{"product_id":"betooll-compression-tester-kit-13pc-0-300-psi-gauge-with-spark-plug-tester-triple-scale-dial","title":"BETOOLL Compression Tester Kit 13pc — 0–300 PSI Gauge with Spark Plug Tester, Triple-Scale Dial","description":"\u003cp\u003e\u003cstrong\u003eBETOOLL 13-piece compression tester with built-in spark plug tester is a handheld diagnostic kit that measures engine cylinder compression up to 300 PSI and checks ignition spark quickly and reliably.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen an engine runs rough, stalls, or lacks power, measuring compression and confirming spark are two essential first steps to isolate cylinder, valve, piston ring, or ignition faults. This compact kit contains a triple-scale gauge (PSI, bar, kg\/cm²), a one-handed release valve, a spark plug test circuit with indicator light, and ten adapters to fit a wide variety of petrol engines used in cars, trucks, boats, lawn equipment, and ATVs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the compression gauge help diagnose engine issues?\u003c\/h3\u003e\n\u003cp\u003eThe gauge reports peak cylinder pressure so you can compare readings between cylinders and spot leaks or weak compression. Consistent low readings or wide variances can indicate worn rings, leaking valves, or head gasket failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTriple-range dial: 0–300 PSI, 0–20 bar, 0–21 kg\/cm² for universal readability\u003c\/li\u003e\n  \u003cli\u003eQuick-connect adapters for spark plugs and threaded ports\u003c\/li\u003e\n  \u003cli\u003eClear analog dial for immediate visual comparison across cylinders\u003c\/li\u003e\n  \u003cli\u003eRelief valve enables controlled depressurization after tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan the kit check ignition spark and how is that useful?\u003c\/h3\u003e\n\u003cp\u003eThe included spark plug tester lets you confirm whether the ignition system is producing a consistent spark, which helps separate electrical faults from mechanical compression problems. The indicator light illuminates when a healthy spark is present.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo spark plug tester leads for quick connection\u003c\/li\u003e\n  \u003cli\u003eVisible indicator light shows spark activity without removing plugs repeatedly\u003c\/li\u003e\n  \u003cli\u003eSafely isolates the circuit to prevent misfires during diagnosis\u003c\/li\u003e\n  \u003cli\u003eWorks alongside compression testing to narrow fault sources\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat engine types and sizes will these adapters fit?\u003c\/h3\u003e\n\u003cp\u003eThis 13-piece set includes ten different adapters designed to cover most petrol engines—from compact motorcycle and lawnmower motors to larger automotive and marine cylinders. It’s meant for gasoline engines only, not crude oil or diesel engines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdapters for spark plug threads and various compression ports\u003c\/li\u003e\n  \u003cli\u003eCompatible with cars, trucks, ATVs, boats, lawn tractors, and small engines\u003c\/li\u003e\n  \u003cli\u003ePortable kit keeps adapters organized for field or garage use\u003c\/li\u003e\n  \u003cli\u003eStandard fittings minimize need for additional hose or fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I operate the tester safely and get accurate readings?\u003c\/h3\u003e\n\u003cp\u003eWarm the engine to operating temperature, disable ignition and fuel systems per the manual, then crank the engine with the tester installed. Record peak pressure after several compression strokes and use the release valve to safely vent the gauge.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWarm engine ensures valves and rings seat correctly for consistent readings\u003c\/li\u003e\n  \u003cli\u003eDisable ignition\/fuel to prevent engine start while testing\u003c\/li\u003e\n  \u003cli\u003eCrank for 4–6 compression strokes and note the maximum dial reading\u003c\/li\u003e\n  \u003cli\u003eUse release valve for one-handed decompression and safe removal\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The BETOOLL 13pcs Compression Tester with Spark Plug Tester suits mechanics, home DIYers, fleet technicians, and marine or small-engine operators who need a reliable, portable way to evaluate cylinder health and ignition performance. It’s ideal when you need fast comparative compression data across cylinders and a quick spark check without expensive shop equipment. Note: designed for petrol engines only and should be used following standard safety practices to avoid injury or engine damage.\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: Is this tester suitable for diesel engines?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This BETOOLL kit is designed for petrol (gasoline) engines only and is not intended for diesel or crude oil engines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How many adapters are included and what do they fit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The set includes ten different adapters plus hoses, covering most spark-plug threaded ports and common compression fittings for cars, ATVs, lawn mowers, boats, and small engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"BETOOLL","offers":[{"title":"Default Title","offer_id":48083833913502,"sku":"B0BDFLD8C5","price":54.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/betooll-compression-tester-front-view.jpg?v=1785836847","url":"https:\/\/northtrailauto.ca\/products\/betooll-compression-tester-kit-13pc-0-300-psi-gauge-with-spark-plug-tester-triple-scale-dial","provider":"North Trail Auto","version":"1.0","type":"link"}