{"product_id":"sierra-18-99270-inductive-spark-plug-wire-11-5-inch-single-booted-for-mercury-outboard-cdm-ignition","title":"Sierra 18-99270 CDM Inductive Spark Plug Wire, 11.5 Inch, Single Booted, for Mercury Outboard Engines","description":"\u003cp\u003eThe Sierra 18-99270 is a single-booted CDM inductive spark plug wire measuring 11.5 inches, built for Mercury outboard engines that use inductive-type ignition components. It is designed as a direct replacement for a worn, cracked, or arcing spark plug wire, delivering the ignition spark from the powerhead's ignition system to the spark plug so the cylinder fires reliably. The single boot on the wire seats over the spark plug terminal to maintain a secure, weather-resistant connection in the engine compartment.\u003c\/p\u003e\u003cp\u003eA degraded spark plug wire is a common cause of misfires, hard starting, and rough idle in outboard motors, and replacing it with a properly sized, application-specific wire like the 18-99270 helps restore consistent spark delivery. At 0.11 pounds, this is a lightweight, single-cylinder wire intended to be matched to the correct position on a Mercury outboard powerhead using CDM inductive ignition.\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 18-99270\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e CDM Inductive Spark Plug Wire, Single Booted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 11.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoot Configuration:\u003c\/strong\u003e Single booted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type:\u003c\/strong\u003e CDM inductive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282395162\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury outboard engines using CDM inductive ignition\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers available\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99270 spark plug wire used for?\u003c\/strong\u003e The Sierra 18-99270 is a single-booted CDM inductive spark plug wire that carries ignition spark from a Mercury outboard's ignition system to the spark plug, used to replace a worn or damaged wire on the powerhead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the 18-99270 spark plug wire?\u003c\/strong\u003e It measures 11.5 inches in length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99270 wire have one boot or two?\u003c\/strong\u003e The 18-99270 is a single-booted wire, with one boot that seats over the spark plug terminal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of ignition system is the 18-99270 designed for?\u003c\/strong\u003e This wire is built for CDM inductive ignition systems, as used on compatible Mercury outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99270 weigh?\u003c\/strong\u003e The 18-99270 spark plug wire weighs 0.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99270 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99270 is the Sierra manufacturer part number for this CDM inductive spark plug wire.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99270 fit any outboard brand?\u003c\/strong\u003e The 18-99270 CDM inductive spark plug wire is designed for Mercury outboard engines that use CDM inductive ignition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat signs indicate a spark plug wire like the 18-99270 needs replacing?\u003c\/strong\u003e Misfires, hard starting, and rough idle can point to a degraded spark plug wire, and replacing it with a correctly fitted wire such as the 18-99270 helps restore consistent spark delivery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-99270?\u003c\/strong\u003e The 18-99270 is supplied as a single spark plug wire with its boot attached, ready to install on the applicable cylinder position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-99270 be used as a single-cylinder replacement rather than a full set?\u003c\/strong\u003e Yes, the 18-99270 is sold as an individual 11.5 inch single-booted wire, allowing replacement of just the affected cylinder's wire rather than an entire ignition harness.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988440461531,"sku":"SIE-18-99270","price":21.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-934-7124_lg__68993.1558113519.500.750.jpg?v=1785329147","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99270-inductive-spark-plug-wire-11-5-inch-single-booted-for-mercury-outboard-cdm-ignition","provider":"Good Vibes Marina","version":"1.0","type":"link"}