{"product_id":"sierra-18-99251-power-pack-for-johnson-evinrude-4-8-cylinder-outboards-1985-120-300-hp-cd-ignition","title":"Sierra Power Pack 18-99251 for Johnson\/Evinrude 4-Cylinder 120\/140 HP and 8-Cylinder 275\/300 HP Outboards (1985)","description":"\u003cp\u003eThe Sierra 18-99251 is a CD ignition power pack built for Johnson\/Evinrude outboards, covering both 4-cylinder and 8-cylinder engine configurations. It supplies the capacitor discharge ignition energy that fires the spark plugs, and is a core component of the engine's ignition system, replacing a worn or failed power pack to restore reliable starting and running performance.\u003c\/p\u003e\u003cp\u003eThe unit is housed in a black plastic enclosure rated waterproof, suited to the marine environment. It connects through a proprietary 3-pin main power connector and runs on an AC power source, matching the factory ignition wiring on the covered engines. The compact, sealed design is built to hold up to engine bay vibration, heat, and moisture exposure over time.\u003c\/p\u003e\u003cp\u003eThis power pack is compatible with Johnson\/Evinrude 1985 120 HP and 140 HP 4-cylinder outboards, as well as 275 HP and 300 HP 8-cylinder outboards. It is a direct fit for these specific engine and horsepower combinations, so confirm your engine's model year and horsepower rating before ordering.\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 18-99251\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engines:\u003c\/strong\u003e Johnson\/Evinrude 1985 120 HP and 140 HP (4-cylinder), 275 HP and 300 HP (8-cylinder) outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Configuration:\u003c\/strong\u003e 4-cylinder and 8-cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Type:\u003c\/strong\u003e Proprietary\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Power Connector Type:\u003c\/strong\u003e 3 Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Source:\u003c\/strong\u003e AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecial Feature:\u003c\/strong\u003e Waterproof\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.9 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 1985 120 HP and 140 HP outboards (4-cylinder)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 1985 275 HP and 300 HP outboards (8-cylinder)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e113-3072\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-99251 power pack fit?\u003c\/strong\u003e The 18-99251 fits Johnson\/Evinrude 1985 outboards rated 120 HP and 140 HP on 4-cylinder engines, and 275 HP and 300 HP on 8-cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-99251 cross-reference to any other part number?\u003c\/strong\u003e Yes, Sierra part 18-99251 replaces OEM part number 113-3072.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does this power pack actually do?\u003c\/strong\u003e It is a capacitor discharge (CD) ignition component that generates and delivers the spark energy needed to fire the spark plugs on the covered Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99251 power pack waterproof?\u003c\/strong\u003e Yes, this power pack is rated waterproof, which suits its use in a marine engine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and material is the housing?\u003c\/strong\u003e The 18-99251 power pack has a black plastic enclosure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99251 power pack weigh?\u003c\/strong\u003e It weighs 0.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of electrical connection does this power pack use?\u003c\/strong\u003e The 18-99251 uses a proprietary 3-pin main power connector and runs on an AC power source.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-99251 power pack work on outboards other than the listed 4-cylinder and 8-cylinder models?\u003c\/strong\u003e This power pack is confirmed to fit Johnson\/Evinrude 1985 120\/140 HP 4-cylinder and 275\/300 HP 8-cylinder outboards; fitment for other engines is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes one power pack cover both the 4-cylinder and 8-cylinder engines?\u003c\/strong\u003e Yes, Sierra 18-99251 is designed to cover both the 4-cylinder (120\/140 HP) and 8-cylinder (275\/300 HP) Johnson\/Evinrude engine configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-99251 a new replacement unit?\u003c\/strong\u003e Yes, the 18-99251 is a replacement power pack for Johnson\/Evinrude 4\/8-cylinder outboards, not a rebuilt or used unit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988440494299,"sku":"SIE-18-99251","price":160.66,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-113-3072_lg__05001.1558111176.500.750.jpg?v=1785188871","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99251-power-pack-for-johnson-evinrude-4-8-cylinder-outboards-1985-120-300-hp-cd-ignition","provider":"Good Vibes Marina","version":"1.0","type":"link"}