{"product_id":"ignition-coil-for-evinrude-outboard-motors-replaces-582995-584477-sierra-18-5181","title":"Sierra Ignition Coil 18-5181 for Johnson Evinrude 2-4 HP Outboards","description":"\u003cp\u003eThe Sierra 18-5181 is an ignition coil built for Johnson and Evinrude outboard motors, supplying the spark energy the ignition system needs to fire the engine reliably. It is a direct-fit replacement coil designed to match OEM electrical specifications for the applications listed below, restoring consistent spark and easier starting on engines with a weak, intermittent, or failed original coil. The coil mounts using the same footprint as the original Johnson\/Evinrude unit, allowing for straightforward removal-and-replacement service without modifying the ignition harness.\u003c\/p\u003e\u003cp\u003eCoverage spans several small outboard horsepower classes and year ranges, and on some applications the engine requires two of these coils rather than one, so confirm the coil quantity for your specific horsepower and year before ordering. This part is sold to match the manufacturer catalog application data for the Sierra 18-5181 exactly, so buyers can cross-check their outboard's horsepower and model year against the fitment list to verify correct application.\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 18-5181\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Ignition Coils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999236807\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.49 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Brands:\u003c\/strong\u003e Johnson, Evinrude (OMC\/BRP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoil Quantity Required:\u003c\/strong\u003e 1 or 2, depending on horsepower and year (see Fitment)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 2 HP, 1971-1973 (1 coil)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 2 HP, 1975-1985 (1 coil)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 3 HP, 1955-1968 (2 coils)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 3 HP, 1989-1990 (2 coils)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 4 HP, 1969-1976 (2 coils)\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 4 HP, 1981-1988 (2 coils)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard motors does the Sierra 18-5181 ignition coil fit?\u003c\/strong\u003e The Sierra 18-5181 fits Johnson\/Evinrude 2 HP outboards from 1971-1973 and 1975-1985, 3 HP outboards from 1955-1968 and 1989-1990, and 4 HP outboards from 1969-1976 and 1981-1988.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many coils does my outboard need?\u003c\/strong\u003e Some applications for the 18-5181 need only one coil while others need two. The 2 HP applications (1971-1973 and 1975-1985) each use 1 coil, while the 3 HP 1955-1968, 3 HP 1989-1990, 4 HP 1969-1976, and 4 HP 1981-1988 applications each require 2 coils.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5181 an OEM or aftermarket part?\u003c\/strong\u003e The Sierra 18-5181 is an aftermarket ignition coil manufactured by Sierra to match the electrical and mounting specifications of the original Johnson\/Evinrude coil for the listed applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-5181 ignition coil?\u003c\/strong\u003e The UPC for the Sierra 18-5181 ignition coil is 030999236807.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-5181 ignition coil weigh?\u003c\/strong\u003e The Sierra 18-5181 ignition coil weighs 0.49 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5181 fit a 1980 Johnson 4 HP outboard?\u003c\/strong\u003e No. A 1980 Johnson 4 HP falls in the 1977-1980 range, which uses a different Sierra coil (18-5176), not the 18-5181. The 18-5181 covers 4 HP outboards from 1969-1976 and 1981-1988.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5181 fit a 1995 Evinrude 3 HP outboard?\u003c\/strong\u003e No. A 1995 Evinrude 3 HP falls under the 1995-1997 range, which uses Sierra coil 18-5179, not the 18-5181.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate my ignition coil needs replacement?\u003c\/strong\u003e Weak, intermittent, or no spark, hard starting, or engine misfiring are common signs of a failing ignition coil, and the Sierra 18-5181 is designed to replace a worn coil on the applicable Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the Sierra 18-5181 straightforward?\u003c\/strong\u003e Yes, the 18-5181 uses the same mounting footprint as the original Johnson\/Evinrude coil, so it can be swapped in during standard ignition service without modifying the wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-5181 fit both Johnson and Evinrude outboards?\u003c\/strong\u003e Yes, the 18-5181 is listed for both Johnson and Evinrude (OMC\/BRP) outboard applications in the horsepower and year ranges specified.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988200665307,"sku":"SIE-18-5181","price":24.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5181_lg__55615.1558129043.500.750.jpg?v=1785329164","url":"https:\/\/www.goodvibesmarina.com\/products\/ignition-coil-for-evinrude-outboard-motors-replaces-582995-584477-sierra-18-5181","provider":"Good Vibes Marina","version":"1.0","type":"link"}