PQY Spark Plug Gap Tool with 32-Blade Feeler Gauge — Blue, 10–16mm Fit, Aluminum

PQY's universal spark plug gap tool is a compact aluminum gapping device paired with a 32-blade feeler gauge that lets you set precise spark plug gaps for most 10–16mm plug threads (not 18mm).

If you service engines at home, in a garage, or on the track, accurate spark plug gaps matter for consistent ignition performance. This kit combines a machined aluminum gapper with a wide-range steel feeler set so you can measure and adjust gaps from 0.04mm up to 0.88mm. The tool is designed for 10mm, 12mm, 14mm and 16mm standard plug sizes and includes a brass blade suited to electronic ignition systems.

How do I use the PQY gap tool to set a spark plug gap?

Using the tool is simple: seat the plug in the gapper’s receptacle, select the feeler blade matching your target gap, and turn the knurled knob until the electrode and feeler meet the desired clearance. For many plugs the electrode will spring back slightly after adjustment, so set just under your target if needed.

• Place the spark plug into the tool's head compatible with its thread size (10/12/14/16mm).
• Slide the chosen feeler blade between center and ground electrode for measurement.
• Rotate the knob to bend the ground electrode until the chosen feeler fits snugly.
• If electrode springs back, use a slightly thinner blade than the final target.

Which spark plugs and applications are supported?

The PQY gapping tool is made for most standard reach spark plugs with 10mm, 12mm, 14mm or 16mm threads. It is not compatible with 18mm-thread plugs or unusually long- or short-reach designs, so verify your plug dimensions before buying.

• Works with most motorcycle, lawn equipment, ATV, small engine and many automotive plug types.
• Not suitable for long-reach or short-reach specialty plugs.
• Check plug thread diameter and reach to confirm fitment.
• Includes brass blade for ignition systems that require non-marring contact.

What measurement range and materials are included?

The feeler set contains 32 blades covering 0.04mm (0.0015") to 0.88mm (0.035") so you can match common OEM gap specs. The body is machined aluminum with a matte finish for grip and corrosion resistance, while the gauge blades are high-grade manganese steel for accurate, repeatable thickness.

• 32 blades spanning 0.04mm to 0.88mm for precise gap selection.
• One 0.25mm (0.010") brass blade included for electronic ignition safety.
• Aluminum housing offers durability and lightweight handling.
• Manganese steel blades provide consistent, wear-resistant measurement.

Are there tips to get an exact gap and avoid common mistakes?

Because some electrodes flex back after bending, aim slightly under the intended gap and recheck with the feeler blade. Avoid over-bending metal repeatedly — if you see cracks or rough surfaces, replace the plug. Clean electrodes and use the brass blade when working near sensitive ignition modules.

• Set to a slightly smaller value if the electrode springs back after bending.
• Do not force blades or over-bend electrodes; replace plugs with visible damage.
• Use the brass blade with electronic ignition to reduce risk of damage.
• Confirm final gap by measuring after removing the plug from the tool.

Who is this for: mechanics, DIY enthusiasts, small-engine tuners and riders who need a compact, accurate gapping solution will appreciate this PQY kit. It’s ideal for routine maintenance and on-the-go adjustments where a lightweight, robust tool and a full range of feeler thicknesses make fast, reliable gap setting possible. Verify your spark plug thread size before purchase to ensure compatibility.