{"product_id":"sierra-ignition-coil-delco-est-hei-mercruiser-omc-volvo-penta-sie-18-5443","title":"Sierra Marine Ignition Coil — Delco EST\/HEI, MerCruiser\/OMC\/Volvo Penta, Replaces Mercury 817378 | SIE-18-5443","description":"\u003cp\u003eThe Sierra \u003cstrong\u003e18-5443\u003c\/strong\u003e is a marine \u003cstrong\u003eignition coil\u003c\/strong\u003e used in select \u003cstrong\u003eMercury, MerCruiser, OMC, Volvo Penta, and Crusader\u003c\/strong\u003e applications. Current cross-reference listings identify it as replacing \u003cstrong\u003eMercury 817378, 817378T, and 898253T27\u003c\/strong\u003e, along with \u003cstrong\u003eOMC 3854002\u003c\/strong\u003e and \u003cstrong\u003eVolvo Penta 3854002-7\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis coil is commonly described for \u003cstrong\u003eDelco EST \/ HEI-style ignition and high-performance applications\u003c\/strong\u003e, with current Sierra-linked fitment references centered on \u003cstrong\u003einboard and sterndrive engine families\u003c\/strong\u003e, not general 2-stroke outboard use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSierra part number: \u003cstrong\u003e18-5443\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMarine ignition coil\u003c\/li\u003e\n\u003cli\u003eReplaces \u003cstrong\u003eMercury 817378 \/ 817378T \/ 898253T27\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplaces \u003cstrong\u003eOMC 3854002\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplaces \u003cstrong\u003eVolvo Penta 3854002-7\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCommonly listed for \u003cstrong\u003eDelco EST \/ HEI ignition\u003c\/strong\u003e applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003cbr\u003eCurrent fitment references support applications including \u003cstrong\u003e3.0L (1991 and newer)\u003c\/strong\u003e, \u003cstrong\u003e5.7 EFI (1996 and newer)\u003c\/strong\u003e, and \u003cstrong\u003e7.4 EFI (1995 and newer)\u003c\/strong\u003e, with additional listings broadly describing fitment for \u003cstrong\u003elate-model GM marine engines with Delco EST distributors\u003c\/strong\u003e. Fitment should be confirmed by exact engine model and serial number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003cbr\u003eFitment should be verified using the \u003cstrong\u003eengine model and serial number\u003c\/strong\u003e, along with the existing coil’s OEM number. Matching by \u003cstrong\u003eSierra 18-5443\u003c\/strong\u003e or the supported OEM cross-reference number is the safest method.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003cbr\u003eReplace the ignition coil if there is weak or intermittent spark, hard starting, misfire under load, or confirmed coil failure during ignition-system testing. This guidance is based on the function of the part; the cited sources mainly confirm identity and fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003cbr\u003eInstall only where \u003cstrong\u003e18-5443\u003c\/strong\u003e or the matching OEM cross-reference is specified. Confirm ignition-system type and engine application before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlternate \/ Superseded Part Numbers when applicable\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e18-5443\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e817378\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e817378T\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e898253T27\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3854002\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e3854002-7\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e7243200\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003cbr\u003eThe most important thing on \u003cstrong\u003e18-5443\u003c\/strong\u003e is matching the \u003cstrong\u003eignition system and engine family\u003c\/strong\u003e, not just the connector style. Current fitment support points to \u003cstrong\u003eDelco EST \/ HEI-type marine engine applications\u003c\/strong\u003e, so serial-number confirmation matters before listing it against a specific engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43943903658020,"sku":"SIE-18-5443","price":187.91,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/7a30e531-de0e-4381-b429-350f2000b084.png?v=1775358440","url":"https:\/\/marisolmarine.com\/products\/sierra-ignition-coil-delco-est-hei-mercruiser-omc-volvo-penta-sie-18-5443","provider":"Marisol Marine Company","version":"1.0","type":"link"}