{"product_id":"sierra-18-8807-1-magforce-marine-spark-plug-wire-set-replaces-omc-503747-fits-omc-cobra-sterndrive-4-cylinder-engines-white","title":"Sierra 18-8807-1 Spark Plug Wire Set, Replaces OMC 503747, for OMC Sterndrive\/Cobra 2.3L 4-Cylinder Engines","description":"\u003cp\u003eThe Sierra 18-8807-1 is a premium MagForce spark plug wire set engineered for OMC Sterndrive\/Cobra stern drive engines. Built with a Kevlar core for durability and long service life, the wires use a durable stainless steel wound conductor to support maximum horsepower and engine performance. Premium silicone jacketing and boots provide high-temperature protection at the plug and distributor connections, while the construction delivers superior RFI suppression for engines running sensitive electronic systems. Corrosion-resistant stainless steel spark plug and distributor terminals maintain reliable conductivity in the marine environment. This wire set is designed to replace OMC 503747 and is the correct plug wire set for OMC Sterndrive\/Cobra 2.3L 4-cylinder engines from 1987 to 1990. The set includes one full set of wires sized for a 4-cylinder engine, ready to install as a direct replacement for worn, cracked, or misfiring original wires.\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 18-8807-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Spark Plug Wire Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Kevlar, Silicone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor:\u003c\/strong\u003e Stainless steel wound conductor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e Corrosion resistant stainless steel spark plug and distributor terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Count:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 503747\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC Sterndrive\/Cobra 2.3L, 4-cylinder, 1987-1990\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 503747\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-8807-1 spark plug wire set fit?\u003c\/strong\u003e The 18-8807-1 is designed for OMC Sterndrive\/Cobra 2.3L, 4-cylinder engines built from 1987 to 1990.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this wire set replace OMC 503747?\u003c\/strong\u003e Yes, the Sierra 18-8807-1 is a direct replacement for OMC part number 503747.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the wire set made of?\u003c\/strong\u003e It is built with a Kevlar core and a durable stainless steel wound conductor, wrapped in premium silicone jacketing and boots for high-temperature protection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plug wires are in the 18-8807-1 set?\u003c\/strong\u003e The set is sized for a 4-cylinder engine, providing one wire per cylinder to match the OMC Sterndrive\/Cobra 2.3L application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8807-1 wire set weigh?\u003c\/strong\u003e This Sierra spark plug wire set weighs 1.12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the terminals corrosion resistant?\u003c\/strong\u003e Yes, the 18-8807-1 uses corrosion resistant stainless steel spark plug and distributor terminals for reliable conductivity in marine conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this wire set help with RFI interference?\u003c\/strong\u003e Yes, the silicone jacketing and construction of the 18-8807-1 provide superior RFI suppression, which benefits engines with sensitive electronic systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8807-1 an OEM or aftermarket part?\u003c\/strong\u003e The 18-8807-1 is a Sierra-branded aftermarket wire set manufactured as a direct replacement for OMC 503747.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I replace my spark plug wires with the 18-8807-1?\u003c\/strong\u003e Cracked, worn, or degraded silicone jacketing on original wires can cause misfires and RFI interference; the 18-8807-1 restores proper spark delivery with new Kevlar-core, stainless steel wound wires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-8807-1 on a 6-cylinder or 8-cylinder OMC engine?\u003c\/strong\u003e No, the 18-8807-1 is sized specifically for the 4-cylinder 2.3L OMC Sterndrive\/Cobra application; other cylinder counts require a different Sierra plug wire set.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988434596059,"sku":"SIE-18-8807-1","price":47.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-8807-1__30286.1737892603.500.750.jpg?v=1785187976","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-8807-1-magforce-marine-spark-plug-wire-set-replaces-omc-503747-fits-omc-cobra-sterndrive-4-cylinder-engines-white","provider":"Good Vibes Marina","version":"1.0","type":"link"}