{"product_id":"beseloa-champion-marine-spark-plugs-ql77jc4-pack-of-6-14mm-thread-12-7mm-reach-copper-core","title":"beseloa Champion marine spark plugs QL77JC4 Pack of 6 — 14mm thread, 12.7mm reach, copper core","description":"\u003cp\u003e\u003cstrong\u003eThese are six genuine Champion copper-core marine spark plugs (QL77JC4-6PK) designed as direct OEM replacements for compatible outboard engines and marine applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhether you're servicing an outboard motor before the season or replacing worn plugs mid-summer, this pack gives you six standard, solid-terminal Champion spark plugs with a 14mm thread and 12.7mm reach. Bulk-packed and new, they match the OEM part number QL77JC4-6PK and offer the familiar copper construction favored for traditional ignition systems. Always verify fitment against your owner's manual and the compatibility list before installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines use the Champion 828M QL77JC4 spark plug?\u003c\/h3\u003e\n\u003cp\u003eThis Champion part is intended for marine outboard engines and other applications that originally specify QL77JC4 or equivalent Champion part numbers. Fitment depends on thread, reach, and seat type rather than model alone.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread size: 14mm — check your engine’s cylinder head thread.\u003c\/li\u003e\n  \u003cli\u003eReach (insert length): 12.7mm — ensure correct reach to avoid piston or combustion issues.\u003c\/li\u003e\n  \u003cli\u003eSeat type: flat — confirm your cylinder head uses a flat seating surface.\u003c\/li\u003e\n  \u003cli\u003eCompare OEM part numbers (QL77JC4-6PK) with your owner’s manual or dealer parts list.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these copper spark plugs perform in marine conditions?\u003c\/h3\u003e\n\u003cp\u003eCopper-core Champion plugs provide dependable ignition in conventional magneto and coil systems commonly found in marine outboards. They offer consistent electrical conductivity and straightforward gap maintenance, making them a practical choice for routine replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCopper center electrode for reliable conductivity in standard ignition systems.\u003c\/li\u003e\n  \u003cli\u003eSolid terminal type for secure spark wire or lead connections.\u003c\/li\u003e\n  \u003cli\u003eNon‑projected tip and standard heat range suitable for many outboard designs.\u003c\/li\u003e\n  \u003cli\u003eBulk-packed for fleet servicing or multi-plug engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key specifications to confirm before buying?\u003c\/h3\u003e\n\u003cp\u003eVerifying a few measurements prevents installation issues and engine damage. Cross‑check thread, reach, hex size, and tip configuration against your engine’s requirements.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: 14mm — matches head threads on specified engines.\u003c\/li\u003e\n  \u003cli\u003eReach: 12.7mm (0.5\") — critical for correct combustion chamber placement.\u003c\/li\u003e\n  \u003cli\u003eSeat type: flat — must match cylinder head sealing surface.\u003c\/li\u003e\n  \u003cli\u003eHex size: 21mm — standard tool size for installation and removal.\u003c\/li\u003e\n  \u003cli\u003eTip configuration: non-projected — avoids extended electrode contact in some chambers.\u003c\/li\u003e\n  \u003cli\u003eTerminal: solid — for traditional cap or lead attachment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain these spark plugs?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward but must follow torque and gap specifications to protect the engine. Use the owner’s manual for correct procedures and a torque wrench to avoid overtightening.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm correct part number and measurements before installation.\u003c\/li\u003e\n  \u003cli\u003eSet or verify gap per engine manufacturer recommendations.\u003c\/li\u003e\n  \u003cli\u003eTighten to specified torque using a 21mm socket and torque wrench.\u003c\/li\u003e\n  \u003cli\u003eInspect electrodes periodically and replace plugs in matched sets for multi-cylinder engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This pack of six Champion copper marine spark plugs is suited to boat owners, marine service shops, and fleet managers who need OEM-equivalent replacements for compatible outboard engines. It’s ideal when you require multiple plugs for multi-cylinder motors, prefer a proven copper-core design for conventional ignition systems, and want bulk-packed new parts that match the QL77JC4-6PK OEM specification. If you're unsure of fitment, consult your engine owner’s manual or a certified dealer to confirm thread, reach, and seat compatibility before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these plugs genuine Champion replacements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — this pack contains genuine Champion plugs matching OEM part QL77JC4-6PK, sold new and bulk-packed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use these in any marine outboard?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Only if your engine specifies 14mm thread, 12.7mm reach, flat seat, and the QL77JC4 part; check your owner’s manual.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"beseloa","offers":[{"title":"Default Title","offer_id":67589581570233,"sku":"B07PHH3V4S","price":74.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/beseloa-champion-828m-front-packaging.jpg?v=1790530891","url":"https:\/\/redleafauto.ca\/products\/beseloa-champion-marine-spark-plugs-ql77jc4-pack-of-6-14mm-thread-12-7mm-reach-copper-core","provider":"Redleaf Auto","version":"1.0","type":"link"}