{"product_id":"qunnie-compression-tester-kit-9-piece-analog-gauge-spark-plug-tester-with-portable-case","title":"QUNNIE Compression Tester Kit 9-Piece — Analog Gauge \u0026 Spark Plug Tester with Portable Case","description":"\u003cb\u003eQUNNIE 9-Piece Compression Tester kit combines an easy-read analog gauge and spark plug tester with multiple adapters to diagnose gasoline engine compression and ignition issues across cars, motorcycles, outboards, chainsaws and snowmobiles.\u003c\/b\u003e\n\n\u003cp\u003eThis compact kit is designed for DIY mechanics and professional techs who need a portable, reliable way to check cylinder compression and verify spark at the plug. The large dial, pressure relief valve and assortment of adapter fittings make it straightforward to connect to a range of spark plug holes and threaded ports. A durable rubber case stores the parts safely and helps protect the instruments during transport and shop use.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I check engine compression with this kit?\u003c\/h3\u003e\n\u003cp\u003eAttach the correct threaded adapter into the spark plug hole, screw the hose and gauge assembly on, and crank the engine while the gauge records peak pressure. The meter locks the peak reading until you release it with the reset button, so you can read results easily after cranking stops.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge analog dial for quick visual readings\u003c\/li\u003e\n  \u003cli\u003ePressure relief valve for safe, controlled bleed-off\u003c\/li\u003e\n  \u003cli\u003eMultiple threaded adapters to fit common spark plug diameters\u003c\/li\u003e\n  \u003cli\u003eHolds peak pressure until manually reset\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan this kit test ignition and spark performance?\u003c\/h3\u003e\n\u003cp\u003eThe included spark plug tester lets you see whether an ignition spark is present while cranking the engine or during accessory tests. It mirrors the spark visually, so you can detect weak or intermittent ignition, poor plug connections, or wiring faults without inserting the plug into the engine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInline spark tester for visual spark confirmation\u003c\/li\u003e\n  \u003cli\u003eWorks with standard gasoline spark plugs across vehicle types\u003c\/li\u003e\n  \u003cli\u003eHelps isolate ignition system faults quickly\u003c\/li\u003e\n  \u003cli\u003ePortable and safe for bench or in-vehicle checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and vehicles will this tool work on?\u003c\/h3\u003e\n\u003cp\u003eThe kit is built for gasoline engines with spark plugs, covering single-cylinder and multi-cylinder setups found in motorcycles, cars, outboards, chainsaws, snowmobiles and small engines. Adapter variety and quick-connect rubber fittings allow use on inline 4- and 6-cylinder engines as well as many small power equipment engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits most automotive and motorcycle spark plug threads\u003c\/li\u003e\n  \u003cli\u003eAdapters and O-rings seal against blow-by for accurate readings\u003c\/li\u003e\n  \u003cli\u003eTwo quick-insert rubber adapters for quicker connection during cranking\u003c\/li\u003e\n  \u003cli\u003eCompact case for shop or field service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat practical features improve everyday use?\u003c\/h3\u003e\n\u003cp\u003eErgonomic design choices aim to make repeated testing faster and more reliable: the gauge face is oversized for readability, the bleed valve prevents overpressure, and the rubber case protects accessories from impacts. Adapters are supplied to reduce the number of trips to the parts store and to speed workflow when testing multiple cylinders.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge dial reduces reading errors under shop lighting\u003c\/li\u003e\n  \u003cli\u003ePressure relief valve prevents damage and aids safe draining\u003c\/li\u003e\n  \u003cli\u003eProtective rubber case keeps components organized and intact\u003c\/li\u003e\n  \u003cli\u003eAssorted fittings minimize adapter swapping between engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The QUNNIE 9-piece kit suits home mechanics, mobile technicians and hobbyists who service gasoline engines and need a reliable, portable diagnostic tool. It’s useful for anyone troubleshooting starting problems, suspected low compression, ignition misfires, or performing routine engine health checks across a wide range of vehicles and small engines.\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: Will this fit my car's spark plug thread?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes several common threaded adapters and O-rings to fit most gasoline spark plug threads; check your plug size against the adapters supplied.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the gauge hold peak compression readings?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—the analog gauge records peak pressure and holds it until you release it using the reset\/bleed valve.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"QUNNIE","offers":[{"title":"Default Title","offer_id":48084395425950,"sku":"B0DBLV4ZB5","price":31.38,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/qunnie-front-gauge-and-case.jpg?v=1785853536","url":"https:\/\/northtrailauto.ca\/products\/qunnie-compression-tester-kit-9-piece-analog-gauge-spark-plug-tester-with-portable-case","provider":"North Trail Auto","version":"1.0","type":"link"}