{"product_id":"champion-ql78yc-marine-spark-plug-938m-copper-core-nickel-electrode-bombardier-505449-505448-437929-equivalent","title":"Champion QL78YC Marine Spark Plug 938M - Copper Core, Nickel Electrode, Bombardier 505449\/505448\/437929 Equivalent","description":"\u003cp\u003eThe Champion QL78YC marine spark plug (938M) is an OE-type replacement plug built for dependable ignition performance in marine engines. It uses a copper core center electrode to increase conductivity and improve heat range control, which helps the plug resist overheating under heavy engine loads while extending electrode life. The ground electrode and center electrode tip are made of nickel, and the plug is built to conform with ISO and SAE standards for proven, repeatable performance.\u003c\/p\u003e\u003cp\u003eThis plug is engineered to resist fouling and offers strong corrosion resistance, making it well suited to the damp, high-load conditions typical of marine use. Its resistor design and flat seat type support consistent spark delivery and easier installation. The Champion QL78YC is a direct equivalent to select Bombardier outboard spark plugs, so buyers replacing an OEM Bombardier plug can cross to this part using the OEM numbers listed below.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Champion\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e CCH938M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion Plug Number:\u003c\/strong\u003e 938M \/ QL78YC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct UPC:\u003c\/strong\u003e 037551005291\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Size:\u003c\/strong\u003e 13\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreset Gap:\u003c\/strong\u003e 0.025 inch to 0.640 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Reach:\u003c\/strong\u003e 0.500 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical Terminal Type:\u003c\/strong\u003e Non-removable nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround Electrode Core Material:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Tip Material:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Electrode Core Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThe Champion QL78YC (938M) is a direct equivalent to the Bombardier OEM spark plugs listed below. This plug is not compatible with the 1989 Johnson outboard motor.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBombardier 505449\u003c\/li\u003e\n\u003cli\u003eBombardier 505448\u003c\/li\u003e\n\u003cli\u003eBombardier 437929\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Champion QL78YC spark plug also known as?\u003c\/strong\u003e This plug is also labeled 938M by Champion, and both numbers refer to the same Champion QL78YC marine spark plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this plug fit a 1989 Johnson outboard motor?\u003c\/strong\u003e No, the Champion QL78YC (938M) is specifically noted as not compatible with the 1989 Johnson outboard motor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM numbers does the QL78YC cross to?\u003c\/strong\u003e The Champion QL78YC (938M) is a direct equivalent to Bombardier OEM spark plug numbers 505449, 505448, and 437929.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the electrode material on this spark plug?\u003c\/strong\u003e The Champion QL78YC uses a copper core center electrode for conductivity, with a nickel ground electrode and a nickel center electrode tip for heat range control and wear resistance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the hex size of the Champion QL78YC?\u003c\/strong\u003e The hex size on the Champion QL78YC (938M) marine spark plug is 13\/16 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thread reach on this plug?\u003c\/strong\u003e Thread reach on the Champion QL78YC (938M) is 0.500 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the preset electrode gap?\u003c\/strong\u003e The Champion QL78YC (938M) ships with a preset gap of 0.025 inch to 0.640 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Champion QL78YC spark plug weigh?\u003c\/strong\u003e The Champion QL78YC (938M) weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat terminal type does the QL78YC use?\u003c\/strong\u003e The Champion QL78YC (938M) has a non-removable nut electrical terminal type.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Champion QL78YC resistant to fouling and corrosion?\u003c\/strong\u003e Yes, the Champion QL78YC (938M) is built to resist fouling and offers strong corrosion resistance for marine ignition systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Champion QL78YC meet any industry standards?\u003c\/strong\u003e The Champion QL78YC (938M) is built to conform with ISO and SAE standards for proven performance and durability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Champion QL78YC spark plug?\u003c\/strong\u003e The UPC for the Champion QL78YC (938M) marine spark plug is 037551005291.\u003c\/p\u003e","brand":"Champion Spark Plugs","offers":[{"title":"Default Title","offer_id":49027462856923,"sku":"CHA-QL78YC","price":4.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/QL78YC__84491.1739459049.500.750.jpg?v=1785163558","url":"https:\/\/www.goodvibesmarina.com\/products\/champion-ql78yc-marine-spark-plug-938m-copper-core-nickel-electrode-bombardier-505449-505448-437929-equivalent","provider":"Good Vibes Marina","version":"1.0","type":"link"}