Discover Reliable Depth and Temperature Sensing for Your Boat

Equip your vessel with the Garmin B117 Bronze Thru-Hull Depth/Temp transducer, a robust solution designed for serious boaters who demand precision on the water. This 8-pin model excels in delivering accurate depth readings up to 1,200 feet and real-time water temperature data, helping you navigate shallow waters, track fish, and monitor conditions with confidence. Crafted from durable bronze, it's optimized for fiberglass and wood hulls, ensuring seamless performance even at higher speeds without compromising on clarity or reliability.

Unlike basic transducers that falter in varied conditions, the B117's dual-frequency operation (50/200 kHz) provides versatile beamwidths—45 degrees at 50 kHz for wide coverage and a focused 12 degrees at 200 kHz for pinpoint detail. Whether you're trolling for trophy fish or charting unfamiliar routes, this thru-hull mount offers the edge you need for safer, more productive outings.

Key Specifications That Matter on the Water

• Mounting Style: Thru-hull with a 2-inch shaft, perfect for clean, permanent installations on deadrise angles from 0 to 7 degrees.
• Power Output: 600 watts for strong signal penetration in deeper waters.
• Frequency Options: Switchable 50/200 kHz to match your fishing or navigation needs.
• Depth Capability: Reliable readings from 800 to 1,200 feet, ideal for offshore adventures.
• Cable Length: 33 feet gives flexibility for routing to your Garmin display.
• Bonus Sensor: Integrated temperature probe for tracking water conditions that affect fish behavior.

These specs aren't just numbers—they translate to real-world advantages like reduced noise at speed and sharper bottom contours for better structure identification.

Why Boaters Trust the Garmin B117 for Everyday Use

The B117 stands out in the crowded marine electronics market because it balances power, durability, and ease of integration. Its narrow stem design minimizes drag, maintaining your boat's hull speed while capturing crisp sonar returns. Boaters report exceptional performance in choppy seas, where lesser units might lose bottom lock.

Ideal for center console boats, cabin cruisers, and wood-hulled classics, this transducer pairs effortlessly with popular Garmin fishfinders and chartplotters. It supports high-speed operation, making it a favorite for tournament anglers who can't afford signal dropouts during critical moments.

• High-speed stability keeps readings steady as you push the throttle.
• Bronze construction resists corrosion in saltwater environments.
• Simple thru-hull install preserves your boat's aesthetics and waterproof integrity.
• Versatile for both recreational and commercial marine applications.

Smart Installation Tips from Seasoned Installers

Getting the most from your B117 starts with proper placement. Aim for a spot forward of the propellers, away from strakes or thru-hulls that could interfere with the beam. The 0-7 degree deadrise compatibility means it fits most planing hulls without fairing blocks.

Follow these pro tips:

1. Drill a precise hole using the included template, sealing with marine-grade sealant for a watertight fit.
2. Route the 33-foot cable neatly, avoiding heat sources and sharp edges.
3. Test at idle and planing speeds to fine-tune your Garmin unit's settings for optimal gain and sensitivity.
4. For 6-pin Garmin sounders, grab the matching adapter to bridge the connection seamlessly.

Skip metal hulls—this bronze beauty shines on fiberglass and wood. Careful setup ensures years of trouble-free service.

Compatibility and Real-World Performance

Designed for Garmin's ecosystem, the 8-pin connector plugs right into compatible echoMAP, GPSMAP, and STRIKER series units. It enhances CHIRP capabilities on supported models, delivering hyper-detailed images of wrecks, drop-offs, and bait schools.

Users love how it cuts through thermoclines, revealing suspended fish that single-frequency setups miss. Pair it with your existing Garmin network for a unified display of depth, temp, speed, and more—transforming your helm into a command center.

Frequently Asked Questions