{"product_id":"marine-spark-plug-wire-set-for-mercruiser-sterndrive-and-omc-6-cylinder-est-engines-replaces-84-813720a11-sierra-18-8810-1","title":"Sierra 18-8810-1 MagForce Marine Spark Plug Wire Set, 6-Cylinder, for Mercruiser Sterndrive and OMC Engines","description":"\u003cp\u003eThe Sierra 18-8810-1 is a premium MagForce marine spark plug wire set built for 6-cylinder Mercruiser Sterndrive and OMC engines with EST Electronic ignition. Each wire uses a Kevlar core paired with a durable stainless steel wound conductor, delivering the electrical conductivity needed for consistent horsepower and reliable engine performance. The wires are finished with premium silicone jacketing and silicone boots that hold up under sustained high engine-bay temperatures, protecting the set from heat degradation over time. Silicone construction also provides superior RFI suppression, which matters for boats running sensitive onboard electronics, gauges, and marine electronics that can otherwise pick up ignition interference.\u003c\/p\u003e\u003cp\u003eTerminal ends are stainless steel at both the spark plug and distributor connections, resisting the corrosion that saltwater and engine-bay moisture cause on lesser terminal materials, so the set maintains conductivity and a solid connection over its service life. The set is finished in white and is a direct fit for the 6-cylinder Mercruiser Sterndrive and OMC applications it is designed for. As with all Sierra parts, buyers should verify this is the correct wire set for their specific engine application before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-8810-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Cylinders:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e EST Electronic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Terminal Block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Material:\u003c\/strong\u003e Kevlar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Material:\u003c\/strong\u003e Stainless Steel Wound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJacket\/Boot Material:\u003c\/strong\u003e Silicone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.37 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282194390\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6-cylinder Mercruiser Sterndrive engines\u003c\/li\u003e\n\u003cli\u003e6-cylinder OMC engines\u003c\/li\u003e\n\u003cli\u003eEST Electronic ignition systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e84-813720A11\u003c\/li\u003e\n\u003cli\u003e84-816761Q16\u003c\/li\u003e\n\u003cli\u003e503751\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-8810-1 spark plug wire set fit?\u003c\/strong\u003e The 18-8810-1 is designed for 6-cylinder Mercruiser Sterndrive and OMC engines that use EST Electronic ignition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many cylinders does this wire set cover?\u003c\/strong\u003e This is a 6-cylinder set, matching the number of spark plug wires needed for a 6-cylinder Mercruiser Sterndrive or OMC engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-8810-1 replace?\u003c\/strong\u003e It replaces Mercruiser Stern Drive numbers 84-813720A11 and 84-816761Q16, as well as OMC number 503751.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-8810-1 is a Sierra-manufactured MagForce wire set, sold as a direct replacement carrying Sierra's own part number and warranty coverage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the wire core made of?\u003c\/strong\u003e Each wire in the Sierra 18-8810-1 set has a Kevlar core paired with a stainless steel wound conductor for durability and consistent electrical performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill these wires hold up to engine heat?\u003c\/strong\u003e Yes, the 18-8810-1 uses premium silicone jacketing and silicone boots specifically for high-temperature protection in the engine bay.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo these wires cause interference with onboard electronics?\u003c\/strong\u003e No, the silicone construction of the 18-8810-1 set provides superior RFI suppression, which helps prevent ignition interference with sensitive electronic systems on board.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-8810-1 wire set?\u003c\/strong\u003e This spark plug wire set is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8810-1 weigh?\u003c\/strong\u003e The Sierra 18-8810-1 spark plug wire set weighs 1.37 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the terminal ends resistant to corrosion?\u003c\/strong\u003e Yes, the spark plug and distributor terminal ends on the 18-8810-1 are stainless steel, which resists corrosion for maximum conductivity over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-8810-1?\u003c\/strong\u003e The 18-8810-1 includes the complete set of spark plug wires with terminal ends for a 6-cylinder Mercruiser Sterndrive or OMC engine application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm the 18-8810-1 is correct for my boat?\u003c\/strong\u003e Because ignition wire sets are application-specific, verify the 18-8810-1 matches your engine's cylinder count and EST Electronic ignition setup before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988435251419,"sku":"SIE-18-8810-1","price":48.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8810-1_lg__53975.1558140709.500.750.jpg?v=1785188661","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-spark-plug-wire-set-for-mercruiser-sterndrive-and-omc-6-cylinder-est-engines-replaces-84-813720a11-sierra-18-8810-1","provider":"Good Vibes Marina","version":"1.0","type":"link"}