16-24° Deadrise
Airmar B75M w / 20 Tilt 600W flush-mounted bronze housing, the tilting element inside the transducer can accommodate all hull instability, and does not require a fairing. This ...
SKU: NVN-47878
MPN: 010-11636-22
UPC: 753759972035
Technical specifications
| Brand | Garmin |
| Model | Garmin B75M Bronze 20° Thru-Hull Transducer - 600W, 8-Pin |
| SKU / MFR# | 47878 |
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