NR-HM038AD AC/DC 5V to 277V,Snap-in Digital LCD Hour Meter Kit,Initial Hours Settable,Resettable Partial Running Hours,Built-in Battery,Waterproof,Use for ZTR Lawn Mower Tractor Generator

What It Is

This is a snap-in digital LCD hour meter that tracks total engine run time and partial hours. It works on any 5V to 277V AC or DC engine—common for ZTR mowers, tractors, generators, and other small engines.

Fitment & Compatibility

• Voltage range: 5V–277V AC/DC. Works with any gas, diesel, or electric engine in that range. No special adapter needed.
• Mounting: Snap-in panel mount. Requires a 1.125" (28.6mm) round hole. Check your dash or control panel for a compatible cutout.
• Wiring: Two-wire connection. Attach one wire to the ignition side of the key switch (power when engine runs), the other to ground. No polarity sensitivity.
• OEM vs aftermarket: Universal fit. Not brand-specific. Replaces most mechanical or failing hour meters.
• What to measure before buying: Measure your existing meter hole diameter. If it’s not 1.125", you’ll need an adapter or a different meter.

Key Things to Know

• Initial hours settable: You can program the starting hour reading to match your current engine hours. Useful for replacing a broken meter without losing history.
• Resettable partial hours: Has a separate counter for tracking session time (e.g., oil change intervals). Easy to reset via the front button.
• Built-in battery: Retains total hours if external power is lost. No separate battery to replace.
• Installation difficulty: Easy. Strip wires, connect to switched 12V (or any 5–277V source) and ground, snap into panel. No special tools.
• Waterproof rating: Sealed for outdoor use, but avoid submerging. Fine for rain and washdowns.

Should You Buy It

This is a solid choice if you need a reliable, programmable hour meter for a ZTR mower, tractor, or generator and want to keep your total hours accurate after a replacement. It’s easy to install and offers both total and partial counters. Skip it if your panel hole is a different size or if you need a meter that works below 5V.