{"product_id":"beley-spark-plug-tester-dual-hole-h90-dual-socket-ignition-tester-500-9000-rpm-adjustable-taller-sockets","title":"BELEY Spark Plug Tester Dual-Hole H90 — Dual-Socket Ignition Tester, 500–9000 RPM Adjustable, Taller Sockets","description":"\u003cp\u003e\u003cstrong\u003eBELEY Spark Plug Tester Dual Holes is a handheld ignition diagnostic tool that lets you quickly compare and verify spark plug performance across different plug lengths with adjustable 500–9000 RPM firing speeds.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for professional mechanics and DIY enthusiasts, this upgraded H90 tester combines a dual-socket design, battery-clip power, and a digital readout so you can test a wide range of spark plugs away from a bench outlet. The taller sockets accept both standard and longer automotive plugs, while the higher maximum frequency gives a clearer picture of ignition behavior under various simulated conditions.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the dual-hole design make plug testing easier?\u003c\/h3\u003e\n\u003cp\u003eThe two-socket layout lets you mount and compare two spark plugs side-by-side, speeding up diagnosis when you suspect one cylinder is misfiring. Taller sockets accommodate longer automotive plugs used by many European makes without sacrificing contact or stability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e8 mm taller sockets than previous versions for longer plug compatibility\u003c\/li\u003e\n  \u003cli\u003eSimultaneous visual comparison of ignition between two plugs\u003c\/li\u003e\n  \u003cli\u003eWorks with standard and extended-length plugs (14mm\/16mm nut diameters)\u003c\/li\u003e\n  \u003cli\u003eNot suitable for very short two-stroke style plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy use battery-clip power instead of mains electricity?\u003c\/h3\u003e\n\u003cp\u003eThe BELEY tester connects directly to a vehicle battery via a clip, which makes field checks and roadside diagnostics simple and portable. Eliminating the need for a wall outlet reduces setup time and keeps the tester usable in garages, workshops, and on the go.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect battery connection for off-grid testing\u003c\/li\u003e\n  \u003cli\u003eDurable ABS construction resists heat and impact during shop use\u003c\/li\u003e\n  \u003cli\u003eCompact form factor for easy transport in a toolbox or glovebox\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the adjustable 500–9000 RPM range and display add to testing?\u003c\/h3\u003e\n\u003cp\u003eInstead of the typical 6000 RPM ceiling, this tester reaches up to 9000 RPM, letting you evaluate spark continuity at higher firing frequencies for a more complete assessment. The digital readout, LED indicator, and audible alarm make it straightforward to confirm the operating frequency and observe spark behavior in real time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdjustable analogue control covering 500–9000 RPM\u003c\/li\u003e\n  \u003cli\u003eLED indicator and audible alarm signal active firing\u003c\/li\u003e\n  \u003cli\u003eRotary knobs and digital display for precise speed visualization\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there any compatibility or handling notes I should know?\u003c\/h3\u003e\n\u003cp\u003eThe H90 accepts a wide range of automotive spark plugs, including longer types used in BMW, Volkswagen, and Audi models, but it cannot test very short two-stroke or model-engine plugs. Titanium plugs with protective caps require cap removal before use to ensure proper contact and accurate results.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with many passenger car spark plug lengths and diameters\u003c\/li\u003e\n  \u003cli\u003eNot intended for short two-stroke, chainsaw, or model engine plugs\u003c\/li\u003e\n  \u003cli\u003eRemove protective caps from titanium-style plugs before testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The BELEY Spark Plug Tester Dual Holes is ideal for independent mechanics, fleet service technicians, and hands-on vehicle owners who need a portable, accurate way to evaluate ignition performance. If you work on modern cars that use longer spark plugs or need to perform quick field diagnostics without mains power, this tester gives a reliable, visual, and audible method to identify weak or non-firing plugs before deeper engine troubleshooting.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this tester run from a car battery?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it uses a battery clip to power tests directly from a vehicle battery, no mains needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will it test short two-stroke or model-engine spark plugs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — the H90's sockets are taller and can't securely hold very short plugs used in two-stroke equipment.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BELEY","offers":[{"title":"Default Title","offer_id":48085340520606,"sku":"B0DK1DD2MC","price":39.35,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/beley-spark-plug-tester-front.jpg?v=1785869554","url":"https:\/\/northtrailauto.ca\/products\/beley-spark-plug-tester-dual-hole-h90-dual-socket-ignition-tester-500-9000-rpm-adjustable-taller-sockets","provider":"North Trail Auto","version":"1.0","type":"link"}