{"product_id":"arco-ig008-mercruiser-v8-delco-hei-ignition-coil","title":"Arco IG008 Ignition Coil — MerCruiser V8 Delco HEI (Non-MPI)","description":"\u003ch2\u003eOEM-Grade Ignition Coil for MerCruiser V8 Delco HEI Engines\u003c\/h2\u003e\u003cp\u003eThe Arco IG008 is a direct-fit replacement ignition coil engineered for MerCruiser V8 inboard and sterndrive engines equipped with the Delco HEI ignition system. This coil is specific to carbureted and early fuel-injected V8 applications — it is \u003cstrong\u003enot\u003c\/strong\u003e compatible with MPI engines using the ECM 555 engine management system.\u003c\/p\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser V8 engines — Delco HEI ignition system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcludes:\u003c\/strong\u003e MPI engines with ECM 555\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces OEM Part Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser: 806673T1, 806673, 806673T\u003c\/li\u003e\n\u003cli\u003eSierra: 806673T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe IG008 is the correct coil for MerCruiser V8 engines running the Delco HEI ignition — a common setup on carbureted and early throttle-body injected inboards from the 1980s and early 1990s. It’s a key diagnostic component when troubleshooting a no-spark condition or weak spark on these engines. The critical fitment note here is the ECM 555 exclusion: if your engine has MPI with ECM 555, this coil will not fit — verify your ignition system type before ordering. For MerCruiser Thunderbolt ignition sensor and rotor needs on V8 engines, see the \u003ca href=\"\/products\/arco-ig001-mercruiser-ignition-sensor-57-ig001\"\u003eArco IG001 Ignition Sensor\u003c\/a\u003e and \u003ca href=\"\/products\/arco-dr004-mercruiser-rotor-57-dr004\"\u003eArco DR004 Distributor Rotor\u003c\/a\u003e.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250813272100,"sku":"57-IG008","price":206.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/57-IG008.jpg?v=1786510588","url":"https:\/\/marisolmarine.com\/products\/arco-ig008-mercruiser-v8-delco-hei-ignition-coil","provider":"Marisol Marine Company","version":"1.0","type":"link"}