{"product_id":"sierra-18-99327-ignition-pack-for-yamaha-3-cylinder-outboards-cdi-unit","title":"Sierra Ignition Pack for Yamaha 3-Cylinder Outboards, Part 18-99327","description":"\u003cp\u003eThe Sierra 18-99327 is an ignition pack (CDI unit) built for Yamaha 3-cylinder outboard engines. The ignition pack is the module that manages spark timing and delivery to the engine's cylinders, and a worn or failing unit is a common cause of hard starting, misfires, rough idle, or a no-spark condition on Yamaha 3-cylinder outboards. Replacing the ignition pack with a properly matched unit restores reliable spark output and consistent engine performance.\u003c\/p\u003e\u003cp\u003eThis unit is sold under Sierra part number 18-99327 and is categorized specifically for Yamaha outboard CDI applications, making it a straightforward like-for-like replacement for boat owners and marine technicians servicing Yamaha 3-cylinder powerheads. The compact ignition pack is lightweight at under a pound, simplifying handling and installation in tight outboard cowling spaces.\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 18-99327\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition Pack (CDI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e Yamaha 3-cylinder outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396213\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha 3-cylinder outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99327 ignition pack fit?\u003c\/strong\u003e The Sierra 18-99327 ignition pack is built for Yamaha 3-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99327 a CDI unit or a full ignition system?\u003c\/strong\u003e It is an ignition pack (CDI module) that controls spark timing and delivery, not a complete ignition harness or full wiring kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the ignition pack weigh?\u003c\/strong\u003e The Sierra 18-99327 weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate the ignition pack needs replacing?\u003c\/strong\u003e On Yamaha 3-cylinder outboards, a failing ignition pack commonly causes hard starting, misfires, rough idling, or a complete loss of spark.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99327 an OEM part or an aftermarket replacement?\u003c\/strong\u003e 18-99327 is a Sierra-branded ignition pack manufactured as a replacement part for Yamaha 3-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this ignition pack work on Yamaha 4-cylinder or V6 outboards?\u003c\/strong\u003e No. The Sierra 18-99327 is designed specifically for Yamaha 3-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99327 ignition pack?\u003c\/strong\u003e The UPC for this part is 808282396213.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the ignition pack myself?\u003c\/strong\u003e The 18-99327 ignition pack mounts in place of the original Yamaha unit; installation requires basic hand tools and familiarity with outboard ignition wiring, and a marine technician can perform the swap if you are unsure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the ignition pack come with mounting hardware or wiring?\u003c\/strong\u003e The listing covers the Sierra 18-99327 ignition pack itself; no additional components are specified as included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose Sierra for a replacement ignition pack?\u003c\/strong\u003e Sierra manufactures the 18-99327 specifically for Yamaha 3-cylinder outboard applications, giving boat owners a dedicated replacement option for this engine family.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988441706715,"sku":"SIE-18-99327","price":498.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-117-6J8-H1_lg__59689.1558113063.500.750.jpg?v=1785329166","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99327-ignition-pack-for-yamaha-3-cylinder-outboards-cdi-unit","provider":"Good Vibes Marina","version":"1.0","type":"link"}