{"title":"Yamaha 2-Stroke 6-40HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003e\n    This page focuses on Yamaha 2-Stroke 6–40HP outboard engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance specific to these small and mid‑range 2‑stroke models. You can also browse our main Yamaha collection at any time. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category.\n  \u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 16px; background:#0a3d62; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 6–40HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial plate on the transom bracket (usually port side) or on the swivel bracket. It shows the model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eDecode the model label: the base model (HP and family), plus suffixes indicating shaft length (S\/L\/XL), start type (M\/E), steering\/trim (T\/PTT), and a year code. Example families often seen on 40HP include series like 6H4 and 63D.\u003c\/li\u003e\n    \u003cli\u003eConfirm platform: smaller 6–25HP are typically twin‑cylinder carbureted 2‑strokes; 30–40HP models may be 2‑cylinder or 3‑cylinder depending on year.\u003c\/li\u003e\n    \u003cli\u003eCheck whether your engine is premix or oil‑injected: look for an oil tank and injection pump linkage if equipped.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003e6–9.9HP Portable Twins\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑2, carbureted 2‑Stroke; manual or electric start; short or long shaft.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e6HP, 8HP, 9.9HP 2‑Stroke portable models.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVery light, easy to service, excellent for tenders and small boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfirm prop hub and shaft length; premix ratio typically 50:1 unless factory oil injection is present.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e15–25HP Mid‑Twin Series\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑2, carbureted 2‑Stroke; manual\/remote options; some versions with oil injection.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e15HP, 20HP, 25HP 2‑Stroke models across multiple years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eStrong low‑end torque with simple maintenance; widely supported parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarb synchronization and correct prop pitch are key for top performance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e30–40HP Inline‑2 (select years)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑2, carbureted 2‑Stroke midsection with manual or power trim\/tilt options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e30HP and certain 40HP 2‑cyl variants (notably in the early–mid 1990s).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLightweight package with simple service; good hole‑shot on small hulls.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfirm cylinder count and midsection type; many parts are platform‑specific.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e40HP Inline‑3 (common mid‑1980s to 2000s)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInline‑3, carbureted 2‑Stroke; widely used across many model years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e40HP 3‑cyl families; some share components with 50HP siblings in the same series.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSmooth operation for displacement; strong mid‑range; broad parts support.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eIgnition\/charging parts and midsection components vary by year and trim\/tilt configuration—match by model label.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Yamaha 2‑Stroke engines. Always follow your official service manual and local operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck for water intrusion\/metal; replace seals if milky oil is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect condition and gap; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery season or 100 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace more often with ethanol fuel or dirty fuel supply.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 2–3 seasons or 200 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCritical for cooling; replace sooner if weak tell‑tale or overheat.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAnodes (internal\/external)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect 50 hrs; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eUse correct alloy for fresh\/salt\/brackish water.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eOil injection system (if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every season\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVerify pump linkage, screen\/filters, and tank lines; premix at 50:1 if not injected.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\"\u003eYamaha Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarburetor cleaning\/sync (multi‑carb)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAs needed; inspect annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eBalance throttle plates; clean jets to cure stumble\/rough idle.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetor\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase Service — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System — \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical — \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWeak tell‑tale \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect intake screens, tell‑tale hose, and impeller condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWater pump kit, thermostat, intake screen.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVerify prop condition\/pitch, fuel filter restriction, and carb jet cleanliness.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePropeller, fuel filter, carb rebuild kit, spark plugs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck choke\/enricher operation, primer bulb, stale fuel, and plug gap.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSpark plugs, fuel filter, carb kit, fuel line\/primer bulb.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfirm correct premix or oil injection setting; check for rich choke or low thermostat temp.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eOil injection service parts, spark plugs, thermostat.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGearcase noise \/ metal in oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect gear oil for metal\/water; check prop shaft seals and shift shaft seal.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit seal kit, prop shaft seals, drain\/fill gaskets.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome items interchange within the same family, but many parts differ between 2‑cyl and 3‑cyl 40HP platforms and across year updates. Always match by model code, serial number, and configuration (shaft length, trim\/tilt, oil injection).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eReplace the impeller every 2–3 seasons (about 200 hours) or immediately if you notice a weak tell‑tale or any overheat event. Sandy\/silty water requires more frequent service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange lower unit gear oil every 100 hours or annually. If the oil appears milky or metallic, stop using the engine and replace affected seals before further operation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the model code from the nameplate, the full serial number, shaft length (S\/L\/XL), start type (manual\/electric), steering\/trim options, and whether the engine uses premix or oil injection.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse our main Yamaha collection to get started.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 16px; background:#0a3d62; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#555;\"\u003eIf you’re unsure about your model, send us a clear photo of the nameplate and the part you need, and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"kill-stop-switch-safety-lanyard-fits-yamaha-2-stroke-6-40-hp-replaces-yamaha-6e9-82575-02-00-6e9-82575-00-00-6e9-82575-01-00-6e9-82575-09-sierra-18-65450","title":"Ignition Cut-Off Switch Assembly for Yamaha Outboards and Mercury Mariner","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\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 replacement \u003cstrong\u003eIgnition Cut-Off Switch Assembly\u003c\/strong\u003e is designed for specified Yamaha outboard engines and Mercury Mariner outboards. The switch interrupts the ignition circuit to provide a convenient way to stop the engine and replace a worn or damaged original switch assembly.\u003c\/p\u003e\n\u003cp\u003eThis is a single switch assembly. The company product record does not identify this item as a kit or state that a separate safety lanyard is included.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement ignition cut-off switch assembly for selected Yamaha and Mercury Mariner outboards.\u003c\/li\u003e\n  \u003cli\u003eSuitable for the engine applications and reference numbers listed below.\u003c\/li\u003e\n  \u003cli\u003eUse the original switch, connector and mounting arrangement to verify the physical and electrical match before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following are manufacturer reference numbers and aftermarket reference numbers listed for this replacement switch. Number listings are provided for identification; always compare the original part and connector before ordering.\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 or Reference Type\u003c\/th\u003e\n        \u003cth\u003ePart Number\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\u003e63V-82575-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e65W-82575-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e689-82575-02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e689-82575-03\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e689-82575-04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e699-82575-09\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E9-82575-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E9-82575-01\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E9-82575-02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-82575-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-82575-02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e87-97757M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e94537M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e99050M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e97757M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-65450\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003ctd\u003e9-15450 Mallory Marine\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 the engine brand, model designation, horsepower and any year condition against the lists below. Do not rely on horsepower alone because connector and switch configurations may vary.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine Model or Series\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYear or Other Condition\u003c\/th\u003e\n        \u003cth\u003eReference Numbers\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\u003eF2.5\u003c\/td\u003e\n        \u003ctd\u003e2.5\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT\/F 6–8\u003c\/td\u003e\n        \u003ctd\u003e6–8\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF9.9–F15\u003c\/td\u003e\n        \u003ctd\u003e9.9–15\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e9.9F-M\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF13.5\u003c\/td\u003e\n        \u003ctd\u003e13.5\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF25\u003c\/td\u003e\n        \u003ctd\u003e25\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003e2002 and later\u003c\/td\u003e\n        \u003ctd\u003eSee Yamaha numbers above\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003eOutboard applications listed by horsepower\u003c\/td\u003e\n        \u003ctd\u003e9.9, 15, 25, 30, 40, 48\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eModel and year not specified\u003c\/td\u003e\n        \u003ctd\u003e87-97757M, 94537M, 99050M, 97757M\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\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eIgnition Cut-Off Switch Assembly\u003c\/dd\u003e\n  \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n  \u003cdd\u003eSingle switch assembly; not identified as a kit\u003c\/dd\u003e\n  \u003cdt\u003eFunction\u003c\/dt\u003e\n  \u003cdd\u003eInterrupts the ignition circuit to stop the outboard engine\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Yamaha outboards and Mercury Mariner outboards\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eReplacement installation using the original mounting and electrical connection where compatible\u003c\/dd\u003e\n  \u003cdt\u003eMaterial and Color\u003c\/dt\u003e\n  \u003cdd\u003eNot specified in the company product record\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Ignition Cut-Off Switch Assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA separate safety lanyard is not identified as an included component in the company product record.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn the engine off and remove the ignition key before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect power according to the engine manufacturer’s service procedure.\u003c\/li\u003e\n  \u003cli\u003eAccess the original ignition cut-off switch and note the connector and wire positions.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the original switch and remove its mounting hardware.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement switch using the original mounting arrangement, if compatible.\u003c\/li\u003e\n  \u003cli\u003eReconnect the electrical connector securely and check that wiring is routed away from moving or hot components.\u003c\/li\u003e\n  \u003cli\u003eBefore operating the boat, test the switch with the engine off and confirm that the ignition circuit responds correctly.\u003c\/li\u003e\n  \u003cli\u003eAfter installation, start the engine in a safe location and verify that the switch stops the engine as intended.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm compatibility?\u003c\/summary\u003e\n  \u003cp\u003eMatch your engine brand, model designation, horsepower and any applicable year condition to the compatibility table. Also compare the original switch, connector and mounting arrangement. The listed horsepower range alone is not sufficient to confirm fitment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete safety lanyard kit?\u003c\/summary\u003e\n  \u003cp\u003eNo kit contents are stated in the company record. This product is identified as a single ignition cut-off switch assembly, and a separate safety lanyard is not listed as included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat does the ignition cut-off switch do?\u003c\/summary\u003e\n  \u003cp\u003eThe switch interrupts the ignition circuit so the outboard engine can be stopped. It is commonly operated through the boat’s engine stop-control system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I check if the replacement switch does not work?\u003c\/summary\u003e\n  \u003cp\u003eCheck that the connector is fully seated, the terminals are clean and undamaged, the wires are in the correct positions, and the switch matches the original mounting and electrical configuration. If the problem remains, consult the engine service information or a qualified marine technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I use the existing lanyard with this switch?\u003c\/summary\u003e\n  \u003cp\u003eThe company record does not specify lanyard compatibility or include a lanyard. If your original system uses a lanyard, compare the clip and switch interface before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for a replacement switch assembly. Yamaha and Mercury\/Mariner numbers shown on this page are manufacturer reference numbers used for identification and compatibility comparison; the replacement itself is not presented as a genuine OEM component.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model, horsepower, connector and mounting details before purchase.\u003c\/li\u003e\n  \u003cli\u003eDisconnect power and follow the engine manufacturer’s safety and service procedures during installation.\u003c\/li\u003e\n  \u003cli\u003eTest the engine stop function in a controlled, safe location before normal operation.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended if the ignition wiring or safety-control operation is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Replacement components for common outboard service applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Compatibility information is organized by brand, model and horsepower where available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIdentification Support\u003c\/strong\u003e — Manufacturer reference numbers are provided to help compare the original component before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723981197627,"sku":"17ES003","price":17.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/1xSafetytether_b199404e-892c-42e3-b2f8-670ea9401c31.png?v=1763039255"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-2-stroke-6-40hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}