{"id":3593,"date":"2026-09-29T05:43:51","date_gmt":"2026-09-29T05:43:51","guid":{"rendered":"https:\/\/shop.autoboss.com\/?post_type=product&#038;p=3593"},"modified":"2026-10-09T08:20:31","modified_gmt":"2026-10-09T08:20:31","slug":"autool-spt301-adjustable-spark-tester","status":"publish","type":"product","link":"https:\/\/autoboss.com\/de\/product\/autool-spt301-adjustable-spark-tester\/","title":{"rendered":"AUTOOL SPT301 3-Socket Digital Spark Plug Tester \u2013 200\u20139000 RPM"},"content":{"rendered":"<div class=\"abd-pd\" data-abd-version=\"1\">\n<header class=\"abd-hero\">\n<h3>Compare Two Spark Plugs Against a Known Reference<\/h3>\n<p class=\"abd-lead\">The SPT301 fires one reference plug and two test plugs side by side under a transparent cover at an adjustable 200\u20139000 rpm simulated rate. Results are a relative in-air comparison, not proof of spark performance under cylinder pressure or load.<\/p>\n<ul class=\"abd-facts\">\n<li>1 Reference + 2 Test Plugs<\/li>\n<li>200\u20139000 rpm<\/li>\n<li>LCD Speed Display<\/li>\n<li>Long-Plug Support<\/li>\n<\/ul>\n<\/header>\n<section class=\"abd-sec\" id=\"abd-features\">\n<h4>Key Features<\/h4>\n<ol class=\"abd-features\">\n<li>\n<h5>Reference Comparison<\/h5>\n<p>Fire a new or known-good plug next to two test plugs for a direct visual comparison of spark strength.<\/p>\n<\/li>\n<li>\n<h5>Adjustable Firing Rate<\/h5>\n<p>Set the simulated rate from 200 to 9000 rpm with the + and \u2212 buttons and compare all plugs at the same displayed setting.<\/p>\n<\/li>\n<li>\n<h5>Adjustable Socket Height<\/h5>\n<p>Socket height adjusts to accept longer spark plug ends.<\/p>\n<\/li>\n<li>\n<h5>Transparent Safety Cover<\/h5>\n<p>Watch spark behavior through the cover while reducing direct spark exposure.<\/p>\n<\/li>\n<li>\n<h5>Grouped Controls<\/h5>\n<p>Test holes, cover, display and buttons sit together on one compact bench unit.<\/p>\n<\/li>\n<\/ol>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-compare\">\n<h4>Model Comparison<\/h4>\n<div class=\"abd-table-wrap\">\n<table class=\"abd-table abd-compare\">\n<thead>\n<tr>\n<th scope=\"col\"><\/th>\n<th scope=\"col\" class=\"is-current\">SPT301<\/th>\n<th scope=\"col\">SPT101<\/th>\n<th scope=\"col\">SPT105<\/th>\n<th scope=\"col\">SPT360<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Test positions<\/th>\n<td class=\"is-current\">3<\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>5<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Simulated speed<\/th>\n<td class=\"is-current\">200\u20139000 rpm<\/td>\n<td>0\u20136000 rpm<\/td>\n<td>0\u20136000 rpm<\/td>\n<td>200\u20139000 rpm<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Adjustable height \/ long plugs<\/th>\n<td class=\"is-current\">Yes<\/td>\n<td>No<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">LCD backlit display<\/th>\n<td class=\"is-current\">Yes<\/td>\n<td>No<\/td>\n<td>No<\/td>\n<td>Yes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-box\">\n<h4>What&#8217;s in the Box<\/h4>\n<ul class=\"abd-box\">\n<li>SPT301 spark plug tester<\/li>\n<li>Power adapter<\/li>\n<li>User manual<\/li>\n<li>Retail box<\/li>\n<\/ul>\n<figure class=\"abd-fig\"><img decoding=\"async\" src=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/537be202de9d20483208c931.webp\" alt=\"AUTOOL SPT301 spark plug tester with retail box, user manual and power adapter\" width=\"1200\" height=\"1200\" loading=\"lazy\"><figcaption>Package contents as shown by the manufacturer. Spark plugs are not included.<\/figcaption><\/figure>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-use\">\n<h4>How to Use<\/h4>\n<ol class=\"abd-steps\">\n<li><b>Place the plugs<\/b><span>With power off, fit the reference plug in the standard hole and the plugs to be tested in the test holes.<\/span><\/li>\n<li><b>Close the cover<\/b><span>Lower the protective cover before testing.<\/span><\/li>\n<li><b>Power on<\/b><span>Plug the adapter into the side power socket, connect power and switch on.<\/span><\/li>\n<li><b>Adjust and observe<\/b><span>Set the rate with + and \u2212 and compare the sparks through the cover.<\/span><\/li>\n<\/ol>\n<p class=\"abd-note\">Height and speed adjustment, safety and troubleshooting: <a href=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/d1cfe64fd6a091016c14ffc4.pdf\" target=\"_blank\" rel=\"noopener\">SPT301 user manual (PDF)<\/a>.<\/p>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-notes\">\n<h4>Good to Know<\/h4>\n<div class=\"abd-notes\">\n<div class=\"abd-note-group is-caution\">\n<h5><span class=\"abd-tag\">Caution<\/span><\/h5>\n<ul>\n<li>Plug voltage can reach tens of thousands of volts. Do not touch plugs during operation, and switch off before inserting, removing or repositioning them.<\/li>\n<li>Stop using the tester if wiring is aged or damaged, and keep the safety cover intact.<\/li>\n<\/ul>\n<\/div>\n<div class=\"abd-note-group is-care\">\n<h5><span class=\"abd-tag\">Care<\/span><\/h5>\n<ul>\n<li>Confirm size and fit before testing unusual plug types.<\/li>\n<li>Confirm suspected ignition faults on the vehicle; the bench result is a relative check.<\/li>\n<li>Store in a dry, ventilated place away from heat, humidity and corrosive liquids.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Three-Plug Comparison:<\/strong> Test one reference plug with two test plugs for side-by-side visual comparison.<\/li>\n<li><strong>200\u20139000 RPM Setting:<\/strong> Adjust the simulated firing rate from 200 to 9000 rpm.<\/li>\n<li><strong>Digital RPM Display:<\/strong> Read the simulated speed on the backlit LCD while setting the comparison condition.<\/li>\n<li><strong>Adjustable Plug Height:<\/strong> Adjust the test-hole height for compatible longer spark-plug ends.<\/li>\n<li><strong>Visible Protective Cover:<\/strong> Observe spark behavior through the transparent cover while reducing direct exposure.<\/li>\n<\/ul>","protected":false},"featured_media":12444,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[128],"product_cat":[62,103],"product_tag":[156,157,129,158,159],"class_list":["post-3593","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-best-selling-products","product_cat-spark-plug-tester","product_tag-3-holes","product_tag-auto-spark-plug-tester","product_tag-autool","product_tag-best-spark-plug-tester","product_tag-spark-plug-tester-advance-auto","first","instock","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product\/3593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/comments?post=3593"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media\/12444"}],"wp:attachment":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media?parent=3593"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_brand?post=3593"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_cat?post=3593"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_tag?post=3593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}