{"product_id":"yamaha-3-cylinder-outboard-ignition-pack-sierra-mpn-18-99241-marine-ignition-system","title":"Sierra Ignition Pack 18-99241 for Yamaha 3-Cylinder Outboard Engines","description":"\u003cp\u003eThe Sierra 18-99241 is an ignition pack built for Yamaha outboard engines with a 3-cylinder configuration. The ignition pack (also called a CDI module or power pack) is the electronic control unit that manages spark timing and delivers the high-voltage pulse to the ignition coils, which in turn fire the spark plugs in the correct sequence. On a 3-cylinder outboard, a failing or worn ignition pack commonly shows up as hard starting, a rough or uneven idle, misfiring under load, reduced top-end power, or a complete no-spark condition on one or more cylinders. Replacing a weak or failed unit with the 18-99241 restores consistent spark delivery and helps the engine return to normal starting and running performance.\u003c\/p\u003e\u003cp\u003eThis ignition pack is sold as a direct-fit replacement unit for the applicable Yamaha 3-cylinder outboard ignition system, allowing installation in place of the original factory component using the engine's existing wiring harness connections.\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 18-99241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Yamaha Outboard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Count:\u003c\/strong\u003e 3 Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282394073\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engine does the Sierra 18-99241 ignition pack fit?\u003c\/strong\u003e The Sierra 18-99241 is built for Yamaha outboard engines with a 3-cylinder configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does an ignition pack do on a 3-cylinder outboard?\u003c\/strong\u003e It is the electronic control module that times and delivers the high-voltage pulse to the ignition coils so each cylinder fires in the correct sequence; the 18-99241 performs this function on applicable Yamaha 3-cylinder outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99241 ignition pack weigh?\u003c\/strong\u003e The Sierra 18-99241 weighs 1.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing ignition pack?\u003c\/strong\u003e Hard starting, a rough or uneven idle, misfiring under load, lost power at higher RPM, or no spark on one or more cylinders are common signs pointing to a failing ignition pack like the 18-99241.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99241 a direct replacement for the factory Yamaha ignition pack?\u003c\/strong\u003e Yes, the Sierra 18-99241 is designed to install using the existing engine wiring harness connections on the applicable Yamaha 3-cylinder outboard ignition system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99241 come with mounting hardware or wiring?\u003c\/strong\u003e The 18-99241 is supplied as the ignition pack unit itself; it connects to the outboard's existing wiring harness during installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this ignition pack be used on a 2-cylinder or 4-cylinder Yamaha outboard?\u003c\/strong\u003e No, the Sierra 18-99241 is specifically configured for 3-cylinder Yamaha outboard engines and is not intended for engines with a different cylinder count.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99241 ignition pack?\u003c\/strong\u003e The UPC for the Sierra 18-99241 Yamaha ignition pack is 808282394073.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99241 a new or remanufactured part?\u003c\/strong\u003e The 18-99241 is sold as a new ignition pack unit for Yamaha 3-cylinder outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would a boat with a bad ignition pack still crank but not start?\u003c\/strong\u003e If the starter motor turns the engine over but no spark reaches the cylinders, the ignition pack is a likely cause; the 18-99241 restores that spark delivery on applicable Yamaha 3-cylinder outboards.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988440363227,"sku":"SIE-18-99241","price":625.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-117-63D-04_lg__53462.1558112127.500.750.jpg?v=1785188237","url":"https:\/\/www.goodvibesmarina.com\/products\/yamaha-3-cylinder-outboard-ignition-pack-sierra-mpn-18-99241-marine-ignition-system","provider":"Good Vibes Marina","version":"1.0","type":"link"}