{"product_id":"66m-85570-00-00-ignition-coil-for-yamaha-f9-9-t9-9-f15-jlm-marine","title":"66M-85570-00-00 Ignition Coil for Yamaha F9.9 T9.9 F15 | JLM Marine","description":"\u003ch2\u003eIgnition Coil for Yamaha F9.9 T9.9 F15 Outboard Motors\u003c\/h2\u003e\n\n\u003cp\u003eThis aftermarket ignition coil is designed for Yamaha 4-stroke outboard engines ranging from 9.9HP to 15HP. It provides reliable spark delivery for smooth engine performance across the F9.9, T9.9, and F15 series motors manufactured between 1998 and 2006.\u003c\/p\u003e\n\n\u003cp\u003eThis replacement ignition coil directly supersedes Yamaha OEM part numbers 66M-85570-00, 66M-85570-01, 66M-85570-02, and 66M-85570-03, as well as Sierra part number 18-23601, ensuring broad compatibility across multiple model years.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eSingle ignition coil assembly for consistent spark generation\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Yamaha 4-stroke outboard motors\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\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\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e66M-85570-00-00\u003c\/td\u003e\n\u003ctd\u003ePrimary OEM Number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e66M-85570-00\u003c\/td\u003e\n\u003ctd\u003eSuperseded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e66M-85570-01\u003c\/td\u003e\n\u003ctd\u003eSuperseded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e66M-85570-02\u003c\/td\u003e\n\u003ctd\u003eSuperseded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e66M-85570-03\u003c\/td\u003e\n\u003ctd\u003eSuperseded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-23601\u003c\/td\u003e\n\u003ctd\u003eAftermarket Equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF9.9\u003c\/td\u003e\n\u003ctd\u003e9.9HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005-2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eT9.9\u003c\/td\u003e\n\u003ctd\u003e9.9HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005-2006\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15\u003c\/td\u003e\n\u003ctd\u003e15HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998-2005\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eOutboard Motor Ignition Coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Type\u003c\/td\u003e\n\u003ctd\u003eYamaha Outboard 9.9HP 15HP 4-Stroke Motors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e66M-85570-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis package includes the following component:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 × Ignition Coil\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and remove the engine cowling to access the ignition system. Locate the existing ignition coil mounted on the engine block.\u003c\/li\u003e\n\u003cli\u003eDisconnect the spark plug wire from the top of the old ignition coil. Take note of the wire routing for reinstallation.\u003c\/li\u003e\n\u003cli\u003eDisconnect the electrical connectors from the base of the ignition coil. Label connectors if necessary to ensure correct reconnection.\u003c\/li\u003e\n\u003cli\u003eRemove the mounting bolts securing the ignition coil to the engine using the appropriate socket or wrench. Keep hardware for reuse if in good condition.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the old ignition coil from its mounting bracket. Inspect the mounting area and clean any debris or corrosion.\u003c\/li\u003e\n\u003cli\u003ePosition the new ignition coil in the mounting bracket, aligning the bolt holes. Ensure proper orientation matching the original installation.\u003c\/li\u003e\n\u003cli\u003eInstall the mounting bolts and tighten to manufacturer specifications using a torque wrench. Do not overtighten to avoid damaging the coil housing.\u003c\/li\u003e\n\u003cli\u003eReconnect the electrical connectors to the base of the new ignition coil, ensuring they click securely into place. Verify connections are firm.\u003c\/li\u003e\n\u003cli\u003eAttach the spark plug wire to the top terminal of the new ignition coil. Route the wire following the original path to prevent chafing.\u003c\/li\u003e\n\u003cli\u003eReinstall the engine cowling and reconnect the battery. Double-check all connections before proceeding.\u003c\/li\u003e\n\u003cli\u003eStart the engine and allow it to idle for several minutes. Listen for smooth operation and confirm there are no misfires.\u003c\/li\u003e\n\u003cli\u003eIf the engine runs smoothly without hesitation, installation is complete. If issues persist, recheck all connections and consult a marine technician.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this ignition coil fits my specific Yamaha engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's model and year with the compatibility table above. You can also verify the OEM part number stamped on your existing ignition coil matches one of the listed numbers (66M-85570-00, 66M-85570-01, 66M-85570-02, 66M-85570-03, or Sierra 18-23601).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my ignition coil needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include difficulty starting the engine, misfiring or rough idling, loss of power under load, or the engine stalling unexpectedly. If spark testing shows weak or no spark at the plug, the ignition coil is often the culprit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the ignition coil?\u003c\/strong\u003e\u003cbr\u003e\nA: Ignition coils typically last several years under normal operating conditions. Replace the coil if you experience ignition-related performance issues, or as preventive maintenance every 5-7 years or 500-700 operating hours, especially in harsh marine environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or an aftermarket replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n\u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981000999225,"sku":"23IC153","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/A0bd85467f81b42cea6f3a95a1734ddbco.webp?v=1772455641","url":"https:\/\/jlmmarine.com\/ru\/products\/66m-85570-00-00-ignition-coil-for-yamaha-f9-9-t9-9-f15-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}