{"product_id":"ignition-coil-fits-mercury-225hp-250hp-275hp-300hp-350hp-replaces-339-880615t01-880615t01","title":"Ignition Coil – Fits Mercury 225HP 250HP 275HP 300HP 350HP (Replaces 339-880615T01, 880615T01)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eIgnition Coil – Fits Mercury 225HP 250HP 275HP 300HP 350HP\u003c\/strong\u003e is an aftermarket replacement designed for Mercury outboard engines ranging from 225HP to 350HP. Engineered to deliver reliable spark ignition across high-performance applications, this coil ensures consistent engine operation and throttle response.\u003c\/p\u003e\n\u003cp\u003eDirect replacement for Mercury OEM part numbers 339-880615T01 and 880615T01, offering a cost-effective solution without compromising reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStraightforward bolt-on installation using existing mounting points\u003c\/li\u003e\n  \u003cli\u003eCompatible with gasoline-powered outboard applications\u003c\/li\u003e\n  \u003cli\u003eDesigned for marine environments with corrosion-resistant construction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e339-880615T01\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e880615T01\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003e225HP\u003c\/td\u003e\n        \u003ctd\u003e880615T01, 339-880615T01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003e250HP\u003c\/td\u003e\n        \u003ctd\u003e880615T01, 339-880615T01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003e275HP\u003c\/td\u003e\n        \u003ctd\u003e880615T01, 339-880615T01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003e300HP\u003c\/td\u003e\n        \u003ctd\u003e880615T01, 339-880615T01\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Outboard\u003c\/td\u003e\n        \u003ctd\u003e350HP\u003c\/td\u003e\n        \u003ctd\u003e880615T01, 339-880615T01\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003ePart Type\u003c\/dt\u003e\n  \u003cdd\u003eIgnition Coil\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMercury Outboard Engines\u003c\/dd\u003e\n  \u003cdt\u003eHorsepower Range\u003c\/dt\u003e\n  \u003cdd\u003e225HP – 350HP\u003c\/dd\u003e\n  \u003cdt\u003eReplaces OEM\u003c\/dt\u003e\n  \u003cdd\u003e339-880615T01, 880615T01\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1× Ignition Coil\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery negative terminal and allow the engine to cool completely.\u003c\/li\u003e\n  \u003cli\u003eLocate the faulty ignition coil on your Mercury outboard engine.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the electrical connector and remove any retaining bolts securing the old coil.\u003c\/li\u003e\n  \u003cli\u003eRemove the old ignition coil from its mounting position.\u003c\/li\u003e\n  \u003cli\u003ePosition the new ignition coil in the same location and secure with the original hardware.\u003c\/li\u003e\n  \u003cli\u003eReconnect the electrical connector, ensuring a firm and complete connection.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test engine operation before returning to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if my ignition coil is failing?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include engine misfires, rough idle, difficulty starting, reduced power, or complete loss of spark on one or more cylinders. Use a multimeter to test resistance or swap coils between cylinders to isolate the fault.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I replace just one coil or should I replace all of them?\u003c\/summary\u003e\n  \u003cp\u003eYou can replace a single faulty coil. However, if your engine has high hours or multiple coils are near the same age, replacing all at once can prevent repeat failures and simplify maintenance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this coil work with my specific engine serial number?\u003c\/summary\u003e\n  \u003cp\u003eThis coil fits Mercury outboards rated 225HP to 350HP that originally used part numbers 339-880615T01 or 880615T01. Always verify your engine's OEM part number before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the typical lifespan of an ignition coil?\u003c\/summary\u003e\n  \u003cp\u003eLifespan varies with operating conditions, but coils generally last several hundred hours. Saltwater environments, heat, and vibration can accelerate wear. Inspect coils during routine maintenance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need to gap or adjust anything after installation?\u003c\/summary\u003e\n  \u003cp\u003eNo. This ignition coil is a direct-fit replacement with no adjustment required. Ensure all electrical connections are clean and secure for optimal performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat tools are required for installation?\u003c\/summary\u003e\n  \u003cp\u003eBasic hand tools such as socket wrenches and screwdrivers are typically sufficient. A multimeter is helpful for diagnostic testing before and after replacement.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003eManufacturer-Direct Value — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025603690811,"sku":"21IC003","price":28.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/21H7OZvRiHL._SL250.jpg?v=1772927975","url":"https:\/\/seasierra.com\/products\/ignition-coil-fits-mercury-225hp-250hp-275hp-300hp-350hp-replaces-339-880615t01-880615t01","provider":"SeaSierra","version":"1.0","type":"link"}