{"product_id":"7-spark-plug-wire-fits-mercury-marine-150-200-hp-outboard-motors-replaces-18-8819-813715a1-90816a25","title":"7\" Spark Plug Wire – Fits Mercury Marine 150-200 HP Outboard Motors (Replaces 18-8819, 813715A1, 90816A25)","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis high-performance \u003cstrong\u003e7\" Spark Plug Wire\u003c\/strong\u003e is a direct-fit replacement for Mercury Marine 150-200 HP V6 outboard motors manufactured between 1970 and 1988, including V-150, V-175, and V-200 series engines. Engineered for reliability in harsh marine environments, it ensures a stable and powerful connection for optimal ignition performance.\u003c\/p\u003e\n    \u003cp\u003eIt serves as a direct interchange for Sierra part number 18-8819 and numerous Mercury OEM numbers, ensuring a precise match for your engine's ignition system. This part is ideal for routine maintenance or for resolving ignition-related issues.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eSimple direct replacement installation with no modification required.\u003c\/li\u003e\n        \u003cli\u003eMarine-grade construction resists heat, saltwater corrosion, vibration, and fuel exposure.\u003c\/li\u003e\n        \u003cli\u003eNote: Different wire lengths (5\", 9\", 12\") are available for these engines depending on the specific cylinder position.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n    \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket brands.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n            \u003cthead\u003e\n                \u003ctr\u003e\n                    \u003cth\u003eBrand\u003c\/th\u003e\n                    \u003cth\u003ePart Number\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSierra\u003c\/td\u003e\n                    \u003ctd\u003e18-8819\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e813715A1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e90816A25\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e93475A25\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e99215A25\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e99215A29\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e20114A2\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e20122A2\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e23564A4\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e23564A5\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e23564A6\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e23564A8\u003c\/td\u003e\n                \u003c\/tr\u003e\n                 \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e23564A9\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e26453A1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e26460A1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e47899A9\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e63212A2\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e697331\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e70668\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e73451A8\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e762238\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n    \u003cp\u003eConfirm your engine model and year in the table below. Verifying the OEM part number and serial range for your specific application is crucial for ensuring a correct fit.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n            \u003cthead\u003e\n                \u003ctr\u003e\n                    \u003cth\u003eBrand\u003c\/th\u003e\n                    \u003cth\u003eModel\u003c\/th\u003e\n                    \u003cth\u003eRated HP\u003c\/th\u003e\n                    \u003cth\u003eStroke\u003c\/th\u003e\n                    \u003cth\u003eYears\u003c\/th\u003e\n                    \u003cth\u003eOEM Part No.\u003c\/th\u003e\n                    \u003cth\u003eNotes\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-150\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 4868998-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-150 Magnum\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 5600162-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-150 Marathon\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 5600162-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-150 Work\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 4868998-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-150-XR-2\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 4868998-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-1500\u003c\/td\u003e\n                    \u003ctd\u003e150\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 4868998-0A904645\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-175\u003c\/td\u003e\n                    \u003ctd\u003e175\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 4301235-0C100860, 8058870-UP\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eV-200\u003c\/td\u003e\n                    \u003ctd\u003e200\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1970–1988\u003c\/td\u003e\n                    \u003ctd\u003e813715A1, 90816A25\u003c\/td\u003e\n                    \u003ctd\u003eSerial range: 5239232-0C100860\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n    \u003cdl\u003e\n        \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eSpark Plug Wire\u003c\/dd\u003e\n        \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n        \u003cdt\u003eLength\u003c\/dt\u003e\n\u003cdd\u003e7 inches (178 mm)\u003c\/dd\u003e\n        \u003cdt\u003eCompatible With\u003c\/dt\u003e\n\u003cdd\u003eMercury Marine outboard engines\u003c\/dd\u003e\n        \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eSilicone insulation with stainless steel components\u003c\/dd\u003e\n        \u003cdt\u003eConnection Type\u003c\/dt\u003e\n\u003cdd\u003eTerminal end connects to coil\/distributor, boot end connects to spark plug\u003c\/dd\u003e\n        \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n        \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1 Year (retailer dependent)\u003c\/dd\u003e\n        \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eMarine-grade construction resistant to heat, saltwater corrosion, vibration, and fuel exposure\u003c\/dd\u003e\n    \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1\u003c\/span\u003e x 7\" Spark Plug Wire (Replaces 813715A1, 90816A25)\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSafety First:\u003c\/strong\u003e Before starting, disconnect the boat's battery to prevent electrical shock.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eOne at a Time:\u003c\/strong\u003e To avoid mixing up firing order, replace one spark plug wire at a time. Start with the first cylinder.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eRemove Old Wire:\u003c\/strong\u003e Firmly grip the spark plug boot, twist slightly, and pull it straight off the spark plug. Do the same on the distributor\/coil end.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eCompare and Match:\u003c\/strong\u003e Before installing, compare the new wire to the old one to ensure the length and boot angles match.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eInstall New Wire:\u003c\/strong\u003e Lightly apply dielectric grease to the inside of both boots. Push the new wire's boot firmly onto the spark plug until you feel it click into place. Repeat for the distributor\/coil end.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFinal Check:\u003c\/strong\u003e Once all wires are replaced, reconnect the battery and start the engine to ensure it runs smoothly.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow do I know this 7\" wire is the correct length for my engine?\u003c\/summary\u003e\n        \u003cp\u003eThis 7-inch wire is designed for specific cylinder positions on the listed Mercury V6 engines. Different cylinders may require different lengths (e.g., 5\", 9\", 12\"). Always measure your existing wire or consult your engine's service manual to confirm you are ordering the correct length for the cylinder you are servicing.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs of a bad spark plug wire?\u003c\/summary\u003e\n        \u003cp\u003eCommon symptoms of a failing spark plug wire include a rough idle, engine misfires (especially under load), decreased fuel economy, and visible signs of damage like cracks, burns, or corrosion on the wire or boots.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow does this aftermarket wire compare to an OEM Mercury part?\u003c\/summary\u003e\n        \u003cp\u003eThis wire is built to meet or exceed OEM specifications for fit, material quality, and performance. It is made with high-quality silicone insulation and stainless steel terminals, just like the original, to provide reliable conductivity and long life in marine conditions.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat is the recommended replacement interval for spark plug wires?\u003c\/summary\u003e\n        \u003cp\u003eIt is good practice to inspect spark plug wires annually for any signs of wear or damage. A general recommendation is to replace them every 3-5 years or as part of a major ignition system tune-up, depending on usage and a-environmental conditions.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eCan I install just one wire, or should I replace the whole set?\u003c\/summary\u003e\n        \u003cp\u003eWhile you can replace a single faulty wire, it is generally recommended to replace all spark plug wires as a complete set. This ensures consistent performance, resistance, and age across the entire ignition system, preventing future issues with the older wires.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eThe connection seems loose. What should I do?\u003c\/summary\u003e\n        \u003cp\u003eEnsure you have pushed the boot onto the spark plug and distributor\/coil terminal firmly. You should feel or hear a distinct \"click\" as it snaps into place. A light coating of dielectric grease inside the boot can help with seating and sealing.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n        \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n        \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n        \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n    \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n        \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n        \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723781706043,"sku":"24SP086","price":21.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/7_inches_Spark_Plug_Wire_fits_Mercury_Marine_150_175_200_HP_Outboard_Motors______18-8819_-_JLM_MARINE-8286634.jpg?v=1763031650","url":"https:\/\/seasierra.com\/products\/7-spark-plug-wire-fits-mercury-marine-150-200-hp-outboard-motors-replaces-18-8819-813715a1-90816a25","provider":"SeaSierra","version":"1.0","type":"link"}