Digital Chainsaw Tachometer Tach Gauge Digital Display Pulse Speedometer for Gesture Induction Chain Saw Cropper Generator Lawn Mower RV ATV Dirt Bike Motocross Boat Tractor

What It Is

A digital tachometer that measures engine RPM via pulse induction (no direct wiring needed). It’s designed for chainsaws, generators, lawn mowers, ATVs, dirt bikes, boats, and tractors—any small engine with a spark plug ignition.

Fitment & Compatibility

• Spark plug type: Works with any gas engine that has a standard spark plug wire (copper core or resistor). Not for diesel engines or magneto-only ignitions without a plug lead.
• Measurement method: The sensor clips around the spark plug wire (inductive pickup) or uses gesture induction (touch the plug boot). Confirm your engine has accessible plug wire length (at least 2 inches).
• Display: Universal fit—no brand-specific mounting. Requires a flat surface for adhesive or zip-tie attachment.
• Engine range: Reads 0–20,000 RPM, covering most small engines (chainsaws, mowers, generators). Check your engine’s max RPM spec (typical mower: ~3,600; chainsaw: ~12,000).
• Battery: Uses a CR2032 coin cell (included). Replace if dead.

Key Things to Know

• Installation is easy: Clip sensor around plug wire (no cutting, no tools). For gesture mode, hold sensor near plug boot—no contact needed.
• Accuracy is decent: ±1% typical for most users, but weak spark or heavily shielded plug wires (e.g., some modern mowers) can cause erratic readings. Test on a known engine first.
• Display readability: Small LCD, hard to see in direct sunlight. Backlight is weak. Use in shade or tilt screen.
• Durability: Not waterproof—keep dry. Mount away from exhaust heat (above 140°F can damage electronics). Vibration can loosen clip; secure with a zip tie.

Should You Buy It

Buy this if you need a quick, cheap way to tune carburetors or verify RPM on small engines (chainsaws, mowers, generators) without wiring. Skip it if you need lab-grade accuracy, work with shielded plug wires, or want a waterproof unit for wet conditions. Good value for hobbyists and DIY maintenance.