Introduction
The Kebidumei Digital Engine Tach Hour Meter is a versatile and waterproof device designed to monitor the RPM (Revolutions Per Minute) and total operating hours of various gasoline engines. This inductive display unit is suitable for 2-stroke and 4-stroke engines found in motorcycles, ATVs, snowmobiles, lawn mowers, chainsaws, motorboats, and more. It helps users track engine usage for timely maintenance and optimal performance.

Features
- New high-quality clock/timer with large screen LCD.
- Suitable for engines running above 25,000 RPM.
- Compatible with any 2-stroke or 4-stroke gas engine.
- Hour counter reads up to 10,000 hours before resetting to zero.
- Tachometer can read up to 99,999 RPM.
- Programmable maintenance hour setting with service icons for oil changes or other services.
- Easy installation with inductive wiring.
- IP65 waterproof rating for durability in various conditions.

Setup and Installation
Follow these steps to properly install your Digital Engine Tach Hour Meter:
- Locate the Spark Plug Wire: Identify the spark plug wire on your engine.
- Wrap the Inductive Wire: Take the inductive wire from the tachometer and wrap it around the spark plug wire approximately 5 times. Ensure a snug fit to ensure accurate readings.
- Secure the Wire: Fix the wrapped wire in place using electrical tape or a cable tie to prevent it from coming loose during operation.
- Mount the Unit: Mount the tachometer unit in a convenient and visible location on your vehicle or equipment.
- Select Stroke Mode: Use the 'S1' button to select the appropriate stroke mode for your engine. Refer to the table below for options.

Stroke Mode Selection
| Mode | Description |
|---|---|
| 01 | 4 stroke in common |
| 02 | 2 stroke in common |
| 03 | Other stroke |
| 04 | RPM shut down, only display hours |
Installation Video Guide
Watch this video for a visual demonstration of the installation process on a lawnmower:
Operating Instructions
The Digital Engine Tach Hour Meter provides two primary functions: displaying total operating hours and real-time RPM.
Total Hours (TOT HOURS)
When the engine is off, the display shows the total accumulated operating hours. This value can be reset if needed (refer to the device's specific reset procedure, typically involving holding down a button). The hour counter can track up to 10,000 hours before cycling back to zero.

Real-time RPM
When the engine is running, the display automatically switches to show the real-time RPM. This allows you to monitor your engine's speed during operation.

Button Functions (S1 and S2)
- S1 Button: Used to select the engine stroke mode (as detailed in the installation section).
- S2 Button: Typically used for resetting the hour meter or navigating through settings. Refer to the specific instructions for your unit for detailed button functionality.
Maintenance
The tachometer includes a programmable maintenance reminder feature to help you keep track of essential service intervals.
Maintenance Reminder Setting
You can program specific maintenance hours into the device. When the set maintenance interval is reached, a service icon (e.g., 'SERVICE' with flashing hours) will appear on the LCD display, reminding you to perform tasks such as changing oil or replacing air filters.

Battery
The unit features a built-in battery, ensuring continuous operation and data retention. No external power source is typically required for its primary functions.

Troubleshooting
- No Display: Ensure the inductive wire is correctly wrapped around the spark plug wire and secured. The unit has a built-in battery, so check if it's active.
- Inaccurate RPM/Hours: Verify that the inductive wire is wrapped tightly enough (at least 5 turns) and that the correct engine stroke mode is selected using the S1 button.
- Maintenance Reminder Not Working: Check if the maintenance interval has been correctly programmed.
- Display Flickering: While the device is designed to be anti-flicker, ensure stable connection and proper installation.
Specifications
| Feature | Specification |
|---|---|
| Product Type | Digital Tachometer Hour Meter |
| Model Number | KBT001310 |
| Material | Plastic |
| Item Weight | 70g |
| Item Length | 73.5mm |
| Item Width | 46.7mm |
| Number Of Cylinders | 2 |
| Origin | Mainland China |
| Waterproof Rating | IP65 |
| Max RPM Reading | 99,999 RPM |
| Max Hour Reading | 10,000 Hours |

User Tips
- For optimal RPM accuracy, ensure the inductive wire is wrapped tightly and neatly around the spark plug wire.
- Regularly check the maintenance reminder to ensure your engine receives timely service, prolonging its lifespan.
- Consider using a small amount of dielectric grease on the spark plug wire connection point to enhance signal transmission, though not strictly necessary for this inductive type.
Warranty and Support
For specific warranty information and customer support, please refer to the seller's policies or contact the manufacturer directly. Keep your purchase records for any warranty claims.