{"title":"Mercury 70-300HP 4-Stroke Outboard Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page is tailored for Mercury 4-Stroke 70–300HP outboard engines. Use it to find compatible parts and practical service guidance. Below you’ll find maintenance tips, common replacement parts, and troubleshooting advice. You can also browse our main Mercury collection for a wider selection. 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 by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #333;border-radius:6px;text-decoration:none;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 70–300HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the engine serial number tag on the swivel bracket or clamp bracket; it may also appear on an instruction plate near the tilt tube.\u003c\/li\u003e\n    \u003cli\u003eUse the serial number to determine exact model, production year range, and gearcase variant before ordering parts.\u003c\/li\u003e\n    \u003cli\u003eSuffix letters often indicate shaft length (L\/XL\/XXL) and configuration (tiller vs. remote). Verify these to ensure correct driveshaft\/water pump parts.\u003c\/li\u003e\n    \u003cli\u003eDistinguish platforms: mid‑range inline‑4 FourStroke (typically 70–150 HP) vs. larger V6 FourStroke\/Verado families (commonly 175–300 HP). Service parts such as impellers and anodes can differ by platform and gearcase size.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eEngine Platform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eInline‑4 FourStroke (approx. 70–150 HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;max-width:960px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInline‑4 EFI 4‑stroke outboards focused on efficiency and mid‑range torque.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e75\/90\/115 FourStroke; 150 FourStroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGood fuel economy, relatively light weight, broad parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eImpeller and seal kits vary by gearcase (commonly 4.25\" on many 75–115 and 4.75\" on 150). Verify gearcase and serial number before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV6 FourStroke\/Verado Families (approx. 175–300 HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;max-width:960px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eV6 EFI 4‑stroke platforms; some earlier Verado models use additional induction\/charging components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e175\/200\/225\/250\/300 FourStroke \u0026amp; Verado variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eHigh output, strong charging capacity, robust offshore gearcases.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWater pump and anode kits differ by gearcase size and mid‑section options. Always match parts by serial number and gearcase (e.g., standard vs. high‑performance cases).\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=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are typical guidelines for Mercury 4‑stroke outboards; always follow your engine’s official service manual and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;max-width:960px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWarm engine before draining; replace crush washer if applicable.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect magnetic drain plug for metal; replace seals if damaged.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e100–300 hrs (usage dependent)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCheck gap and replace if fouled or out of spec.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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:8px 0;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eDrain bowl (if equipped) and replace element; use fresh fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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:8px 0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e2–3 seasons or 200 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eReplace sooner if weak tell‑tale or overheat alarm occurs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect often; replace when 30–50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eChoose alloys for your water type (salt, brackish, fresh).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\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=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury 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\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;max-width:960px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect intake screens, flush passages, and impeller condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWater pump kit, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCheck prop condition\/pitch, fuel quality, and fuel filter restriction.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eVerify battery state, plug gap, and for water in fuel separator.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eSpark plugs, fuel filter, starter circuit components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGearcase noise or metal on magnet\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCheck gear oil level and seals; look for water intrusion (milky oil).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eLower unit seal kit, bearings, drain\/fill seals\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eLow or erratic charging voltage\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eTest battery connections, fuses, and rectifier\/regulator output.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eRectifier\/regulator, fuses, wiring\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=\"padding:16px 0;\"\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 service items fit multiple years, but many components differ between inline‑4 and V6 platforms and by gearcase size. Always confirm by serial number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb every 2–3 seasons or about 200 hours. Replace sooner if the tell‑tale is weak, the engine overheats, or you operate in sand\/silt.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change gear oil?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100 hours or annually. Inspect the oil for milkiness (water intrusion) and the drain plug magnet for metal. Replace seals if damaged.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full engine serial number, horsepower, shaft length (L\/XL\/XXL), and whether the unit is an inline‑4 or V6. Photos of the nameplate and the part area are also helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find exact‑fit parts? Browse the Mercury collection by horsepower, year, and model to locate the right components for your engine.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #333;border-radius:6px;text-decoration:none;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#555;\"\u003eIf you’re unsure about your model, send us a 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":"water-pump-impeller-kit-fits-yamaha-70-300-hp-replaces-67f-12411-01-00-67f-12411-00-00-6cb-12411-00-00","title":"Yamaha 4-Stroke Outboard Thermostat Replacement – Replaces 67F-12411-01-00, 67F-12411-00-00 and 6CB-12411-00-00","description":"\u003csection\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:560px; }\n    table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n    table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n    @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n  \u003c\/style\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis aftermarket \u003cstrong\u003ethermostat replacement\u003c\/strong\u003e is designed for selected Yamaha 4-stroke outboards. It helps regulate engine operating temperature as part of the cooling system and is intended to replace the original thermostat when inspection or scheduled maintenance indicates service is required.\u003c\/p\u003e\n    \u003cp\u003eCatalog references identify this thermostat application with Yamaha part numbers \u003cstrong\u003e67F-12411-01-00\u003c\/strong\u003e, \u003cstrong\u003e67F-12411-00-00\u003c\/strong\u003e, and \u003cstrong\u003e6CB-12411-00-00\u003c\/strong\u003e. These references are supplied for identification and cross-reference purposes only. Confirm the complete engine model, year, and serial-number range before ordering.\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003eAftermarket replacement thermostat for selected Yamaha 4-stroke outboards.\u003c\/li\u003e\n      \u003cli\u003eSupports proper cooling-system temperature regulation.\u003c\/li\u003e\n      \u003cli\u003eDirect replacement application where the listed reference number and engine conditions match.\u003c\/li\u003e\n      \u003cli\u003eThermostat only; this listing is not a water-pump impeller kit.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003ePart Number References\u003c\/h2\u003e\n    \u003cp\u003eThe following Yamaha numbers are associated with the thermostat application covered by this listing:\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n      \u003ctable class=\"ss-table\" aria-label=\"Thermostat part number references\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eReference number\u003c\/th\u003e\n\u003cth\u003eApplication note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e67F-12411-01-00\u003c\/td\u003e\n\u003ctd\u003eReplacement reference for selected F-series applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e67F-12411-00-00\u003c\/td\u003e\n\u003ctd\u003eReference appearing in earlier selected F-series applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6CB-12411-00-00\u003c\/td\u003e\n\u003ctd\u003eReference associated with selected VF-series applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n    \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Part-number appearance alone does not confirm interchangeability. Match the engine model, model year, stroke, and serial-number range against your original part and the applicable service information.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n    \u003cp\u003eAvailable catalog data identifies the following Yamaha 4-stroke applications or application families. The ranges below are not a substitute for a complete model and serial-number check.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n      \u003ctable class=\"ss-table\" aria-label=\"Yamaha thermostat compatibility\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or model family\u003c\/th\u003e\n\u003cth\u003eHorsepower\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYear or serial condition\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF75-F250\u003c\/td\u003e\n\u003ctd\u003e75-250 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005 and newer application range listed in catalog\u003c\/td\u003e\n\u003ctd\u003e67F-12411-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF80, F100, F200, F225 and related F-series models\u003c\/td\u003e\n\u003ctd\u003e80-225 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 2001-2002 applications identified in engine catalogs\u003c\/td\u003e\n\u003ctd\u003e67F-12411-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eVF225LA and VF250LA\u003c\/td\u003e\n\u003ctd\u003e225-250 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2010 model applications identified in engine catalogs\u003c\/td\u003e\n\u003ctd\u003e6CB-12411-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eModel suffixes, shaft versions, production changes, and serial-number breaks can affect fitment. If your model is not shown, compare the thermostat dimensions and reference number with the manufacturer's parts information before purchase.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n    \u003cdl\u003e\n      \u003cdt\u003eProduct type\u003c\/dt\u003e\n      \u003cdd\u003eEngine thermostat replacement\u003c\/dd\u003e\n      \u003cdt\u003eApplication\u003c\/dt\u003e\n      \u003cdd\u003eSelected Yamaha 4-stroke outboard cooling systems\u003c\/dd\u003e\n      \u003cdt\u003eReplacement style\u003c\/dt\u003e\n      \u003cdd\u003eDirect replacement where application and reference number match\u003c\/dd\u003e\n      \u003cdt\u003ePrimary reference numbers\u003c\/dt\u003e\n      \u003cdd\u003e67F-12411-01-00, 67F-12411-00-00, 6CB-12411-00-00\u003c\/dd\u003e\n      \u003cdt\u003eBrand status\u003c\/dt\u003e\n      \u003cdd\u003eAftermarket replacement; not an original Yamaha component\u003c\/dd\u003e\n    \u003c\/dl\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003e1 x Replacement thermostat\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003eGaskets, seals, housings, water-pump components, and other service parts are not included unless specifically shown or stated in the order information.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n      \u003cli\u003eAllow the engine to cool completely and disconnect the battery before beginning service.\u003c\/li\u003e\n      \u003cli\u003eLocate the thermostat housing using the service manual for the exact engine model.\u003c\/li\u003e\n      \u003cli\u003eRemove the housing cover carefully and note the position of the original thermostat, gasket, and seal.\u003c\/li\u003e\n      \u003cli\u003eClean the mating surfaces and inspect the housing for corrosion, damage, or obstruction.\u003c\/li\u003e\n      \u003cli\u003eInstall the replacement thermostat in the correct orientation using the appropriate new gasket or seal when required.\u003c\/li\u003e\n      \u003cli\u003eReassemble the housing and tighten fasteners according to the engine manufacturer's specified procedure and torque.\u003c\/li\u003e\n      \u003cli\u003eRun the engine with an adequate water supply and check for leaks, overheating warnings, and normal cooling-system operation.\u003c\/li\u003e\n    \u003c\/ol\u003e\n    \u003cp\u003eBecause thermostat housings and sealing requirements vary by model, use the applicable Yamaha service manual for detailed procedures and torque specifications.\u003c\/p\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eMaintenance \u0026amp; Troubleshooting\u003c\/h2\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat are signs of a thermostat problem?\u003c\/summary\u003e\n      \u003cp\u003ePossible symptoms include abnormal operating temperature, overheating warnings, poor temperature regulation, restricted cooling-water flow, or a thermostat that remains open or closed. These symptoms can also be caused by other cooling-system faults, so inspect the complete system before replacing parts.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this a water-pump impeller kit?\u003c\/summary\u003e\n      \u003cp\u003eNo. This listing is for a thermostat replacement. It does not include a water-pump impeller, insert cup, wear plate, key, or water-pump housing components.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n      \u003cp\u003eCompare the reference number on your original thermostat and verify the complete engine make, horsepower, model designation, year, stroke, and serial-number range. Do not rely on horsepower alone.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\n      \u003cp\u003eNo. This is an aftermarket replacement intended for the applications identified above. Yamaha is a trademark of its respective owner and is used only to identify compatibility.\u003c\/p\u003e\n    \u003c\/details\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n    \u003cul\u003e\n      \u003cli\u003eWork only on a cool engine and follow the applicable service manual.\u003c\/li\u003e\n      \u003cli\u003eVerify the part number, model, year, stroke, and serial-number conditions before installation.\u003c\/li\u003e\n      \u003cli\u003eDo not operate an outboard that shows overheating, cooling-system leaks, or warning alarms until the cause has been identified.\u003c\/li\u003e\n      \u003cli\u003eProfessional installation is recommended if you are not experienced with outboard cooling-system service.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection\u003e\n    \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n    \u003cp\u003eSea Sierra supplies aftermarket marine replacement parts for routine maintenance and repair. Select the part by verified application details rather than by horsepower alone, and contact support if you need help comparing your original part with the listed references.\u003c\/p\u003e\n  \u003c\/section\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723788292411,"sku":"23KY720","price":95.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_70_to_300_HP_67F-12411-01_-_JLM_MARINE-8289395.jpg?v=1763031779"},{"product_id":"thermostat-60-c-140-f-fits-suzuki-yamaha-johnson-evinrude-mercury-4-stroke-70-300hp-replaces-suzuki-17670-90j00-yamaha-67f-12411-01-00","title":"60°C\/140°F Outboard Thermostat for Yamaha, Suzuki, Honda and Johnson\/Evinrude 4-Stroke Engines","description":"\u003csection\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis replacement \u003cstrong\u003e60°C\/140°F outboard thermostat\u003c\/strong\u003e is designed to regulate engine operating temperature in selected 4-stroke outboard cooling systems. It is supplied as a single thermostat and is intended for the Yamaha, Suzuki, Honda and Johnson\/Evinrude applications listed below.\u003c\/p\u003e\n\u003cp\u003eThe thermostat opens at approximately \u003cstrong\u003e60°C (140°F)\u003c\/strong\u003e, helping the engine reach and maintain its specified operating temperature when the cooling system is functioning correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle replacement thermostat for selected 4-stroke outboard engines.\u003c\/li\u003e\n  \u003cli\u003e60°C (140°F) opening temperature.\u003c\/li\u003e\n  \u003cli\u003eUse the complete engine model, year and serial-number information where applicable to confirm fitment before ordering.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement; not an original manufacturer component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eThe following manufacturer and aftermarket numbers are listed as references for this replacement thermostat. A part-number match should still be confirmed against the specific engine application.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or source\u003c\/th\u003e\n\u003cth\u003eReference number\u003c\/th\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e67F-12411-01\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6CB-12411-00\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e67F-12411-00-00\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-90J00\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-90J01\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93J00\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003e19300-ZX2-003\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\/OMC\u003c\/td\u003e\n\u003ctd\u003e5033721\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e0769254\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3632\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eCompany fitment records identify the following 4-stroke outboard applications. Model designations, production years and serial-number ranges can vary by market and configuration; compare your engine identification label and original thermostat before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModels or configuration\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eTemperature\u003c\/th\u003e\n\u003cth\u003eFitment notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF80A, F80B, F100A, F100B, F150A, F200A, F200C, F225A, F225B, F225C, F250A, F250B\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e60°C \/ 140°F\u003c\/td\u003e\n\u003ctd\u003eConfirm the exact model designation and year.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF70, DF90, DF115, DF140, DF175, DF200, DF225, DF250, DF300\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e60°C \/ 140°F\u003c\/td\u003e\n\u003ctd\u003eCompany records include model-specific year ranges; verify the engine label before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e4-cylinder 90 hp, 115 hp and 140 hp; 6-cylinder 200 hp and 225 hp\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e60°C \/ 140°F\u003c\/td\u003e\n\u003ctd\u003eConfirm the engine configuration and applicable manufacturer reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eBF175D, BF200D, BF225D, BF250A\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e60°C \/ 140°F\u003c\/td\u003e\n\u003ctd\u003eManufacturer reference listed as 19300-ZX2-003.\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\u003cdl\u003e\n  \u003cdt\u003eProduct type\u003c\/dt\u003e\n\u003cdd\u003eOutboard engine thermostat\u003c\/dd\u003e\n  \u003cdt\u003eProduct configuration\u003c\/dt\u003e\n\u003cdd\u003eSingle thermostat\u003c\/dd\u003e\n  \u003cdt\u003eOpening temperature\u003c\/dt\u003e\n\u003cdd\u003e60°C (140°F)\u003c\/dd\u003e\n  \u003cdt\u003eEngine type\u003c\/dt\u003e\n\u003cdd\u003eSelected 4-stroke outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eInstalls in the engine thermostat housing according to the applicable service procedure\u003c\/dd\u003e\n  \u003cdt\u003eConstruction material\u003c\/dt\u003e\n\u003cdd\u003eNot specified in the available product record\u003c\/dd\u003e\n  \u003cdt\u003eDimensions and weight\u003c\/dt\u003e\n\u003cdd\u003eNot specified in the available product record\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eRefer to the seller's current warranty terms\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 60°C\/140°F outboard thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA housing gasket or other installation hardware is not listed as included. Check the existing gasket and replace it if required by the engine service procedure.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery or follow the isolation procedure specified in the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eLocate the thermostat housing and remove the cover using the correct tools.\u003c\/li\u003e\n  \u003cli\u003eNote the original thermostat orientation before removal.\u003c\/li\u003e\n  \u003cli\u003eClean the housing and cover sealing surfaces without damaging them.\u003c\/li\u003e\n  \u003cli\u003eInstall the new thermostat in the same orientation as the original part.\u003c\/li\u003e\n  \u003cli\u003eInstall a suitable new gasket or seal if required by the engine manufacturer.\u003c\/li\u003e\n  \u003cli\u003eReassemble the housing and tighten fasteners to the service-manual torque specification.\u003c\/li\u003e\n  \u003cli\u003eRestore the cooling system as required for the specific engine and check for leaks.\u003c\/li\u003e\n  \u003cli\u003eRun the engine according to the service procedure and verify normal water flow and temperature behavior.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eInstallation requirements differ between engine models. Use the applicable factory or qualified service manual for torque values, sealing requirements and cooling-system procedures.\u003c\/p\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does the 60°C\/140°F rating mean?\u003c\/summary\u003e\u003cp\u003eIt is the specified opening temperature of the thermostat. The thermostat begins opening at approximately 60°C (140°F) to regulate coolant flow through the engine's cooling system.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I know whether this thermostat fits my engine?\u003c\/summary\u003e\u003cp\u003eMatch your complete engine brand, model designation, horsepower, stroke, year and any required serial-number range with the compatibility information and the original thermostat reference. Do not rely on horsepower alone.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat symptoms can indicate a thermostat problem?\u003c\/summary\u003e\u003cp\u003eA thermostat that is stuck closed may contribute to overheating, while one that is stuck open may prevent the engine from reaching its normal operating temperature. Cooling-system blockages, water-pump problems and sensors can cause similar symptoms, so diagnose the complete system.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement. The manufacturer reference numbers in this listing are provided for application identification and cross-reference purposes.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs a gasket included?\u003c\/summary\u003e\u003cp\u003eThe available product record lists one thermostat and does not list a gasket as an included component. Check the gasket requirement for your exact engine and replace it when required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use the thermostat without checking the engine model?\u003c\/summary\u003e\u003cp\u003eNo. The 60°C\/140°F rating alone does not establish fitment. Confirm the complete engine application and compare the original part before installation.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWork only on a cool engine and follow the applicable service-manual safety procedures.\u003c\/li\u003e\n  \u003cli\u003eVerify the engine model, year, stroke, configuration and serial-number requirements before ordering.\u003c\/li\u003e\n  \u003cli\u003eDo not install a thermostat with a different temperature rating unless the engine manufacturer specifies it.\u003c\/li\u003e\n  \u003cli\u003eInspect the cooling system for debris, corrosion, restricted passages and water-pump problems if overheating persists.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the required service procedure is unfamiliar.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine replacement parts for routine service and repair applications.\u003c\/li\u003e\n  \u003cli\u003eProduct information is presented with manufacturer references and application details to support fitment checking.\u003c\/li\u003e\n  \u003cli\u003eFor the best result, compare the original component and consult the applicable engine service documentation before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723982213435,"sku":"20TH002","price":34.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Outboard_Thermostat_for_Suzuki_4_Stroke_4-6_Cyl_70-300_HP_Outboard_Motors__________17670-90J00_-_JLM_MARINE-8286867.jpg?v=1763039303"}],"url":"https:\/\/seasierra.com\/collections\/mercury-70-300hp-4-stroke-outboard-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}