{"product_id":"champion-ql86c-marine-spark-plug-933m-fits-yamaha-f2-5-f8-f9-9-t8-t9-9-outboards","title":"Champion QL86C Marine Spark Plug 933M - Fits Yamaha F2.5, F8, F9.9, T8, T9.9 Outboards","description":"\u003cp\u003eThe Champion QL86C marine spark plug (Champion Spark Plug # 933M) is a quality OEM-replacement plug built for the demands of outboard engine operation. It uses a copper core center electrode that increases conductivity and improves heat control, helping the plug wear evenly over its service life instead of degrading unevenly under sustained load. The copper core design also gives the plug superior corrosion resistance and helps it resist fouling, both common failure points for spark plugs that run in humid marine environments and see frequent heat cycling.\u003c\/p\u003e\u003cp\u003eThis plug is engineered for dependable, proven performance under heavy engine loads and heat, and is intended as a direct replacement in outboard motors that specify the QL86C \/ 933M plug. It is a straightforward drop-in maintenance part for routine tune-ups or as a replacement when an existing plug is fouled, worn, or misfiring. Buyers replacing plugs on compatible Yamaha outboards can order this part with confidence that it matches the original electrode design and heat range.\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 CCH933M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion Product Code:\u003c\/strong\u003e QL86C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChampion Spark Plug Number:\u003c\/strong\u003e 933M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 037551005260\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Material:\u003c\/strong\u003e Copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 14 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e Yamaha F2.5, F8, F9.9, T8, T9.9 outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKey Features:\u003c\/strong\u003e Resists fouling, superior corrosion resistance, increased conductivity and heat control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha F2.5, 1 cylinder, 4-Stroke, 2.5 HP\u003c\/li\u003e\n\u003cli\u003eYamaha F8, 2 cylinder, L2 4-Stroke, 8 HP, 197cc\u003c\/li\u003e\n\u003cli\u003eYamaha F9.9, 2 cylinder, L2 4-Stroke, 9.9 HP, 212cc\u003c\/li\u003e\n\u003cli\u003eYamaha T8, 2 cylinder, L2 4-Stroke, 8 HP, 197cc\u003c\/li\u003e\n\u003cli\u003eYamaha T9.9, 2 cylinder, L2 4-Stroke, 9.9 HP, 212cc\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBombardier 503953\u003c\/li\u003e\n\u003cli\u003eBombardier 437682\u003c\/li\u003e\n\u003cli\u003eBombardier 503949\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Champion QL86C (933M) spark plug fit?\u003c\/strong\u003e This plug fits Yamaha F2.5 (1 cylinder, 4-Stroke, 2.5 HP), F8 and T8 (2 cylinder, L2 4-Stroke, 8 HP, 197cc), and F9.9 and T9.9 (2 cylinder, L2 4-Stroke, 9.9 HP, 212cc) outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the QL86C a genuine OEM part or an aftermarket equivalent?\u003c\/strong\u003e The Champion QL86C, also identified as Champion 933M, is manufactured by Champion as a quality OEM-replacement spark plug, not a generic aftermarket clone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM numbers does the Champion 933M cross reference to?\u003c\/strong\u003e It cross-references to Bombardier part numbers 503953, 437682, and 503949, so any of those OEM numbers can be used to confirm this is the correct plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the electrode material in this spark plug?\u003c\/strong\u003e The Champion QL86C uses a copper core center electrode, which increases conductivity and gives more precise control over heat range for longer plug life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the Champion 933M spark plug use?\u003c\/strong\u003e This spark plug has a 14 millimeter thread size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Champion QL86C spark plug weigh?\u003c\/strong\u003e The Champion QL86C (part CCH933M \/ 933M) weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this plug resist fouling in marine use?\u003c\/strong\u003e Yes, the copper core design in the Champion 933M is built to resist fouling and provide superior corrosion resistance, which matters in the humid, heat-cycling conditions outboard engines run in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this spark plug handle heavy engine loads without overheating?\u003c\/strong\u003e Champion designed the QL86C marine spark plug to resist overheating under heavy engine loads while maintaining dependable, proven performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plugs come in one order?\u003c\/strong\u003e Each order of the Champion QL86C (933M) is for a single spark plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this plug work in a Yamaha F9.9 outboard?\u003c\/strong\u003e Yes, the Champion 933M\/QL86C is specified for the Yamaha F9.9, a 2 cylinder, L2 4-Stroke, 9.9 HP, 212cc engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between the QL86C and other Champion marine plugs like the QL82YC?\u003c\/strong\u003e The QL86C (Champion 933M) and QL82YC (Champion 932M) are different Champion marine spark plug part numbers built for different outboard applications, so they are not interchangeable without confirming your engine's specified plug number.\u003c\/p\u003e","brand":"Champion Spark Plugs","offers":[{"title":"Default Title","offer_id":49027462955227,"sku":"CHA-QL86C","price":4.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/QL86C__31954.1739459057.500.750.jpg?v=1785163558","url":"https:\/\/www.goodvibesmarina.com\/products\/champion-ql86c-marine-spark-plug-933m-fits-yamaha-f2-5-f8-f9-9-t8-t9-9-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}