RL-HM006B Self Powered Digital Hour Meter | Built-in Battery, Waterproof ABS, LCD Display, For Chainsaws Lawnmowers Motorcycles ATVs Generators Tractors

What It Is

The RL-HM006B Self Powered Digital Hour Meter tracks engine run time (up to 99,999.9 hours) for gas-powered equipment without needing a wired connection to the battery. It’s designed for small engines on chainsaws, lawnmowers, motorcycles, ATVs, generators, and tractors.

Fitment & Compatibility

• Engine type: Works with any gasoline engine that has a spark plug wire. Not for diesel or electric motors.
• Mounting: The waterproof ABS housing mounts via double-sided tape or zip ties to any clean, dry surface near the spark plug.
• Wiring: The pickup wire wraps around the spark plug wire (no cutting or splicing required). Ensure the wire is within 6 inches of the plug.
• Not for: Engines with shielded spark plug wires (e.g., some modern cars or high-RFI motorcycles) or coil-on-plug systems. Test fit on a non-running engine first.

Key Things to Know

• No external power needed: The built-in battery is self-charging from engine vibration. It lasts 3–5 years in normal use, but once dead, the unit is disposable (no replaceable battery).
• Installation is simple: Wrap the pickup wire 3–5 turns around the spark plug wire, secure the meter with adhesive, and start the engine. It begins counting automatically.
• Accuracy: Good for tracking maintenance intervals (oil changes, spark plug swaps), but may be off by 1–2% due to vibration sensitivity.
• Weatherproofing: Rated IP65 for dust and water jets, but avoid prolonged submersion or pressure washing directly at the display.

Should You Buy It

Buy this if you need a cheap, no-wire hour meter for a small engine and don’t mind replacing it every few years. It’s ideal for lawnmowers, generators, or ATVs where you want to log run time for maintenance without a permanent install. Skip it if you need high precision or have a shielded spark plug system.