{"product_id":"marine-spark-plug-wire-set-for-gm-350-v8-5-7l-1970-1990-replaces-mercruiser-84-816761a9-omc-503752-8-cylinder","title":"Sierra 18-8803-2 MAGFORCE Spark Plug Wire Set, 8-Cylinder, Replaces Mercury Marine 84-816761A9, OMC 503755","description":"\u003cp\u003eThe Sierra 18-8803-2 is a MAGFORCE ignition wire set built for 8-cylinder Mercury Marine and OMC engines. Sierra markets these as \"Electronics Friendly,\" meaning the wire construction is engineered to protect onboard electronic devices and electronic engine controls from radio frequency interference (RFI) and electromagnetic interference (EMI) while still delivering maximum voltage to the spark plugs. Each wire uses a mag\/wire wound core to suppress interference without sacrificing spark energy, paired with moisture-proof, molded distributor insulators that seal out water intrusion at the distributor cap connection. A high-quality conductive center carrier reinforcement maintains conductor integrity over time, and a high tensile strength outer membrane adds durability and heat resistance so the wires hold up in the engine bay.\u003c\/p\u003e\u003cp\u003eThe set is designed for exact-fit installation on the applicable engine, meaning the wires are sized and routed to match factory configuration without cutting or custom fitting. This is a complete 8-cylinder wire set, replacing the full run of factory or worn ignition wires in one kit. It is built to meet or exceed original equipment quality and is a direct fit replacement referencing multiple Mercury Marine and OMC OEM part numbers.\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 18-8803-2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Wire Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Count:\u003c\/strong\u003e 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper (core), PVC (insulation)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Diameter:\u003c\/strong\u003e 8 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Other\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282194925\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Wiring, Plug Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercury Marine and OMC 8-cylinder engines using the OEM part numbers listed below.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-28000\u003c\/li\u003e\n\u003cli\u003eMallory 9-28010\u003c\/li\u003e\n\u003cli\u003eMallory 9-28012\u003c\/li\u003e\n\u003cli\u003eMallory 9-28021\u003c\/li\u003e\n\u003cli\u003eMercruiser 84-43376A9\u003c\/li\u003e\n\u003cli\u003eMercury Marine 84-816761Q9\u003c\/li\u003e\n\u003cli\u003eMercury Marine 84-816761A9\u003c\/li\u003e\n\u003cli\u003eMercury Marine 84-813720A10\u003c\/li\u003e\n\u003cli\u003eMercury Marine 84-813720A9\u003c\/li\u003e\n\u003cli\u003eMercury Marine 84-816761Q10\u003c\/li\u003e\n\u003cli\u003eOMC 503752\u003c\/li\u003e\n\u003cli\u003eOMC 503755\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-8803-2 wire set fit?\u003c\/strong\u003e The 18-8803-2 is built for 8-cylinder Mercury Marine and OMC engines, matching the factory OEM part numbers it cross-references.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spark plug wires are in this set?\u003c\/strong\u003e This kit is a complete 8-cylinder set, so it includes enough ignition wires to replace all eight spark plug leads on the engine in one purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does the 18-8803-2 replace?\u003c\/strong\u003e It cross-references Mercury Marine 84-816761Q9, 84-816761A9, 84-813720A10, 84-813720A9, and 84-816761Q10, Mercruiser 84-43376A9, OMC 503752 and 503755, and Mallory 9-28000, 9-28010, 9-28012, and 9-28021.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-8803-2 the same quality as the original wires?\u003c\/strong\u003e Sierra manufactures this MAGFORCE wire set to meet or exceed original equipment quality, so it is built as a direct, exact-fit replacement rather than a generic substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the wires made of?\u003c\/strong\u003e Each wire in the 18-8803-2 set uses a copper core with PVC insulation, plus a mag\/wire wound core construction for interference suppression.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick are the spark plug wires?\u003c\/strong\u003e The wires in the Sierra 18-8803-2 set measure 8 millimeters in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill these wires interfere with my boat's electronics?\u003c\/strong\u003e No. Sierra designed the MAGFORCE 18-8803-2 wire set to be Electronics Friendly, suppressing radio frequency interference (RFI) and electromagnetic interference (EMI) so it does not disrupt onboard electronic devices or engine controls.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-8803-2 wire set weigh?\u003c\/strong\u003e The complete Sierra 18-8803-2 ignition wire set weighs 2.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the wire set include the distributor cap insulators?\u003c\/strong\u003e Yes, the 18-8803-2 set uses moisture-proof, molded distributor insulators to keep water out of the distributor cap connections.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy do the wires use a wound core instead of solid copper throughout?\u003c\/strong\u003e The mag\/wire wound core in the 18-8803-2 set is designed to deliver maximum voltage to the spark plugs while still suppressing RFI and EMI, which a plain solid conductor would not filter out as effectively.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation straightforward?\u003c\/strong\u003e Sierra designs the 18-8803-2 as an exact-fit wire set, so it installs using the factory routing and connections without custom cutting or fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the box?\u003c\/strong\u003e The Sierra 18-8803-2 comes as a complete 8-cylinder wiring and plug set ready to install on Mercury Marine and OMC engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988435022043,"sku":"SIE-18-8803-2","price":57.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-8803-2_lg__22716.1558140573.500.750.jpg?v=1785188223","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-spark-plug-wire-set-for-gm-350-v8-5-7l-1970-1990-replaces-mercruiser-84-816761a9-omc-503752-8-cylinder","provider":"Good Vibes Marina","version":"1.0","type":"link"}