{"product_id":"exciter-coil-for-nissan-tohatsu-4c-5b-5bs-outboards-replaces-tohatsu-369060210m-sierra-mpn-18-5143","title":"Sierra Exciter Coil 18-5143, Replaces Tohatsu 369060210M, Fits 4C, 5B, 5BS (2003)","description":"\u003cp\u003eThe Sierra 18-5143 is an exciter coil built as a direct replacement for the ignition system on Tohatsu 4C, 5B, and 5BS (2003) outboard motors. The exciter coil is a core component of the outboard's ignition circuit, generating the pulse of electrical energy that the CDI unit uses to fire the spark plug at the correct timing interval. When an exciter coil weakens or fails, the outboard can develop hard starting, intermittent misfires, a rough idle, or a complete no-spark condition, so replacing it with a properly matched coil restores reliable ignition output.\u003c\/p\u003e\u003cp\u003eThis coil is a bolt-on installation, designed to mount in place of the original Tohatsu exciter coil without modification. It carries the Sierra brand's standard fit and function match to the OEM part, so it installs using the factory mounting points and wiring connections. The unit measures 1 x 6 x 2.3 inches and weighs 0.33 pounds.\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 18-5143\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Exciter Coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.33 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions (L x W x H):\u003c\/strong\u003e 1 x 6 x 2.3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Service Type:\u003c\/strong\u003e PWC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282339975\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eTohatsu 4C, 5B, 5BS (2003)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eTohatsu 369060210M\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-5143 exciter coil fit?\u003c\/strong\u003e The Sierra 18-5143 fits Tohatsu 4C, 5B, and 5BS outboard motors from 2003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5143 a direct replacement for Tohatsu 369060210M?\u003c\/strong\u003e Yes, the Sierra 18-5143 exciter coil replaces Tohatsu part number 369060210M and is a bolt-on match for the factory mounting and wiring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the exciter coil weigh?\u003c\/strong\u003e The Sierra 18-5143 exciter coil weighs 0.33 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-5143 exciter coil?\u003c\/strong\u003e The Sierra 18-5143 measures 1 x 6 x 2.3 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a failing exciter coil?\u003c\/strong\u003e Hard starting, intermittent misfires, a rough idle, or a complete no-spark condition on a Tohatsu 4C, 5B, or 5BS outboard can point to a weak or failed exciter coil like the 18-5143.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-5143 require any modification to install?\u003c\/strong\u003e No, the Sierra 18-5143 is a bolt-on part that installs at the original Tohatsu exciter coil's factory mounting points.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat role does an exciter coil play in the ignition system?\u003c\/strong\u003e An exciter coil generates the electrical pulse that the CDI unit uses to fire the spark plug at the correct timing, making it a core part of the outboard's ignition circuit; the 18-5143 performs this function on supported Tohatsu models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-5143 fit other Tohatsu outboard years or models besides 4C, 5B, and 5BS 2003?\u003c\/strong\u003e The Sierra 18-5143 is specified for Tohatsu 4C, 5B, and 5BS (2003); no other years or models are listed for this part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-5143 a genuine Sierra part?\u003c\/strong\u003e Yes, the 18-5143 is manufactured and sold under the Sierra brand as an OEM-equivalent exciter coil for the listed Tohatsu applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-5143?\u003c\/strong\u003e The Sierra 18-5143 order includes the exciter coil unit itself, ready for bolt-on installation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988199977179,"sku":"SIE-18-5143","price":17.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-5143__60196.1722518385.500.750.jpg?v=1785189162","url":"https:\/\/www.goodvibesmarina.com\/products\/exciter-coil-for-nissan-tohatsu-4c-5b-5bs-outboards-replaces-tohatsu-369060210m-sierra-mpn-18-5143","provider":"Good Vibes Marina","version":"1.0","type":"link"}