1. Introduction and Overview
The Prosport Performance 52mm Analog Clock provides a clear and precise method for tracking time within your vehicle. Designed to integrate seamlessly into various dashboards, this gauge offers easy readability and a classic aesthetic. Its robust, water-resistant construction ensures durability in diverse environments, including marine applications.
- Classic Analog Timekeeping: Offers a traditional gauge appearance for cars, trucks, and RVs.
- Water-Resistant Design: Features a sealed face and housing for protection against moisture, suitable for open-top vehicles or marine use.
- Compact 52mm (2 1/16") Size: Designed to fit standard 52mm gauge openings, allowing for versatile installation.
- Clear Readability: Equipped with a black dial, high-contrast markings, and a red pointer under a clear lens for legibility in various lighting conditions. Backlighting is included for low-light visibility.
- 12V Compatibility: Engineered for straightforward installation in 12V electrical systems.
2. What's in the Box
Upon opening your package, verify that all components are present:
- Prosport Performance 52mm Analog Clock Unit
- Wiring Harness
- External Time Setting Button
- Mounting Bracket and Hardware

3. Installation Instructions
3.1. Before You Start
- Read these instructions completely before beginning installation.
- Install the clock only when the engine is cool and the ignition is off.
- Ensure all necessary tools, materials, and parts are readily available.
- Disconnect the negative (-) battery cable before proceeding with installation.
- Verify that the chosen mounting location does not obstruct driving visibility or interfere with existing vehicle components or wiring.
- When making electrical connections, crimp all terminals securely and insulate wire splices with electrical tape to prevent short circuits.
- Always follow appropriate safety procedures during installation.
Note: Reconnecting the battery may require reprogramming your vehicle's radio, clock, or other electronic systems.
3.2. Mounting
The clock is designed for mounting in-dash or within standard 2-1/16 inch (52mm) gauge panels. Use the provided mounting bracket and hardware to secure the clock. Before final tightening, temporarily connect the wiring to ensure proper functionality.

3.3. Wiring Diagram (12V Systems)
Connect the wiring harness according to the following color code:
- Yellow Wire: Connect to a 12V Constant power source (+).
- Black Wire: Connect to Chassis Ground (-).
- Green Wire: Connect to the Set Switch (+).
- Red Wire: Connect to a 12V Ignition Switch power source (+).
- Orange Wire: Connect to the 12V Headlight Switch power source (+).
Ensure a good engine ground connection for optimal performance.
4. Operating Instructions
4.1. Setting the Time
- Press and hold the external set switch for approximately 5 seconds. The clock's pointer will begin to blink, indicating it is in setting mode.
- Release the set switch.
- To adjust the time quickly, press and hold the set switch. To make fine adjustments (small increments), toggle the set switch with short presses.
- Once the pointer is at the desired time, wait for 5 seconds without pressing the switch. The pointer will stop blinking, and the time will be set.

5. Maintenance
The Prosport Performance 52mm Analog Clock is designed for durability and requires minimal maintenance. To ensure longevity and clear visibility:
- Regularly clean the clear lens with a soft, damp cloth to remove dust and smudges. Avoid abrasive cleaners.
- Periodically inspect wiring connections to ensure they remain secure and free from corrosion.
- Ensure the clock's housing remains sealed, especially in marine or high-moisture environments, to maintain its water-resistant properties.
6. Troubleshooting
6.1. Backlight Always On
Some users have noted that the clock's backlight may remain on continuously, even when the vehicle is off. The orange wire is intended for connection to the dash light circuit to control dimming. If a constant backlight is not desired, consider the following:
- If the clock keeps time without the 'power/ignition' wire (Red), you may wire both the Red (12V Ignition) and Orange (12V Headlight Switch) wires to a switched interior light wire. This configuration allows the clock to keep time without a constant backlight during normal operation.
- Be aware that with this alternative wiring, the clock's time-setting function (which often relies on the backlight circuit being active) might only be accessible when the interior light switch is on.
6.2. General Issues
- Clock Not Functioning: Check all wiring connections (Yellow, Black, Red) for proper contact and ensure the 12V power source is active. Verify the fuse in the circuit is intact.
- Time Not Setting: Ensure the Green wire for the set switch is correctly connected and the switch itself is functional. Follow the time-setting procedure carefully.
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | PROSPORT PERFORMANCE |
| Model | 216CKBR (Clock Analog, Water Resistant) |
| Material | Glass, Plastic |
| Item Dimensions (L x W x H) | 2.25 x 2 x 2.01 inches |
| Item Weight | 10.1 ounces |
| Voltage | 12 Volts |
| Manufacturer | Prosport Performance |
8. Warranty and Support
For specific warranty information and technical support, please refer to the documentation provided with your purchase or contact Prosport Performance directly through their official website or customer service channels. Keep your purchase receipt as proof of purchase for any warranty claims.