{"product_id":"jf109-tandstifts-tester","title":"JFIND JF109 Adjustable Dual Hole Spark Plug Tester - Spark Tester \u0026 Diagnostic Tool","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003eJFIND JF109 Adjustable Dual-Hole Spark Plug Tester – Spark Tester \u0026amp; Diagnostic Tool\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eJFIND JF109 Spark Plug Tester\u003c\/strong\u003e is a professional diagnostic tool for testing \u003cstrong\u003espark plug performance and spark strength\u003c\/strong\u003e. With two test holes, you can compare two spark plugs simultaneously – perfect for quickly determining if a spark plug is weak, defective, or functioning correctly.\u003c\/p\u003e\n\u003ch3\u003e⚡ Key Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Hole Design\u003c\/strong\u003e – test two spark plugs simultaneously for comparison between new and old.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Frequency\u003c\/strong\u003e – simulates engine RPM from \u003cem\u003e1000–6000 rpm\u003c\/em\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear Spark\u003c\/strong\u003e – strong and stable spark formation makes it easy to determine the spark plug's condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Input Voltage Range\u003c\/strong\u003e – works with \u003cem\u003e100V–240V\u003c\/em\u003e input, universal compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Gasoline Engines\u003c\/strong\u003e – suitable for all 12V gasoline-powered vehicles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe Use\u003c\/strong\u003e – protected design, but follow safety instructions to avoid shocks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🔍 Area of Application\u003c\/h3\u003e\n\u003cp\u003eThe JFIND JF109 is used to test the \u003cstrong\u003espark strength and ignition capability of spark plugs\u003c\/strong\u003e. By simulating the high voltage from the ignition coil (over 10,000 V), you can see if the spark between the electrodes is strong enough to ignite the fuel\/air mixture in the engine.\u003c\/p\u003e\n\u003ch3\u003e📖 User Manual (brief)\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003ePlace the spark plug in hole 1 or 2. For comparison: new spark plug in hole 1, old in hole 2.\u003c\/li\u003e\n\u003cli\u003eConnect the tester to the power supply (100–240V).\u003c\/li\u003e\n\u003cli\u003eTurn the switch clockwise to start the tester (indicator light comes on, starting frequency 1000 rpm).\u003c\/li\u003e\n\u003cli\u003eAdjust the frequency between 1000–6000 rpm to simulate different engine speeds and observe how the spark reacts.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003e⚠️ Safety Instructions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlways turn off the power before placing or removing spark plugs.\u003c\/li\u003e\n\u003cli\u003eNever touch the spark plug during operation – the tester generates high voltage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e📐 Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e JFIND JF109\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Testing spark strength and spark plug function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Range:\u003c\/strong\u003e 100–240V input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor Vehicles:\u003c\/strong\u003e 12V gasoline engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Range:\u003c\/strong\u003e 1000–6000 rpm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Capacity:\u003c\/strong\u003e 2 spark plugs simultaneously\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Suitable for\u003c\/h3\u003e\n\u003cp\u003eCars, motorcycles, mopeds, ATVs, and other vehicles with \u003cstrong\u003e12V gasoline engines\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003e❓ FAQ – Frequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use the tester for diesel engines?\u003c\/strong\u003e\u003cbr\u003eNo, this model is only intended for 12V gasoline-powered vehicles.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens if the spark is weak?\u003c\/strong\u003e\u003cbr\u003eA weak or absent spark pattern indicates that the spark plug is defective and should be replaced.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it dangerous to use?\u003c\/strong\u003e\u003cbr\u003eNo, as long as you follow the safety instructions. Never touch the spark plug during operation.\u003c\/p\u003e\n\u003ch3\u003e🛒 Conclusion\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eJFIND JF109 Dual-Hole Spark Plug Tester\u003c\/strong\u003e is a reliable tool for both mechanics and home DIYers. With the ability to compare two spark plugs simultaneously and adjust the test frequency, you get a clear picture of the spark plugs' condition – quickly, easily, and safely.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Jfind","offers":[{"title":"Default Title","offer_id":54177160429836,"sku":"FEL-B0198","price":27.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/4979\/6876\/files\/Hde58c409d51a4c90b63534679ba64f37N_56c37380-c79f-479f-afec-bc59fab9ba89.jpg?v=1771872445","url":"https:\/\/www.felkodslasare.se\/en-en\/products\/jf109-tandstifts-tester","provider":"Felkodsläsare","version":"1.0","type":"link"}