{"product_id":"marine-ignition-coil-for-johnson-evinrude-18-25-hp-outboards-replaces-omc-581130-sierra-18-5163","title":"Sierra 18-5163 Ignition Coil, OMC 581130 Equivalent, for Johnson\/Evinrude 18-25 HP Outboards (1973-1976)","description":"\u003cp\u003eThe Sierra 18-5163 is an ignition coil built for Johnson\/Evinrude outboard motors, engineered to meet or exceed the performance of the original equipment part it replaces. It generates the high-voltage spark needed to fire the spark plugs at the correct timing, and is a direct fit for the specific horsepower and model-year combinations listed below. The coil features a female connector for a secure, factory-style electrical connection and is designed for screw-in or bolt-on installation, making it a straightforward replacement for outboards showing signs of a failing coil such as hard starting, misfiring, or intermittent power loss.\u003c\/p\u003e\u003cp\u003eSierra manufactures marine parts to withstand the harsh marine environment, and this ignition coil is no exception. It ships as a single unit and carries Sierra's standard customer satisfaction warranty. Confirm your outboard's horsepower rating and model year against the fitment details below before ordering, since ignition coil requirements vary by year even within the same horsepower class.\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 18-5163\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999318404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.56 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector Gender:\u003c\/strong\u003e Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Screw-In or Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Service Type:\u003c\/strong\u003e Outboard Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Quantity Required:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 18 HP, 1973\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 20 HP, 1973\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 25 HP, 1973-1976\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 581130\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard motors does the Sierra 18-5163 ignition coil fit?\u003c\/strong\u003e The Sierra 18-5163 fits Johnson\/Evinrude 18 HP outboards from 1973, 20 HP outboards from 1973, and 25 HP outboards from 1973 through 1976.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5163 a direct OEM replacement?\u003c\/strong\u003e Yes, it is the equivalent of OMC part number 581130 and is designed to meet or exceed the performance of the original coil it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many coils does my outboard need?\u003c\/strong\u003e For the 18, 20, and 25 HP Johnson\/Evinrude applications covered by the 18-5163, only 1 coil is required per engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this ignition coil?\u003c\/strong\u003e The Sierra 18-5163 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-5163 ignition coil weigh?\u003c\/strong\u003e It weighs 0.56 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of electrical connector does the 18-5163 use?\u003c\/strong\u003e The coil uses a female connector for a secure, factory-style electrical connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the Sierra 18-5163 installed?\u003c\/strong\u003e This ignition coil uses a screw-in or bolt-on installation type, consistent with the original equipment mounting on covered Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5163 fit a 1977 model year 25 HP Johnson\/Evinrude?\u003c\/strong\u003e No, the Sierra 18-5163 is specified for the 25 HP application from 1973 through 1976; outboards outside that range require a different coil.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with the Sierra 18-5163?\u003c\/strong\u003e The package includes one Sierra 18-5163 ignition coil, sold as a single unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5163 covered by a warranty?\u003c\/strong\u003e Yes, the Sierra 18-5163 ignition coil is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate my outboard needs a new ignition coil like the 18-5163?\u003c\/strong\u003e Hard starting, misfiring, or intermittent loss of power on a covered Johnson\/Evinrude 18, 20, or 25 HP outboard can indicate a failing ignition coil, which the 18-5163 is designed to replace.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988200206555,"sku":"SIE-18-5163","price":51.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5163_lg__34759.1558128519.500.750.jpg?v=1785188042","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-ignition-coil-for-johnson-evinrude-18-25-hp-outboards-replaces-omc-581130-sierra-18-5163","provider":"Good Vibes Marina","version":"1.0","type":"link"}