Humminbird XTH-9-20-P Plastic Thru Hull Transducer
Humminbird XTH-9-20-P Plastic Thru Hull Transducer — Product description
Discover Superior Underwater Imaging with the Humminbird Plastic Thru-Hull Transducer
Engineered for serious anglers and boaters navigating larger vessels or those equipped with inboard motors, this plastic thru-hull transducer delivers reliable sonar performance where traditional transom-mounted options fall short. By mounting directly through the hull, it minimizes interference from motor wash or prop turbulence, providing clearer fish arches, sharper bottom contours, and precise depth readings even at higher speeds.
Unlike surface-mounted alternatives, this design integrates seamlessly below the waterline for a streamlined profile that reduces drag. Ideal for offshore adventures or competitive fishing tournaments, it captures detailed sonar data in challenging conditions, helping you locate structure, baitfish schools, and trophy catches with confidence.
Key Features and Technical Specs
- Beam Coverage: Single or dual beam configuration with 20° and 60° coverage angles, balancing narrow precision for deep water with wide sweeps for shallow coverage.
- Frequency Options: Operates at 200 kHz and 83 kHz, offering versatility for various water depths—from inland lakes to coastal zones.
- Compact Dimensions: Measures 3.9 inches long, 2.5 inches wide, and 1.16 inches deep, with a 1-inch diameter shaft for straightforward hull integration.
- Material Advantage: Durable plastic construction resists corrosion in both freshwater and saltwater environments, providing longevity without the weight penalty of metal housings.
These specs ensure consistent signal transmission through fiberglass hulls up to moderate thicknesses, making it a go-to choice for many mid-sized cruisers and sportfishing boats.
Installation Essentials for Optimal Performance
Installing a thru-hull transducer demands precision to avoid water ingress and signal distortion. Select a forward-facing hull location below the waterline, away from strakes or thru-hulls that could create bubbles. A custom fairing block—shaped to match your hull's deadrise angle—directs water flow smoothly over the face, eliminating air pockets for pristine sonar returns.
Professionals often recommend dead reckoning during trials: mark the boat's path in open water and verify cone coverage aligns perfectly. This setup shines on displacement hulls, delivering interference-free imaging that transom units simply can't match at planing speeds.
Pro Tip: Pair with high-quality marine sealant and backing blocks for a bombproof seal that withstands years of pounding waves.
Why Choose Plastic Thru-Hull Over Other Mounts?
| Mount Type | Best For | Pros | Cons |
|---|---|---|---|
| Plastic Thru-Hull | Large boats, inboards | Clean signals at speed, low drag, corrosion-resistant | Requires hull modification |
| Transom Mount | Small outboards, trailered boats | Easy DIY install | Aeration issues at speed |
| Bronze Thru-Hull | Thicker hulls, commercial use | Stronger penetration | Heavier, pricier |
Plastic models excel in recreational setups, offering a lightweight, cost-effective path to pro-level sonar without compromising on durability or clarity.
Seamless Integration with Humminbird Units
This transducer pairs effortlessly with a wide array of legacy and portable Humminbird fish finders, from combo units like the 767 and 787 series to Matrix models and PiranhaMAX portables. Whether you're running a compact 141c or a full-featured 595c Combo, it unlocks dual-beam capabilities for enhanced target separation.
Check your unit's connector type for plug-and-play simplicity—most require no adapters, keeping wiring clean and clutter-free in tight console spaces.
Long-Term Care for Peak Sonar Reliability
Regular hull cleaning prevents marine growth from fouling the face, which can scatter sonar pulses. During haul-outs, inspect the fairing for cracks and O-rings for compression set. In saltwater, annual freshwater rinses combat salt buildup, preserving sensitivity season after season.
Winter storage tip: Remove and dry-store in a protective bag to dodge freeze damage in cold climates.
Frequently Asked Questions
What types of boats is this plastic thru-hull transducer best suited for?
It's perfect for larger boats with inboard engines or deep-V hulls where transom mounts suffer from cavitation. Avoid on trailered boats due to the protruding design.
Does it work in both freshwater and saltwater?
Yes, the plastic housing resists corrosion effectively in both environments, though frequent rinsing in saltwater extends lifespan.
What's the difference between 83 kHz and 200 kHz frequencies?
83 kHz offers wider coverage for shallow water and searching large areas, while 200 kHz provides finer detail and better resolution in deeper scenarios.
Do I need a fairing block for installation?
Absolutely—it's crucial for aligning the transducer perpendicular to the water flow and preventing air entrainment at speed.
Can this transducer be used with portable Humminbird units?
Yes, compatible models like PiranhaMAX portables support it, enabling thru-hull performance on temporary setups.
How do I know if my hull is compatible?
Suitable for fiberglass hulls; measure thickness (typically up to 1-1.5 inches) and ensure a flat mounting area can be faired.
Plastic Thru-Hull Transducers are for large boats and for boats with in-board motors that make typical Transom Mount Transducers ineffective. They are not recommended for trailered boats as the transducer is not flush with the hull. Plastic Thru-Hull Transducers require that a hole be drilled in the hull and the shaping of a fairing block. Professional installation is recommended. Bronze Thru-Hull Transducers are an alternative to Plastic Thru-Hull Transducers.
Description: Single/Dual Beam, 20/60 Degree, 200/83 kHz transducer. 3.9"L X 2.5"W X 1.16"D. Shaft: 1.0" Diameter
WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
The Humminbird sensor XTH 9 20 P for ocean kayaking and fishing kayaking is a plastic through-hull sensor that fits the special groove on the bottom of most models of Ocean...
SKU: NVN-28239
MPN: 710167-1
UPC: 082324505829
Technical specifications
| Brand | Humminbird |
| Model | Humminbird XTH-9-20-P Plastic Thru Hull Transducer |
| SKU / MFR# | 28239 |
Set product metafields under specs.* to populate this table.
Frequently asked questions
No questions yet. Got one? Drop us a line.
