{"product_id":"sierra-18-99254-ignition-coil-primary-wire-set-for-mercury-mariner-v6-outboards","title":"Sierra Ignition Coil Primary Wire Set for Mercury Mariner V6 Outboards - 18-99254","description":"\u003cp\u003eThe Sierra 18-99254 Ignition Coil Primary Wire Set is a replacement primary wiring harness designed for Mercury Mariner V6 outboard engines. It carries the low-voltage primary current from the ignition system to the coil, and a worn, cracked, or corroded primary wire set is a common cause of misfires, hard starting, or intermittent ignition faults on V6 outboards. Replacing the primary wire set with a properly fitted harness like the 18-99254 restores a clean, secure electrical connection at the coil and helps the ignition system deliver consistent spark.\u003c\/p\u003e\u003cp\u003eThis wire set is built specifically for the V6 configuration used across Mercury and Mariner outboard engines, so it is sized and terminated to match the factory primary coil wiring layout rather than being a generic cut-to-fit wire. At 0.3 pounds, it is a light, compact part that is straightforward to route through existing engine wiring channels during a coil or ignition service.\u003c\/p\u003e\u003cp\u003eBuyers servicing Mercury or Mariner V6 outboards use this primary wire set when replacing a damaged or deteriorated coil wire, during a full ignition tune-up, or when troubleshooting an intermittent spark condition traced back to the primary wiring.\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 18-99254\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury Mariner V6 outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Ignition coil primary wire set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99254 ignition coil wire set fit?\u003c\/strong\u003e The Sierra 18-99254 is built for Mercury Mariner V6 outboard engines, matching the factory primary coil wiring layout used on that engine family.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this part actually do?\u003c\/strong\u003e It is a primary wire set that carries low-voltage current from the ignition system to the coil on Mercury Mariner V6 outboards, part number 18-99254.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99254 wire set weigh?\u003c\/strong\u003e It weighs 0.3 pounds, making the Sierra 18-99254 primary wire set a lightweight, compact component to install.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace my ignition coil primary wire set?\u003c\/strong\u003e A cracked, corroded, or loose primary wire set is a common cause of misfires and hard starting; replacing it with the 18-99254 restores a secure connection to the coil on Mercury Mariner V6 outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99254 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99254 is the Sierra manufacturer part number for this Mercury Mariner V6 ignition coil primary wire set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this wire set fit a 4-cylinder or V8 Mercury outboard?\u003c\/strong\u003e No, the Sierra 18-99254 primary wire set is designed specifically for the V6 configuration of Mercury Mariner outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99254 include the coil itself?\u003c\/strong\u003e No, the Sierra 18-99254 is the primary wire set only, used to connect the existing ignition coil in Mercury Mariner V6 outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this wire set help with an intermittent spark problem?\u003c\/strong\u003e Yes, replacing a worn primary wire set such as the 18-99254 is a standard step when troubleshooting intermittent spark or ignition faults on Mercury Mariner V6 outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-99254 something I can do myself?\u003c\/strong\u003e Because it is a direct-fit primary wire set for Mercury Mariner V6 outboards, the Sierra 18-99254 is routed through the existing wiring channels in place of the old wire during a standard coil or ignition service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra make both port and starboard versions of this wire set?\u003c\/strong\u003e The dossier for the Sierra 18-99254 does not distinguish a port or starboard version; it is listed as the primary wire set for the Mercury Mariner V6 engine configuration.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988440264923,"sku":"SIE-18-99254","price":68.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-934-9738_lg__72428.1722382332.500.750.jpg?v=1785188457","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99254-ignition-coil-primary-wire-set-for-mercury-mariner-v6-outboards","provider":"Good Vibes Marina","version":"1.0","type":"link"}