Spark Plug Gap Tool | Dual Scale Coin Gauge 0.6–2.4mm

Keep your engine running at peak performance with this compact Spark Plug Gap Gauge. Designed in a handy coin style, this zinc alloy tool lets you measure and adjust spark plug gaps quickly and accurately — whether you're working on a car, motorcycle, or small engine. Made in Mainland China.

Key Features

• Dual Scale Design: One side displays the metric scale (0.6–2.4 mm) and the other shows the imperial scale (0.020–0.100 in), catering to all measurement preferences.
• Measure & Adjust: Slide the calibrated rim edge into the spark plug gap to check the clearance, then use the built-in gap opener notch for gentle, precise adjustment.
• Durable Zinc Alloy Body: Solid coin-style construction stands up to repeated workshop use. Resists bending and wear for long-lasting reliability.
• Clear Engraved Markings: Deep-engraved scale lines remain legible even in dimly lit garages, so you get an accurate reading every time.
• Portable Keyring Hole: The built-in round hole lets you clip the gauge to a keyring, tool board, or repair kit — always within reach when you need it.

Specifications

Package Includes

• 1 × Spark Plug Gap Gauge

Note: Please verify your vehicle's spark plug gap specification before use. Slight dimensional differences may occur due to manual measurement.

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Learn more: FuelEconomy.gov driving efficiency guidance

Frequently Asked Questions

Q: What vehicles is this spark plug gap tool compatible with?

A: This spark plug gap gauge is suitable for a wide range of cars, motorcycles, and small engines. It covers a measuring range of 0.6–2.4 mm (0.020–0.100 in), which encompasses most standard spark plug gap specifications for petrol-powered vehicles.

Q: How do I use the gap opener notch to adjust the spark plug gap?

A: Locate the notch on the rim of the coin gauge and carefully hook it onto the spark plug electrode. Apply gentle leverage to widen or narrow the gap until it matches your vehicle's recommended specification. Always re-check the gap with the measuring edge after adjustment.

Q: Is this spark plug gap gauge accurate enough for professional workshop use?

A: Yes. The deeply engraved dual-scale markings on the zinc alloy body provide clear, repeatable readings. While it is compact and portable, it delivers the accuracy needed for both home garage and professional workshop spark plug servicing tasks.