Runleader Tachometer Hour Meter Temperature Gauge RL-HM035A-M5 — RPM, Runtime & Probe Temp with Alerts

Runleader RL-HM035A-M5 is a combined tachometer, hour meter and engine temperature gauge built to track RPM, runtime and probe temperature with alerts and programmable service reminders. The RL-HM035A-M5 brings RPM readouts, total and job-hour logging, and probe temperature monitoring into one compact instrument designed for small engines, generators and equipment. It records highest RPM and maximum temperature since start, allows manual input of previous hours when replacing units, and triggers visual alerts for over-rev and over-temperature conditions. Rugged construction, selectable backlight modes and simple mounting options make it practical for workshop and field use.

How does this gauge display and record engine running hours?

The unit tracks two separate hour counters: TOT (total accumulated run time) and JOB (single-session hours). You can also preset previous hours (INT) to carry over service history when swapping the meter. A service reminder (SVC) can be set between 5 and 1000 hours so you know when maintenance is due.

• Total and job hour ranges: 0–99,999 hours
• Programmable previous hours for replacement units
• Service timer adjustable from 5 to 1000 hours
• LCD shutdown to extend battery life during long downtime

What RPM information and alarms will I get?

The meter shows real-time RPM using a one-wire pickup on the spark plug lead and adapts to different firing patterns. It keeps the peak RPM recorded since startup and lets you set an RPM alert threshold to warn of over-revving. The readable range spans 0 to 25,000 RPM, making it suitable for a wide variety of small gas engines.

• Real-time RPM readout and highest RPM stored
• RPM alert programmable from 100 to 25,000 RPM
• One-wire spark plug signal lead included (68.8 inches)
• Supports multiple ignition/firing pattern settings

How accurate and flexible is the temperature monitoring?

The RL-HM035A-M5 monitors current and maximum temperatures via a probe sensor and alerts you when readings exceed your set threshold. Temperature can be shown in Celsius or Fahrenheit and covers a wide span from -20°C up to 300°C (-4°F to 572°F). This provides visibility for overheating risks without complex installations.

• Temperature range: -20°C to 300°C (-4°F to 572°F)
• Switchable °C/°F display
• Max temperature memory since engine start
• Over-temperature alert with red backlight indication

What are the installation, durability and display options?

Install the gauge by stick-on tape, screws or an auxiliary bracket (bracket not included), and use the supplied one-wire lead to detect ignition pulses. The default green backlight improves night readability, with selectable always-on, auto-on, or off (button wake) modes; red backlight signals alarms. The unit is built with water and shock resistance and a removable battery preserved by an insulation tab during shipping.

• Mounting: adhesive pad, screws, or bracket (bracket sold separately)
• Backlight modes: always-on, auto, or off; red alarm backlight
• Shock- and water-resistant casing for rugged use
• Replaceable internal battery and 2-year support warranty

Who is this for This instrument is aimed at owners and technicians of small gasoline engines, portable generators, pressure washers, go-karts, lawn equipment and other machinery where RPM, run time and probe temperature matter. It fits users who want a single compact device for maintenance scheduling, engine tuning and basic overheating protection without complex wiring or bulky instrumentation.

FAQ

Q: Can I preset the meter with previous hours?

A: Yes — the INT function lets you enter prior hours so service history continues after replacement.

Q: What temperature range does the probe support?

A: The temperature probe reads -20°C to 300°C (-4°F to 572°F) with selectable °C/°F display.