Boat fishing is very different from shore fishing, requiring the fisherman not only to be able to control the boat, but also to "see" what is hidden under the water column. sounder It's becoming more than just a toy, it's the primary tool to find fish, to find bottoms, and to avoid hooks. But the prices of new models from top brands are often biting, leading many anglers to consider the second-hand electronics market.
Buying used equipment is always a lottery, but if you do it right, you can get a premium device for half the market value. It's important to understand that the aquatic environment is aggressive, and even short-term improper storage can put expensive electronics out of order. In this article, we'll look at the nuances to pay attention to. bazaar It was a good investment, not a waste of money.
Before we go to specific models, we need to decide on the type of boat and fishing conditions. Inflatable PVC boats are critical mobility and ease of installation, whereas for metal boats, the power of the emitter and detailing the picture at high speeds. Don't rush to buy until you have assessed your real needs.
Key parameters of choosing a sonar for a boat
When choosing sonar The first thing you should do when you're on a boat is to look at the frequency of the emitter. The standard 200 kHz is great at showing fish in standing water, but for speed and deep water, low-frequency models or scanning technologies are better at it. Many modern devices support multisonics, which is a huge plus.
Size and permit display Small screens on budget models often go blind in the sun, turning into a black spot. If you plan to fish during the day, look for IPS matrixes or screens with a high margin of brightness, even if you have to overpay for a used model of the previous generation.
The type of sensor connection deserves special attention. Wired systems are more reliable, but require transom drilling or the use of special brackets. Wireless sonars are convenient for temporary installation, but their batteries degrade over time. When buying a used wireless module, be sure to check whether the battery has changed.
⚠️ Attention: Never buy a sonar without the possibility of a test inclusion in the water. Working "dry" even for a few seconds can irrevocably damage the crystal emitter, and the seller may simply not know or hide it.
Modern models often feature GPS navigation and map downloadability. For boat fishing, having a mapploter is a huge bonus, allowing you to mark the "cool" points and return to them with a meter accuracy. Check if the device supports a map of your region and if the seller has original cables.
The market of used electronics: where to look and what to fear
Used equipment is best searched in specialized fishing forums and social media themed groups, where the chances of running into a professional dealer are lower, and the seller tends to be keen on fishing and can honestly tell the history of ownership of the device. Ads on shared boards require more careful filtering.
Beware of devices brought from regions with salty waters. Salt is the main enemy of electronics, it penetrates everywhere and causes corrosion of contacts that is not always visible externally. If the seller mentions that the sonar was used at sea or in estuaries, demand very detailed photos of the connectors and the interior of the case.
When you look at the product, look for the opening of the case, if the screws have broken slats or scratches around the joints, then the device has been opened, this may indicate an attempt to repair yourself or replace the battery, which is not always done efficiently.
- 🔍 Visual examination: Look for cracks on the body, scuffs on the screen and oxidation on the cable contacts.
- 🔌 Package: Check for all plugs, mounts and, most importantly, the original charger.
- 📦 Packaging: The presence of a native box and foam often indicates the careful attitude of the owner to the technique.
Diagnosing the condition before buying
The most important step is to check the performance, and the ideal option is to meet the seller by the pond and perform a test turn on, and if you can't, insist on turning the device on in a bucket of water, and the image should be stable, without vertical stripes, flickering or broken pixels.
Be sure to check the buttons and touch screen (if any) in older models, buttons may or may not respond to presses due to wear of rubber membranes. The sensor must respond to touches across the area, including angles where calibration problems often occur.
☑️ Checklist for sonar inspection
Pay special attention to the sensor cable. It should not have any clamps, insulation bloating, or repairs. Often, it is the cable that is the weak link, and replacing it can cost almost half the price of the used sonar itself. Touch the cable along the entire length — it should be elastic, not petrified.
⚠️ Attention: If you hear a foreign squeak or hum when you turn on the sonar, it may indicate problems with the transducer or internal electronics.
Popular models and their features
In the secondary market, three major manufacturers rule the ball: Garmin, Lowrance, and Humminbird, each with their own strengths and their own characteristic “diseases,” and understanding these nuances will help you choose exactly what you want.
Models. Garmin They're famous for their reliability and their excellent GPS navigation, but they often have problems with the readability of older generations' screens in the direct sun. Lowrance It offers perhaps the best sonar picture in its class, but its touchscreens can be less responsive at low temperatures.
| Brand | Pluses | Cons | For whom? |
|---|---|---|---|
| Garmin | Reliability, GPS. | The price of accessories | Tourists, running fishing |
| Lowrance | Image quality | Sensor fragility | Trolling, deep-sea fishing |
| Humminbird | Scanning technologies | Difficult menu | Experienced anglers |
What is CHIRP and do you need it?
CHIRP technology allows the sonar to send a continuous signal over a wide range of frequencies, which allows for a clearer separation of targets and fish. For amateur fishing, this is a great bonus, but not a must.
When selecting a specific model Humminbird You have to be prepared for a complicated menu that takes time to learn, but the brand's side-scanning and bottom-scanning technology often outperforms the competition, and if you like to dig into the settings, that's your choice.
Installation and configuration of the purchased device
After a successful purchase, it is a matter of installation. For PVC boats, the best solution is to use transom mounts that do not require drilling of the hull. Metal boats allow the sensor to be installed permanently, slamming it into the hull, which gives better sonar.
It's important to get the cable right so it doesn't get in the way of fishing and rubbing against the side. Use corrugated tubes and quality screeds. Remember to leave a small loop at the entrance to the boat hull to avoid stretching the wire when rolling.
Before final installation, lay the cable down the shortest path and secure it with paint tape. Ride the boat for a day to make sure the wire is not clamped or disturbed anywhere.
Adjusting the sounder to a particular body of water is a creative process. Automatic modes often lie in overgrown areas. Learn to manually adjust sensitivity.Sensitivity) and a range of depths to see the real picture, not digital artifacts.
Service and extension
To keep the used sonar you buy, you need to take good care of it. After every fishing trip, especially in salt water, wipe the body and sensor with a wet cloth. Do not use aggressive chemicals that can damage the protective coating of the screen.
Keep the device only in a dry place. Residual moisture inside the case can lead to condensation at temperature changes, which will cause the board to oxidize. In winter, it is better to put the sonar in the heat, allowing it to warm up before turning on.
- 💧 Moisture protection: Always cover the plugs, even if it is a little rain.
- ☀️ Sun protection: With a long parking, cover the screen with a cloth to avoid burnout of the matrix.
- 🔋 Battery: Don’t keep wireless sensors completely discharged, it kills the battery.
⚠️ Attention: Never wash the echo sounder with a high-pressure jet of water (kerkercher). Pressure can push the speaker membranes and drive water inside the sealed housing through microslits.
Frequently Asked Questions (FAQ)
Can a sea sonar be used in fresh water?
Sea sonars often have a more powerful emitter and protection from salt, and in fresh water they will work even more efficiently, showing greater depth, and the only caveat is that the sensitivity settings will have to be reduced.
How much does the used sonar lose in value?
On average, after buying in the store, the sonar loses 30-40% of the cost immediately. Used devices aged 2-3 years in good condition can be found for 50-60% of the price of a new one. Models older than 5 years cost about 30%, but the risk of failure there is much higher.
What if the screen of the sounder “blinds” in the sun?
This is a common problem with old LCD screens, and it's hard to solve the problem completely, but it's going to help you make a visor out of black plastic or use polarizing glasses. Display.
Do I need to update the firmware on the used sounder?
Definitely, yes. Manufacturers regularly release updates that improve sonar performance and correct errors. You can download fresh firmware on the manufacturer's official website. Be sure to charge the device fully before upgrading.
The big takeaway: Buying a used sonar is a great way to save money, but only if you're willing to take the time to thoroughly check the device before paying. Don't believe the words "worked yesterday," check it yourself.