Welcome to the ultimate guide for your Garrett Ace 250. This manual ensures a smooth experience, covering features like excellent detection depth, rugged design, and ease of operation. Perfect for both beginners and experienced users.

Understanding the Components
The Garrett Ace 250 is a versatile metal detector designed for ease of use and efficiency. Its key components include the control box, which houses the electronic circuitry, and the search coil, responsible for detecting metal objects underground. The shaft connects the control box to the search coil, allowing for adjustable height to suit different users. The armrest provides comfort during extended use, while the LCD display offers essential information like target ID and depth indication. Additional features include navigation buttons for adjusting settings and a coil cable that ensures proper signal transmission. Understanding these components is crucial for optimal performance and troubleshooting. Each part plays a vital role in the detector’s functionality, making it essential to familiarize yourself with their purposes and maintenance requirements. This knowledge will help you maximize the detector’s potential and ensure longevity. By grasping the basics of these components, you’ll be better equipped to handle various detecting scenarios effectively.

Assembly and Initial Setup

Assembling the Garrett Ace 250 is straightforward and requires minimal effort. Start by unpacking the detector and ensuring all components are included, such as the control box, shaft, coil, and armrest. Next, attach the control box to the shaft using the provided screws, ensuring it is securely tightened. Adjust the shaft to your preferred height and lock it in place. The coil, which is pre-assembled, should be attached to the lower end of the shaft. Finally, adjust the armrest for comfort and ensure all connections are tight. Before use, perform a quick check to ensure proper assembly and functionality. This setup ensures the detector is ready for operation, providing optimal performance for your treasure-hunting adventures.

Operating the Garrett Ace 250
Learn to operate the Garrett Ace 250 with ease. This section covers turning the detector on/off, ground balancing, sensitivity adjustment, and utilizing search modes for optimal performance in various terrains and conditions.
4.1 Turning On/Off
To power on the Garrett Ace 250, press and hold the power button located on the control box until the device activates. You will hear a slight beep and see the LED lights illuminate, indicating the detector is ready for use. Ensure the batteries are properly installed and charged before turning on the device. To turn it off, press and hold the same power button until the lights dim and the unit powers down. Always turn off the detector when not in use to conserve battery life. If the detector does not turn on, check the battery connections or replace them if necessary. The Ace 250 features an automatic shut-off function after a period of inactivity, helping to extend battery life. Proper on/off operation ensures optimal performance and longevity of your metal detector.
4.2 Ground Balancing
Ground balancing is a critical feature of the Garrett Ace 250, allowing the detector to adjust to varying soil conditions and mineralization. This ensures accurate target detection by minimizing false signals caused by the ground itself.
To perform ground balancing, press and hold the “Ground Balance” button while pumping the search coil slowly above the ground. Release the button once the detector stabilizes, and it will automatically adjust to the ground’s mineral content.
For optimal performance, ground balancing should be done in areas with consistent soil conditions. This feature is particularly useful in highly mineralized ground, where interference can otherwise mask potential targets.
The Ace 250 also offers both automatic and manual ground balancing options, catering to different user preferences and hunting environments. Regular use of this feature enhances the detector’s efficiency and accuracy during treasure hunting.
4.3 Sensitivity Adjustment
The Garrett Ace 250 allows users to fine-tune sensitivity to optimize performance in various environments. Sensitivity adjustment is crucial for balancing detection depth and minimizing interference from ground noise or external electrical signals.
- To adjust sensitivity, locate the sensitivity knob on the control panel and turn it clockwise to increase sensitivity or counterclockwise to decrease it.
- Higher sensitivity settings improve detection depth but may cause false signals in mineralized soil or areas with high electromagnetic interference.
- Lower sensitivity settings reduce noise but may limit the detector’s ability to detect deeper targets.
- Start with a moderate sensitivity level and adjust as needed based on the search environment and target type.
Proper sensitivity adjustment ensures a more efficient and enjoyable metal detecting experience, helping users focus on genuine targets while minimizing distractions.
4.4 Search Modes
The Garrett Ace 250 offers multiple search modes to cater to different detecting scenarios, enhancing versatility and efficiency. These modes include:
- All-Metal Mode: Ideal for locating all types of metal, including ferrous and non-ferrous targets, without discrimination. This mode is perfect for relic hunting or general detecting.
- Discriminate Mode: Allows users to filter out unwanted trash targets like nails or cans, focusing on valuable items. Adjustable discrimination settings ensure customization.
- Pinpoint Mode: Provides precise target location, helping users zero in on the exact spot for recovery. This mode is essential for retrieving items quickly and accurately.
Each mode is designed to optimize performance in various environments, from beaches to fields, making the Garrett Ace 250 a versatile tool for treasure hunters and enthusiasts alike.
4.5 Discrimination
Discrimination is a key feature of the Garrett Ace 250, allowing users to differentiate between various types of metals. This feature helps eliminate unwanted signals from trash like iron, aluminum, or steel, focusing on valuable targets such as coins, jewelry, or relics. To adjust discrimination, use the control panel to select the desired mode. The detector offers multiple settings, including COIN, RELIC, and PRO modes, each optimized for specific hunting scenarios. In COIN mode, the detector ignores small iron objects, while RELIC mode is designed for older, more corroded items. PRO mode offers advanced customization, allowing users to fine-tune discrimination levels for precise target identification. Adjusting the discrimination dial enables you to filter out unwanted signals, ensuring clearer and more accurate readings. However, be cautious not to set the discrimination too high, as this may cause the detector to miss smaller or deeper targets. Experiment with different settings to find the optimal balance for your hunting environment.
4.6 Notch Filtering
The Garrett Ace 250 features a notch filtering system, allowing users to eliminate unwanted target responses. This feature is particularly useful for ignoring trash items like foil or pull-tabs while focusing on desired targets. By adjusting the notch filters, you can exclude specific ranges of conductivity, ensuring a more precise detection experience. The control panel provides easy access to notch settings, enabling you to customize your search based on the environment. For instance, in areas with high levels of ground mineralization or trash, notch filtering helps refine signals, reducing false alerts. The visual display also assists in identifying and isolating target responses, making it easier to distinguish between valuable items and debris. This feature enhances the detector’s versatility, making it suitable for various hunting conditions. Proper use of notch filtering can significantly improve detection efficiency and accuracy, ensuring a more rewarding metal detecting experience.
4.7 Audio ID
The Garrett Ace 250 features an Audio ID system, which provides distinct tones to help identify the type of metal detected. This feature enhances target recognition, allowing users to determine whether the detected object is likely to be ferrous (e.g., iron) or non-ferrous (e.g., silver, gold, or copper). The detector emits a low-pitched tone for ferrous metals and a high-pitched tone for non-ferrous metals, making it easier to decide whether to dig or ignore the target.
- High-pitched tones indicate non-ferrous metals, often associated with valuable items like coins or jewelry.
- Low-pitched tones signal ferrous metals, such as nails or scrap iron.
By adjusting the sensitivity and discrimination settings, users can optimize the Audio ID feature for better accuracy in various environments. This tool is particularly useful for beginners, as it simplifies the process of identifying potential treasures.

Interpreting Signals
Understanding the Garrett Ace 250’s signals is key to successful detecting. The detector provides clear visual and audio cues to help identify targets, including metal type and depth. Accurate interpretation ensures efficient and precise treasure hunting experiences for users of all skill levels.

5.1 Target Identification
Target identification is a key feature of the Garrett Ace 250, enabling users to distinguish between different types of metals. The detector provides clear visual and audio signals to help identify targets accurately. The LCD display shows numerical target ID, ranging from 1 to 99, with higher numbers indicating more conductive metals like silver or copper. Additionally, the detector offers tone ID, where different tones correspond to specific metal types, aiding in quick identification. The coil plays a crucial role in target detection, with its size and sensitivity adjustments allowing for precise location of objects underground. By combining these features, users can determine whether a target is likely to be trash, such as a bottle cap or a nail, or something valuable, like a coin or jewelry. This functionality makes the Ace 250 user-friendly for both novices and experienced treasure hunters, ensuring efficient and successful metal detecting experiences.
5.2 Depth Indication
The Garrett Ace 250 provides depth indication through its numeric display, helping users estimate the target’s depth underground. The detector segments depth into ranges: 0-2 inches, 2-4 inches, 4-6 inches, 6-8 inches, and 8+ inches. This feature aids in identifying shallow or deeply buried objects.
Depth accuracy depends on factors like coil size, sensitivity settings, and target size. Larger targets may provide more precise depth readings, while smaller objects might show less accuracy. Ground mineralization can also affect depth readings, requiring adjustments to settings for optimal performance.
Understanding depth indication is crucial for efficient hunting; It helps users decide whether to dig or ignore a target based on its depth. For example, shallow targets are often trash, while deeper ones might indicate valuable items. Always pinpoint the target before digging for precise recovery.
- 0-2 inches: Very shallow, often small items like coins.
- 2-4 inches: Small to medium-sized targets.
- 4-6 inches: Larger objects or deeper small items.
- 6-8 inches: Deeply buried targets.
- 8+ inches: Very deep objects, possibly large or buried long-term.
Use this feature alongside audio ID and target identification for a comprehensive hunting experience.
5.3 Audio Features
The Garrett Ace 250 is equipped with advanced audio features designed to enhance your metal detecting experience. The detector provides clear and distinct tones for different types of targets, allowing you to identify potential finds without visual confirmation. The Audio ID feature emits unique tones for various metals, helping you distinguish between valuable items and unwanted trash. Additionally, the detector includes adjustable volume control, enabling you to customize the sound to suit your environment. For privacy or noisy settings, the Ace 250 also features a 1/4-inch headphone jack, compatible with most metal detecting headphones.
Another notable feature is the low-battery alert tone, which ensures you never run out of power unexpectedly. These audio features work seamlessly with the detector’s search modes and discrimination settings, providing a comprehensive and user-friendly experience. By leveraging these audio cues, you can focus on searching efficiently and effectively, making every hunt more productive and enjoyable.
Maintenance and Care
Regular maintenance ensures your Garrett Ace 250 performs optimally. Clean the detector after each use, store it properly, and check batteries regularly. Update software, inspect for damage, and handle coils with care for longevity.
6.1 Cleaning the Detector
Regular cleaning of your Garrett Ace 250 is essential to maintain its performance and longevity. Start by using a soft, dry cloth to wipe down the entire unit, paying special attention to the control box, armrest, and coil. For stubborn dirt or debris, lightly dampen the cloth with water, but avoid harsh chemicals or abrasive cleaners, as they may damage the finish or harm electrical components.
- Avoid submerging any part of the detector in water, as it is not fully waterproof.
- Use compressed air to gently remove dust or dirt from crevices or small openings.
- Inspect the search coil regularly and clean it with a soft brush to remove dirt or debris that may interfere with detection.
- After cleaning, ensure all parts are dry before storing or using the detector again.
By following these steps, you can keep your Garrett Ace 250 in optimal condition and ensure consistent performance during your treasure-hunting adventures.
6.2 Storage Tips
Proper storage of your Garrett Ace 250 is essential to maintain its performance and longevity. Always clean the detector thoroughly with a soft cloth before storing it to remove dirt or moisture. Store the device in a dry, cool place, away from direct sunlight and extreme temperatures. Use a protective cover or case to shield it from dust and accidental damage. The coil should be stored separately to prevent bending or scratching. Avoid storing the detector in humid environments or areas prone to moisture, as this can damage the electronics. For extended storage, ensure the batteries are removed to prevent corrosion. Keep the owner’s manual and accessories in a safe, organized location. Regularly inspect the detector before use to ensure it remains in optimal condition. By following these storage tips, you can preserve your Garrett Ace 250 and ensure it remains ready for your next adventure.
6.3 Troubleshooting Common Issues
Troubleshooting the Garrett Ace 250 is essential for optimal performance. Common issues include false signals, depth inaccuracies, or sensitivity problems. If the detector fails to power on, check the battery levels and ensure proper connections. For false signals, adjust the sensitivity or ground balance. Interference from nearby devices can also cause irregularities, so try operating in a quieter environment. If depth readings are inconsistent, inspect the coil for damage or debris. Regularly cleaning the coil and ensuring it is securely attached can resolve many issues. If problems persist, perform a factory reset by turning the detector off, then on while holding the sensitivity button. This restores default settings. For persistent issues, consult the manual or contact Garrett’s customer support for assistance. Proper maintenance and regular checks can prevent many common problems, ensuring your Garrett Ace 250 operates at its best.
6.4 Battery Care
Proper battery care is essential for maintaining the performance of your Garrett Ace 250. The detector operates on 4 AA alkaline batteries, which provide reliable power for extended use. To ensure optimal performance, avoid mixing old and new batteries or using different battery types. For rechargeable batteries, always use the recommended charger and follow the manufacturer’s guidelines. Store batteries in a cool, dry place to prevent degradation. Check battery expiration dates and replace them as needed. If you notice a significant decrease in detection depth or unstable operation, it may indicate low battery levels. The detector features a low-battery indicator, ensuring you’re alerted before power runs out. Remove batteries during long periods of inactivity to prevent leakage. By following these care tips, you can extend the life of your batteries and maintain your Garrett Ace 250’s efficiency.
6.5 Coil Maintenance
Proper maintenance of the Garrett Ace 250’s coil is essential for optimal performance. Regularly inspect the coil for damage, such as cracks or dents, and clean it with a soft cloth to remove dirt or debris. Avoid using harsh chemicals, as they may damage the coil or its protective covering. Store the coil in a dry, cool place when not in use to prevent rust or corrosion. For added protection, consider using a coil cover to shield it from scratches or abrasions. If you notice a decrease in detection depth or accuracy, check the coil connection to ensure it is secure. Proper care extends the life of your coil and ensures consistent results during your treasure hunting adventures.

Tips for Optimal Performance
To maximize the effectiveness of your Garrett Ace 250, consider these expert tips. First, ensure proper ground balancing to minimize interference and enhance target detection. Adjust sensitivity based on soil conditions to avoid false signals. Experiment with search modes to suit your hunting environment, whether it’s a beach, park, or forest. Utilize the discrimination feature to filter out unwanted trash signals, focusing on valuable targets. For better accuracy, maintain a steady sweep speed and keep the coil close to the ground. Regularly clean and inspect the coil for debris, as this can impact performance. Additionally, fine-tune the notch filtering to eliminate specific unwanted frequencies. Lastly, take advantage of the Audio ID feature to identify targets through sound cues. By following these tips, you can optimize your Garrett Ace 250 for a more successful and enjoyable metal detecting experience.

Accessories
To enhance your metal detecting experience with the Garrett Ace 250, several accessories are available. A dust rain cover protects the detector from harsh weather conditions, ensuring durability. Additional coils, such as the 4×4-inch or 9×9-inch options, offer versatility for different terrains and target sizes. A coil cover is essential for safeguarding the search coil during storage or transport.
- Headphones: Improve target audio clarity, especially in noisy environments.
- Carry Bag: Conveniently transport the detector and accessories.
- Battery Kit: Ensure uninterrupted operation with extra batteries.
- Ground Balancing Kit: Customize settings for various soil types.
These accessories optimize performance and adaptability, making the Garrett Ace 250 a versatile tool for treasure hunters and enthusiasts alike.
Safety and Responsible Usage
Using the Garrett Ace 250 metal detector requires attention to safety and responsible practices. Always avoid using the device in hazardous environments, such as construction sites or areas with unstable ground. When detecting near water, ensure the coil is waterproof and avoid submerging non-waterproof components. Never use the detector near sensitive electronic equipment, as it may cause interference. Additionally, be mindful of local laws and regulations regarding metal detecting, as some areas may restrict usage or require permits. Respect private property and obtain permission before searching on private land. Avoid damaging historical or protected sites, and refrain from digging in sensitive ecological areas. Always fill in holes properly after digging to maintain the environment. Store the detector in a dry, secure location to prevent damage or unauthorized use. By following these guidelines, you ensure a safe and responsible metal detecting experience. Consult the manual for additional safety tips tailored to your device.

Warranty and Customer Support
The Garrett Ace 250 is backed by a comprehensive warranty program, ensuring protection for your investment. Garrett Electronics provides a limited warranty covering defects in materials and workmanship for a specified period. This warranty is a testament to the company’s confidence in the detector’s durability and performance.
For any inquiries or issues, Garrett offers dedicated customer support. Their team is available to assist with troubleshooting, repair services, and general questions; Additionally, the official Garrett website provides access to downloadable manuals, firmware updates, and FAQs, ensuring you have all the resources needed to maintain and optimize your detector.
Whether you’re experiencing technical difficulties or seeking advice, Garrett’s customer support is designed to provide prompt and reliable assistance. This commitment to customer satisfaction underscores Garrett’s reputation as a leader in the metal detection industry.
The Garrett Ace 250 is a versatile and powerful metal detector designed for both beginners and experienced users. With its excellent detection depth, rugged design, and ease of operation, it offers exceptional value. This guide has covered everything from assembly to advanced features like ground balancing, sensitivity adjustment, and search modes. By following the tips for optimal performance and maintaining your detector properly, you can ensure years of reliable service. Remember to always use the detector responsibly and adhere to local regulations. Whether you’re hunting for treasures or exploring history, the Garrett Ace 250 is a trusted companion for your adventures. Happy hunting!