{"product_id":"johnson-evinrude-cd-3-6-power-pack-sierra-18-99313-outboard-ignition-module","title":"Sierra Power Pack 18-99313 for Johnson Evinrude CD3\/6 Ignition Systems","description":"\u003cp\u003eThe Sierra 18-99313 is a CDI power pack built as a direct replacement component for Johnson Evinrude outboards equipped with CD3\/6 ignition systems. The power pack is the electronic control module at the heart of a CD (capacitor discharge) ignition system, storing and timing the electrical charge sent to the coils to fire the spark plugs at the correct moment in each cylinder's cycle. When a power pack begins to fail, engines typically show symptoms such as hard starting, misfiring, rough idle, loss of power at higher RPM, or a complete no-spark condition, and replacing the power pack with a properly matched unit like the 18-99313 restores reliable ignition timing and spark output.\u003c\/p\u003e\u003cp\u003eThis power pack is designed specifically for Johnson Evinrude engines running a CD3\/6 ignition system, so it should be matched against the ignition system type on the engine rather than swapped in as a universal part. Installation follows the standard power pack replacement procedure: disconnecting the wiring harness from the failed unit, mounting the new power pack in the same location, and reconnecting the harness leads in their original positions. The compact housing keeps the unit lightweight for its application, and it is sold as a complete, ready-to-install replacement module.\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 18-99313\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Outboard Power Pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson Evinrude CD3\/6 ignition systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.6 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282396121\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Johnson Evinrude outboard engines equipped with a CD3\/6 ignition system.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99313 power pack used for?\u003c\/strong\u003e It serves as the electronic ignition control module for Johnson Evinrude outboard engines running a CD3\/6 ignition system, timing and delivering the capacitor discharge that fires each cylinder's spark plug.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99313 fit any Johnson or Evinrude outboard?\u003c\/strong\u003e No. The Sierra 18-99313 is built for engines equipped specifically with a CD3\/6 ignition system, so it should be matched to that ignition type rather than installed as a universal fit across all Johnson Evinrude models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-99313 power pack weigh?\u003c\/strong\u003e The power pack weighs 0.6 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a power pack needs to be replaced?\u003c\/strong\u003e Hard starting, misfiring, rough idle, power loss at higher RPM, or a complete no-spark condition are common signs that a CD ignition power pack such as the 18-99313 has failed and needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99313 a new or remanufactured unit?\u003c\/strong\u003e The Sierra 18-99313 is sold as a new, complete power pack ready for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the power pack come with mounting hardware or a wiring harness?\u003c\/strong\u003e The 18-99313 is supplied as the power pack module itself; it is installed by reconnecting the existing engine wiring harness to the new unit in place of the failed power pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the Sierra 18-99313 myself?\u003c\/strong\u003e Installation involves disconnecting the wiring harness from the old power pack, mounting the 18-99313 in the same location, and reconnecting the harness leads, which is a straightforward swap for anyone comfortable working on outboard ignition components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat ignition system does the 18-99313 work with?\u003c\/strong\u003e It is designed for the CD3\/6 capacitor discharge ignition system used on Johnson Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99313 an OEM or aftermarket part?\u003c\/strong\u003e The 18-99313 is sold under the Sierra brand as a replacement power pack for the specified Johnson Evinrude CD3\/6 ignition application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99313 power pack?\u003c\/strong\u003e The UPC for this power pack is 808282396121.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988441772251,"sku":"SIE-18-99313","price":135.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-113-3112_lg__82424.1558111373.500.750.jpg?v=1785188228","url":"https:\/\/www.goodvibesmarina.com\/products\/johnson-evinrude-cd-3-6-power-pack-sierra-18-99313-outboard-ignition-module","provider":"Good Vibes Marina","version":"1.0","type":"link"}