{"product_id":"champion-512-spark-plug","title":"Champion 512 Spark Plug","description":"\u003ch2 data-section-id=\"rmw5tv\" data-start=\"129\" data-end=\"143\"\u003eDescription\u003c\/h2\u003e\n\u003cp data-start=\"144\" data-end=\"509\"\u003eThe \u003cstrong data-start=\"148\" data-end=\"181\"\u003eChampion 512 Spark Plug (H12)\u003c\/strong\u003e is a \u003cstrong data-start=\"187\" data-end=\"226\"\u003eCopper Plus small engine spark plug\u003c\/strong\u003e designed to deliver dependable ignition performance in small engines, vintage automotive applications, and utility equipment. It features a \u003cstrong data-start=\"367\" data-end=\"399\"\u003ecopper core center electrode\u003c\/strong\u003e that improves conductivity and heat control, helping extend spark plug life and maintain consistent ignition.\u003c\/p\u003e\n\u003cp data-start=\"511\" data-end=\"792\"\u003eEngineered as an \u003cstrong data-start=\"528\" data-end=\"552\"\u003eOE-style replacement\u003c\/strong\u003e, the Champion 512 spark plug is built to \u003cstrong data-start=\"594\" data-end=\"619\"\u003eISO and SAE standards\u003c\/strong\u003e and provides excellent resistance to fouling and corrosion. Its durable construction makes it suitable for older engines and equipment operating under demanding conditions.\u003c\/p\u003e\n\u003cp data-start=\"794\" data-end=\"977\"\u003eWith a \u003cstrong data-start=\"801\" data-end=\"871\"\u003e14 mm thread diameter, 0.438 in reach, and flat seat configuration\u003c\/strong\u003e, this plug is commonly used in \u003cstrong data-start=\"903\" data-end=\"976\"\u003evintage vehicles, marine engines, small equipment, and utility motors\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1d7mrtu\" data-start=\"979\" data-end=\"990\"\u003eFeatures\u003c\/h2\u003e\n\u003cul data-start=\"991\" data-end=\"1280\"\u003e\n\u003cli data-section-id=\"1xxiqdo\" data-start=\"991\" data-end=\"1040\"\u003e\n\u003cp data-start=\"993\" data-end=\"1040\"\u003eCopper Plus design for dependable performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"tzd7ox\" data-start=\"1041\" data-end=\"1075\"\u003e\n\u003cp data-start=\"1043\" data-end=\"1075\"\u003eOE type replacement spark plug\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7nxbgm\" data-start=\"1076\" data-end=\"1147\"\u003e\n\u003cp data-start=\"1078\" data-end=\"1147\"\u003eCopper core center electrode improves heat control and conductivity\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1y1kvh3\" data-start=\"1148\" data-end=\"1189\"\u003e\n\u003cp data-start=\"1150\" data-end=\"1189\"\u003eResists fouling for reliable ignition\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"j39nqe\" data-start=\"1190\" data-end=\"1223\"\u003e\n\u003cp data-start=\"1192\" data-end=\"1223\"\u003eSuperior corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"14cpuke\" data-start=\"1224\" data-end=\"1280\"\u003e\n\u003cp data-start=\"1226\" data-end=\"1280\"\u003eBuilt to ISO and SAE standards for proven durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"1a3ueyz\" data-start=\"1282\" data-end=\"1299\"\u003eSpecifications\u003c\/h2\u003e\n\u003cp data-start=\"1301\" data-end=\"1496\"\u003e\u003cstrong data-start=\"1301\" data-end=\"1311\"\u003eBrand:\u003c\/strong\u003e Champion\u003cbr data-start=\"1320\" data-end=\"1323\"\u003e\u003cstrong data-start=\"1323\" data-end=\"1339\"\u003ePart Number:\u003c\/strong\u003e 512\u003cbr data-start=\"1343\" data-end=\"1346\"\u003e\u003cstrong data-start=\"1346\" data-end=\"1360\"\u003ePlug Type:\u003c\/strong\u003e H12\u003cbr data-start=\"1364\" data-end=\"1367\"\u003e\u003cstrong data-start=\"1367\" data-end=\"1386\"\u003eClassification:\u003c\/strong\u003e Champion Copper Plus Small Engine\u003cbr data-start=\"1420\" data-end=\"1423\"\u003e\u003cstrong data-start=\"1423\" data-end=\"1438\"\u003eGrade Type:\u003c\/strong\u003e Standard Replacement\u003cbr data-start=\"1459\" data-end=\"1462\"\u003e\u003cstrong data-start=\"1462\" data-end=\"1483\"\u003ePart Description:\u003c\/strong\u003e Spark Plug\u003c\/p\u003e\n\u003ch3 data-section-id=\"1leq9i9\" data-start=\"1498\" data-end=\"1511\"\u003eElectrode\u003c\/h3\u003e\n\u003cul data-start=\"1512\" data-end=\"1798\"\u003e\n\u003cli data-section-id=\"1w81wf2\" data-start=\"1512\" data-end=\"1553\"\u003e\n\u003cp data-start=\"1514\" data-end=\"1553\"\u003eCenter Electrode Tip Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"42bjef\" data-start=\"1554\" data-end=\"1591\"\u003e\n\u003cp data-start=\"1556\" data-end=\"1591\"\u003eCenter Electrode Design: Standard\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"12c9qgh\" data-start=\"1592\" data-end=\"1629\"\u003e\n\u003cp data-start=\"1594\" data-end=\"1629\"\u003eCenter Electrode Diameter: 0.1 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1tcgx5m\" data-start=\"1630\" data-end=\"1662\"\u003e\n\u003cp data-start=\"1632\" data-end=\"1662\"\u003eGround Electrode Quantity: 1\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"sunzm9\" data-start=\"1663\" data-end=\"1713\"\u003e\n\u003cp data-start=\"1665\" data-end=\"1713\"\u003eGround Electrode Material: Nickel Copper Alloy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"psgbmu\" data-start=\"1714\" data-end=\"1756\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1756\"\u003eGround Electrode Core Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"es7l3k\" data-start=\"1757\" data-end=\"1798\"\u003e\n\u003cp data-start=\"1759\" data-end=\"1798\"\u003eGround Electrode Tip Material: Nickel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"bpec4l\" data-start=\"1800\" data-end=\"1814\"\u003eDimensions\u003c\/h3\u003e\n\u003cul data-start=\"1815\" data-end=\"2033\"\u003e\n\u003cli data-section-id=\"23p4wp\" data-start=\"1815\" data-end=\"1852\"\u003e\n\u003cp data-start=\"1817\" data-end=\"1852\"\u003eThread Diameter: 14 mm \/ 0.551 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e5oio9\" data-start=\"1853\" data-end=\"1872\"\u003e\n\u003cp data-start=\"1855\" data-end=\"1872\"\u003eReach: 0.438 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e40vn5\" data-start=\"1873\" data-end=\"1907\"\u003e\n\u003cp data-start=\"1875\" data-end=\"1907\"\u003eHex Size: 0.813 in \/ 20.650 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"12ns31y\" data-start=\"1908\" data-end=\"1927\"\u003e\n\u003cp data-start=\"1910\" data-end=\"1927\"\u003eSeat Type: Flat\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"gsl5i7\" data-start=\"1928\" data-end=\"1952\"\u003e\n\u003cp data-start=\"1930\" data-end=\"1952\"\u003eWasher Included: Yes\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ygep3j\" data-start=\"1953\" data-end=\"1975\"\u003e\n\u003cp data-start=\"1955\" data-end=\"1975\"\u003eWasher Type: Crush\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"16jv32o\" data-start=\"1976\" data-end=\"2005\"\u003e\n\u003cp data-start=\"1978\" data-end=\"2005\"\u003eInstalled Height: 2.24 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"6ig4c\" data-start=\"2006\" data-end=\"2033\"\u003e\n\u003cp data-start=\"2008\" data-end=\"2033\"\u003eTaper Diameter: 0.31 in\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1w4gt8e\" data-start=\"2035\" data-end=\"2050\"\u003ePerformance\u003c\/h3\u003e\n\u003cul data-start=\"2051\" data-end=\"2141\"\u003e\n\u003cli data-section-id=\"1euklkx\" data-start=\"2051\" data-end=\"2082\"\u003e\n\u003cp data-start=\"2053\" data-end=\"2082\"\u003eManufacturer Heat Range: 12\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"y0newv\" data-start=\"2083\" data-end=\"2119\"\u003e\n\u003cp data-start=\"2085\" data-end=\"2119\"\u003ePre-Gap Size: 0.030 in \/ 0.78 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1fym0qk\" data-start=\"2120\" data-end=\"2141\"\u003e\n\u003cp data-start=\"2122\" data-end=\"2141\"\u003eResistor Type: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1hc7erh\" data-start=\"2143\" data-end=\"2165\"\u003eAdditional Details\u003c\/h3\u003e\n\u003cul data-start=\"2166\" data-end=\"2274\"\u003e\n\u003cli data-section-id=\"9kzcjo\" data-start=\"2166\" data-end=\"2213\"\u003e\n\u003cp data-start=\"2168\" data-end=\"2213\"\u003eElectrical Terminal Type: Non-Removable Nut\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"cf799m\" data-start=\"2214\" data-end=\"2231\"\u003e\n\u003cp data-start=\"2216\" data-end=\"2231\"\u003eHex Type: Hex\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nt2tzg\" data-start=\"2232\" data-end=\"2247\"\u003e\n\u003cp data-start=\"2234\" data-end=\"2247\"\u003eIndexed: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"198zmx6\" data-start=\"2248\" data-end=\"2274\"\u003e\n\u003cp data-start=\"2250\" data-end=\"2274\"\u003eSubject to Prop 65: No\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-section-id=\"mu966k\" data-start=\"2276\" data-end=\"2291\"\u003eApplications\u003c\/h2\u003e\n\u003cp data-start=\"2292\" data-end=\"2446\"\u003eThe \u003cstrong data-start=\"2296\" data-end=\"2318\"\u003eChampion 512 (H12)\u003c\/strong\u003e spark plug is commonly used in \u003cstrong data-start=\"2350\" data-end=\"2417\"\u003evintage automobiles, marine engines, and small engine equipment\u003c\/strong\u003e, including examples such as:\u003c\/p\u003e\n\u003cp data-start=\"2448\" data-end=\"2462\"\u003e\u003cstrong data-start=\"2448\" data-end=\"2462\"\u003eAutomotive\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2463\" data-end=\"2567\"\u003e\n\u003cli data-section-id=\"1vj2ucb\" data-start=\"2463\" data-end=\"2492\"\u003e\n\u003cp data-start=\"2465\" data-end=\"2492\"\u003eCord 810 (1936) – 4.7L V8\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7ohhd2\" data-start=\"2493\" data-end=\"2527\"\u003e\n\u003cp data-start=\"2495\" data-end=\"2527\"\u003eCord 812 (1936–1937) – 4.7L V8\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1l44yr7\" data-start=\"2528\" data-end=\"2567\"\u003e\n\u003cp data-start=\"2530\" data-end=\"2567\"\u003eHudson Hornet (1952–1954) – 5.0L L6\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2569\" data-end=\"2600\"\u003e\u003cstrong data-start=\"2569\" data-end=\"2600\"\u003eSmall Engines and Equipment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2601\" data-end=\"2821\"\u003e\n\u003cli data-section-id=\"ql9kcs\" data-start=\"2601\" data-end=\"2630\"\u003e\n\u003cp data-start=\"2603\" data-end=\"2630\"\u003eClinton J7 and J8 engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"159hp1k\" data-start=\"2631\" data-end=\"2666\"\u003e\n\u003cp data-start=\"2633\" data-end=\"2666\"\u003eMcCulloch engines and equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"e5ch7x\" data-start=\"2667\" data-end=\"2688\"\u003e\n\u003cp data-start=\"2669\" data-end=\"2688\"\u003eWest Bend engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"82gqcj\" data-start=\"2689\" data-end=\"2712\"\u003e\n\u003cp data-start=\"2691\" data-end=\"2712\"\u003eElgin small engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ni02vq\" data-start=\"2713\" data-end=\"2751\"\u003e\n\u003cp data-start=\"2715\" data-end=\"2751\"\u003eSears and Wizard branded equipment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"5aos9t\" data-start=\"2752\" data-end=\"2791\"\u003e\n\u003cp data-start=\"2754\" data-end=\"2791\"\u003eJohnson and Evinrude marine engines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"7mxqxr\" data-start=\"2792\" data-end=\"2821\"\u003e\n\u003cp data-start=\"2794\" data-end=\"2821\"\u003eAero Marine AM5000 series\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2823\" data-end=\"2941\"\u003eAdditional compatibility may include \u003cstrong data-start=\"2860\" data-end=\"2940\"\u003eFirestone, Viking, Commodore, Foremost, Perkins, and Terry Troller equipment\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 data-section-id=\"smnv30\" data-start=\"2943\" data-end=\"2958\"\u003eFitment Note\u003c\/h2\u003e\n\u003cp data-start=\"2959\" data-end=\"3090\"\u003eBecause the Champion 512 spark plug is used across many engine types and equipment brands, always verify compatibility by checking:\u003c\/p\u003e\n\u003cul data-start=\"3092\" data-end=\"3224\"\u003e\n\u003cli data-section-id=\"gdn4cf\" data-start=\"3092\" data-end=\"3130\"\u003e\n\u003cp data-start=\"3094\" data-end=\"3130\"\u003eEngine manufacturer specifications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"vpakfr\" data-start=\"3131\" data-end=\"3160\"\u003e\n\u003cp data-start=\"3133\" data-end=\"3160\"\u003eThread diameter and reach\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1fqryu7\" data-start=\"3161\" data-end=\"3189\"\u003e\n\u003cp data-start=\"3163\" data-end=\"3189\"\u003eSeat type and heat range\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ffpx1e\" data-start=\"3190\" data-end=\"3224\"\u003e\n\u003cp data-start=\"3192\" data-end=\"3224\"\u003eOEM spark plug cross-reference\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CHAMPION","offers":[{"title":"Default Title","offer_id":46286397079751,"sku":"ELE1991","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/2277\/5751\/files\/Screenshot2026-03-12160248.png?v=1773356437","url":"https:\/\/mainstreeteshop.com\/products\/champion-512-spark-plug","provider":"MAIN STREET ESHOP","version":"1.0","type":"link"}