{"product_id":"wlfinkmo-ignition-coil-for-mercury-optimax-pro-75-250-hp-direct-fit-stronger-spark","title":"WLFINKMO Ignition Coil for Mercury Optimax\/Pro 75–250 HP — Direct Fit, Stronger Spark","description":"\u003cp\u003e\u003cstrong\u003eWLFINKMO replacement ignition coil for Mercury Optimax, Pro and XS outboards delivers a stronger spark to restore reliable starting and smoother running.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis high-quality ignition coil is designed as a direct fit for many Mercury outboard engines, including Optimax, Pro, Pro XS and Sport XS models across 75–250 HP ranges and several EFI 2‑ and 4‑stroke applications. It replaces numerous OEM part numbers so you can swap it in without modifying wiring or other ignition components. Whether you’re troubleshooting a misfire, poor starting or inconsistent throttle response, this coil provides a simple, cost-effective replacement to bring ignition performance back to factory-caliber levels.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Mercury engines will this ignition coil work with?\u003c\/h3\u003e\n\u003cp\u003eIt fits a wide range of Mercury Optimax and Pro series outboards. Compatible engines include 75, 90, 115, 125, 175, 200, 225 and 250 HP models, plus several 30–60 HP EFI 4‑stroke and 150–250 EFI 2‑stroke variants listed by Mercury.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOptimax\/Pro\/Pro XS\/ Sport XS 75–250 HP models\u003c\/li\u003e\n  \u003cli\u003eEFI 4‑stroke: 30, 40, 50, 60 HP\u003c\/li\u003e\n  \u003cli\u003eEFI 2‑stroke: 150, 175, 200, 225, 250 (various EFI displacements)\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for listed OEM part numbers (see product fitment)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does swapping this coil affect starting and engine response?\u003c\/h3\u003e\n\u003cp\u003eA fresh coil supplies a higher intensity spark and quicker recovery between firing events, which helps ignition consistency. That improved spark can reduce hard starting, eliminate occasional misfires and smooth acceleration under load without altering fuel or engine tuning.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStronger spark energy for crisper combustion\u003c\/li\u003e\n  \u003cli\u003eFaster coil recovery for steady multi‑cylinder firing\u003c\/li\u003e\n  \u003cli\u003eCan reduce rough idle and hesitation during throttle changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this an easy replacement and will it work with existing components?\u003c\/h3\u003e\n\u003cp\u003eYes—this coil is meant as a direct-fit replacement for the listed Mercury part numbers, so it installs in the factory location and uses the existing connectors and mounting points. You typically replace only the coil; keep the original wiring, boots and related hardware if they are in good condition.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect swap for common OEM numbers like 300-879984T01 and 8M0077471\u003c\/li\u003e\n  \u003cli\u003eNo modification to wiring or ignition modules required in most cases\u003c\/li\u003e\n  \u003cli\u003ePackage includes one ignition coil ready for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance or longevity benefits should you expect?\u003c\/h3\u003e\n\u003cp\u003eReplacing an aging coil reduces electrical losses and restores consistent spark timing across cylinders, which supports fuel combustion efficiency and throttle predictability. While not a cure-all for unrelated mechanical issues, a good coil reduces ignition‑related complaints and extends the useful service life of the ignition system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores original spark intensity and timing stability\u003c\/li\u003e\n  \u003cli\u003eHelps prevent ignition‑related misfires and stalls\u003c\/li\u003e\n  \u003cli\u003eSupports smoother cruising and easier starting in cooler or humid conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Technicians and boat owners who need a reliable, direct replacement ignition coil for Mercury Optimax, Pro and XS outboards. It's suited to anyone troubleshooting ignition problems—such as poor starting, misfires or rough throttle response—or performing preventive maintenance on 75–250 HP Mercury engines where the OEM part numbers listed must be matched. Ideal for marine mechanics, DIYers familiar with outboard ignition components, and fleet operators seeking an affordable, OEM‑compatible coil swap.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this coil replace OEM part 300-879984T01?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it directly replaces 300-879984T01 and other listed OEM numbers for compatible Mercury outboards.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install this without changing other ignition parts?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: In most cases yes; it installs using the existing wiring and boots unless those components are worn or damaged.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"WLFINKMO","offers":[{"title":"Default Title","offer_id":67587629088953,"sku":"B08C2BXTHP","price":85.9,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/wlfinkmo-ignition-coil-front-view.jpg?v=1790514532","url":"https:\/\/redleafauto.ca\/products\/wlfinkmo-ignition-coil-for-mercury-optimax-pro-75-250-hp-direct-fit-stronger-spark","provider":"Redleaf Auto","version":"1.0","type":"link"}