Rotary Archer Digital Engine Tachometer — Handheld RPM Meter 100–19,000 RPM, 2‑/4‑Stroke Compatible

The Rotary Archer Digital Engine Tachometer is a compact, accurate RPM meter that replaces Echo 99051130017 and measures engine speed from 100 to 19,000 RPM for both 2‑stroke and 4‑stroke motors.

This handheld tachometer delivers fast, reliable RPM readings for small engines, outdoor power equipment, and workshop testing. Built as a compatible alternative to the Echo 99051130017 and PET-1000R, the Archer provides a clear digital display, selectable measurement modes for 2‑ and 4‑stroke ignition patterns, and the option to read RPMs wirelessly via pulse detection or through a supplied clip‑on lead.

How quickly and accurately does this tachometer read engine speed?

The Archer offers rapid updates and precise readings suitable for tuning and diagnostics. It samples RPM at a 0.5 second refresh interval and reports values within a tight accuracy band.

• Range: 100 to 19,000 RPM
• Accuracy: approximately ±10 RPM
• Refresh rate: 0.5 second intervals for near real‑time feedback
• Stable digital readout minimizes interpretation errors

Can I use it on both 2‑stroke and 4‑stroke engines?

Yes — the device includes selectable settings to match ignition pulse patterns from different engine types. Switch modes to ensure each combustion cycle is interpreted correctly and avoid misleading RPM numbers.

• Dedicated mode selection for 2‑stroke engines
• Separate mode for 4‑stroke engines
• Mode switching adjusts pulse counting logic for accurate results
• Works with a wide variety of small engine ignition systems

Do I need to connect wires, or can it read RPMs wirelessly?

The Archer supports both wired and pulse‑activated wireless readings so you can choose the method that fits your workflow. Use the included clip lead for direct contact measurement or rely on pulse sensing for non‑intrusive checks.

• Wireless pulse activation reads without direct electrical connection
• Clip‑on lead included for hardwired measurement when required
• Ideal for delicate electronics or when endpoint access is limited
• Flexible options reduce setup time in the field or shop

What should I expect in terms of build and compatibility?

The instrument is engineered as a drop‑in alternative to familiar tachometer modules, offering compatible performance with Echo and PET units. Its compact housing and clear display make it easy to read and integrate into routine maintenance tasks.

• Designed as a replacement for Echo 99051130017 and similar PET‑1000R units
• Compact handheld form factor for portability
• Clear digital display for quick visual checks
• Supplied accessories include the clip lead for wired measurements

Who is this for: Technicians, small engine owners, landscapers, and DIYers who need an affordable, accurate tachometer for tuning, troubleshooting, and routine maintenance. If you work with chainsaws, trimmers, blowers, lawn mowers, or other gasoline engines and want a dependable replacement for Echo part numbers or a PET‑1000R‑style meter, the Rotary Archer delivers practical functionality without extra complexity.