RQ-HM016H Hour Meter, Maintenance Reminder Function, Data Storage, Lawn Mower Chainsaw, Dirt Bike, Motorcycle, Marine High Pressure Washer (red)

What It Is

This is a compact, universal hour meter that tracks engine running time and triggers a maintenance reminder (20/50/100 hours). It’s designed for small engines on lawn mowers, chainsaws, dirt bikes, motorcycles, marine engines, and pressure washers.

Fitment & Compatibility

• Mounting: No mounting hardware included – uses adhesive backing or zip ties. Works on any clean, flat surface (engine shroud, frame, handlebars).
• Wiring: Connects to spark plug wire (inductive pickup) – no direct electrical connection needed. Fits spark plug wires from 5mm to 8mm diameter.
• Battery: Built-in CR2032 (non-replaceable) – unit is sealed. No external power required.
• Not compatible with: Diesel engines, battery-only equipment (no spark plug), or machines with shielded spark plug leads (e.g., some modern outboards). Check that your engine has a visible spark plug wire.

Key Things to Know

• Installation: Simple – wrap the pickup wire around the spark plug wire (1-2 turns), secure with included tie. No tools needed.
• Accuracy: Works on 2-stroke and 4-stroke engines. May not register on very low-RPM or intermittent ignition systems.
• Data storage: Keeps hours/memory when battery dies (non-volatile memory). But once battery is dead (approx. 3-5 years), the unit must be replaced.
• Backlight: Red LED backlight – bright enough for dark sheds, but not for direct sunlight reading.

Should You Buy It

At $3.40, it’s a cheap, no-fuss way to track engine hours on small equipment that lacks a built-in meter. Ideal for DIYers who want to stay on top of oil changes or spark plug replacements. Skip it if you need a waterproof unit (IP54 only – splash-resistant, not submersible) or want a replaceable battery.