{"product_id":"zeajsru-compression-tester-kit-for-cars-motorcycles-300-psi-gauge-with-spark-plug-tester-and-m10-m18-adapters","title":"ZEAJSRU Compression Tester Kit for Cars \u0026 Motorcycles — 300 PSI Gauge with Spark Plug Tester and M10–M18 Adapters","description":"\u003cp\u003e\u003cstrong\u003eZEAJSRU Compression Tester Kit is a complete 300 PSI cylinder pressure and spark plug testing set built to diagnose gasoline engine compression and basic ignition health on cars and motorcycles.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ZEAJSRU kit combines a 300 PSI dual-scale gauge, flexible hose, brass thread adapters, rubber cone fittings and a spark plug tester so you can quickly assess cylinder pressure and check ignition pulses without specialized shop equipment. Compact and portable, the kit is intended for routine diagnostics, pre-purchase checks, tune-ups and troubleshooting when an engine is running rough or losing power.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this kit measure cylinder compression reliably?\u003c\/h3\u003e\n\u003cp\u003eThe metal-bodied gauge reads up to 300 PSI and displays clear dual-scale markings for quick interpretation. A spring-loaded pressure release valve lets you vent the line and reset between cylinders while a flexible hose helps get the tester into awkward spark plug wells.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e300 PSI dual-scale analog gauge for accurate readings\u003c\/li\u003e\n  \u003cli\u003eRigid gauge housing for stable pointer response\u003c\/li\u003e\n  \u003cli\u003ePressure release valve for fast reset after each test\u003c\/li\u003e\n  \u003cli\u003eFlexible hose to reach deep or offset spark plug ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich engines and spark plug sizes will this compression tester fit?\u003c\/h3\u003e\n\u003cp\u003eThe set is designed for gasoline engines on cars, light trucks and motorcycles. It includes brass threaded adapters sized M10, M12, M14 and M18, covering the majority of common spark plug threads in small engines and many automotive applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eM10, M12, M14 and M18 brass adapters for widespread compatibility\u003c\/li\u003e\n  \u003cli\u003eStraight and curved rubber cone adapters for irregular ports\u003c\/li\u003e\n  \u003cli\u003eFlexible hose to accommodate cramped engine bays\u003c\/li\u003e\n  \u003cli\u003eWorks on most passenger cars and motorcycle cylinders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the spark plug tester do and when should I use it?\u003c\/h3\u003e\n\u003cp\u003eThe included spark plug tester provides a visual check of ignition by revealing whether spark energy is being produced at the plug lead. Use it when compression results are marginal or when diagnosing misfires, ignition coil or wiring faults before performing deeper engine work.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuick visual confirmation of ignition pulse at the plug lead\u003c\/li\u003e\n  \u003cli\u003eHelps separate ignition issues from compression problems\u003c\/li\u003e\n  \u003cli\u003eHandheld, insulated design for safe checks\u003c\/li\u003e\n  \u003cli\u003eUseful for on-vehicle troubleshooting without removing plugs first\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I get consistent test results with the ZEAJSRU kit?\u003c\/h3\u003e\n\u003cp\u003eWarm the engine to operating temperature, disable fuel and ignition per vehicle instructions, and crank the engine with the throttle open for uniform readings. Test each cylinder the same way and compare values against the manufacturer’s specifications and between cylinders to spot leaks, worn rings or valve problems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWarm engine to operating temperature before testing\u003c\/li\u003e\n  \u003cli\u003eDisable ignition\/fuel per safety procedure before removing spark plugs\u003c\/li\u003e\n  \u003cli\u003eCrank consistently (same number of revolutions) for each cylinder\u003c\/li\u003e\n  \u003cli\u003eCompare readings across cylinders and to factory specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Mechanics, home DIYers and motorcycle owners who need an affordable, portable compression and basic ignition test solution will benefit from the ZEAJSRU Compression Tester Kit. It suits anyone wanting fast on-vehicle diagnostics, pre-purchase inspections, routine engine checks or troubleshooting misfires without carrying heavy shop tools. The comprehensive adapter set and spark plug tester make it a practical choice for multi-vehicle garages and mobile technicians.\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 kit test both car and motorcycle engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The included M10, M12, M14 and M18 adapters and flexible hose make it compatible with most car and motorcycle gasoline engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the gauge have a pressure release for repeated tests?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 300 PSI gauge includes a pressure release valve to quickly vent and reset between cylinder measurements.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"ZEAJSRU","offers":[{"title":"Default Title","offer_id":48085512880286,"sku":"B0G4BXB1P3","price":36.32,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/zeajsru-front-view-kit.jpg?v=1785871423","url":"https:\/\/northtrailauto.ca\/products\/zeajsru-compression-tester-kit-for-cars-motorcycles-300-psi-gauge-with-spark-plug-tester-and-m10-m18-adapters","provider":"North Trail Auto","version":"1.0","type":"link"}