{"title":"Mercury 4-Stroke 70-90HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px;border:1px solid #e5e7eb;border-radius:8px;\"\u003e\n  \u003cp\u003eFor Mercury 4-Stroke 70–90HP outboard engines, this page helps you find compatible parts and practical service information. Below you’ll find maintenance tips, frequently replaced components, and troubleshooting guidance. You can also browse the main Mercury collection. Scroll down to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow results 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;background:#0b5cab;color:#fff;text-decoration:none;border-radius:6px;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 70–90HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial number\/nameplate on the starboard transom bracket or swivel bracket. Record the full serial range including any prefix\/suffix.\u003c\/li\u003e\n    \u003cli\u003eModel codes often include features: E (electric start), L\/XL (shaft length), P\/T (power trim\/tilt). Mercury uses serial numbers—not model years—to confirm parts.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke identification: cowling may note “FourStroke” or “EFI.” Carbureted versions lack fuel rails\/injectors; EFI models have an electronic throttle body and fuel rail.\u003c\/li\u003e\n    \u003cli\u003eIf repowering or swapping cowlings, always verify by serial number before ordering; many 75\/90 FourStroke components interchange, but some parts are serial‑specific.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑4 Carbureted FourStroke (approx. mid‑1990s–mid‑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;\"\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:6px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInline‑4, carbureted 4‑stroke outboards in the 70–90HP class\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e75\/90 FourStroke (e.g., 90 ELPT FourStroke, carb models)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eProven reliability and smooth operation; straightforward maintenance\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eMany cooling system and gearcase parts overlap with 75\/90 families; ignition\/fuel parts vary by serial number and carb configuration\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eInline‑4 EFI FourStroke (approx. early‑2000s and later)\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;\"\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:6px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInline‑4, EFI 4‑stroke outboards in the 70–90HP class\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e75\/90 EFI FourStroke (e.g., 90 ELPT EFI FourStroke)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eImproved cold start, cleaner emissions, and better fuel economy vs. carbureted versions\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSensors and fuel components are EFI‑specific; water pump and many anodes\/gearcase items often shared across 75\/90 FourStroke models\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;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical recreational use. Always follow your engine’s official service manual for exact procedures and schedules.\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;\"\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:6px 0;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWarm engine, drain oil, replace filter and crush washer if equipped\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 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:6px 0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect for water intrusion\/metal; replace drain seals each service\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck gap and replace fouled\/worn plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 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:6px 0;\"\u003eFuel filter \/ water‑separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace more often with stale or contaminated fuel\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 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:6px 0;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e200 hours or every 2–3 seasons\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace sooner if weak tell‑tale or overheat alarm occurs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 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:6px 0;\"\u003eAnodes (corrosion protection)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 50 hours \/ seasonally\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace when 50% consumed; match alloy to water type (zinc\/aluminum\/magnesium)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eThermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace if running cold or frequent overheat alarms\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 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    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px;color:#555;margin-top:8px;\"\u003e*Intervals are typical for recreational use. Severe duty, commercial, or high‑hours use may require shorter intervals.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\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\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\u003eGearcase \u0026amp; 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\u003ePropellers \u0026amp; Hubs: \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;\"\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;\"\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:6px 0;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect intake screens for blockage, verify impeller condition, check thermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWater pump kit, thermostat, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePrime fuel system, confirm fresh fuel, inspect plugs and idle air passages (EFI: sensor connections)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filter, spark plugs, electrical connectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck prop damage\/pitch, fuel restriction, and compression; EFI: verify no stored faults\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePropeller, fuel filter, plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eDrain and inspect oil; check prop shaft for fishing line; test for water intrusion\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eLower unit seal kit, bearings, propeller hub\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eBattery not charging \/ warning lamp\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eTest battery and connections; inspect rectifier\/regulator and grounds\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRectifier\/regulator, wiring, battery terminals\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;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome cooling and gearcase parts may interchange across 75\/90 FourStroke models, but ignition, fuel, and sensors often change by serial range and by carb vs. EFI. 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\u003eFor typical recreational use, replace the impeller every 2–3 seasons or 200 hours. Sand, silt, or weak tell‑tale flow are reasons to service sooner.\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 the lower unit gear oil every 100 hours or annually. Inspect for milky oil (water intrusion) or metal, and replace drain screw seals each service.\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\u003ePlease provide the full engine serial number, model features (e.g., ELPT, shaft length), carb vs. EFI, and a clear photo of the nameplate. Photos of the part being replaced also help ensure correct fitment.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px;border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year and model? Browse our main Mercury catalog and use the filters to narrow your search.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;margin-top:6px;padding:10px 16px;background:#0b5cab;color:#fff;text-decoration:none;border-radius:6px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"font-size:12px;color:#555;margin-top:6px;\"\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-mercury-mariner-40-300-hp-alpha-one-gen-ii-replaces-47-43026q06-8m0100526","title":"4-Stroke Water Pump Service Kit for Honda BF75\/BF90 AT and Early Mercury Gear Cases","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:520px; }\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  details summary { cursor:pointer; font-weight:bold; padding:8px 0; }\n  details p { padding-left:15px; }\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 aftermarket \u003cstrong\u003e4-stroke water pump service kit\u003c\/strong\u003e is intended for selected Honda Marine outboards and early Mercury gear-case applications. The company fitment information identifies Honda \u003cstrong\u003eBF75AT\u003c\/strong\u003e and \u003cstrong\u003eBF90AT\u003c\/strong\u003e models, plus an \u003cstrong\u003eearly Mercury gear case\u003c\/strong\u003e application.\u003c\/p\u003e\n\u003cp\u003eUse the original component, engine model, and service-manual information to verify the application before ordering. Compatibility depends on the exact model and gear-case configuration; the fitment information does not establish compatibility with every Mercury or Mariner outboard, every horsepower range, or MerCruiser Alpha One sterndrive.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for water pump service on selected 4-stroke outboard applications.\u003c\/li\u003e\n  \u003cli\u003eSuitable for the Honda BF75\/90 AT application identified by the company catalog.\u003c\/li\u003e\n  \u003cli\u003eAlso listed for an early Mercury gear-case application.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement service component; not an OEM-branded Honda or Mercury part.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Reference\u003c\/h2\u003e\n\u003cp\u003eThe following manufacturer reference is listed for this product. Part-number reference alone does not replace model and configuration verification.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Reference\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eHonda Marine\u003c\/td\u003e\n\u003ctd\u003e06193-ZW1-305\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm the complete model designation and gear-case configuration 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\n      \u003ctr\u003e\n\u003cth\u003eBrand or application\u003c\/th\u003e\n\u003cth\u003eModel or configuration\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eFitment note\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHonda Marine Outboard\u003c\/td\u003e\n\u003ctd\u003eBF75AT\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eCompany-listed application\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHonda Marine Outboard\u003c\/td\u003e\n\u003ctd\u003eBF90AT\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eCompany-listed application\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eEarly Mercury gear case\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eVerify the exact gear-case configuration before purchase\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\u003e4-stroke water pump service kit\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eHonda BF75\/90 AT and early Mercury gear-case applications as listed\u003c\/dd\u003e\n  \u003cdt\u003eManufacturer Reference\u003c\/dt\u003e\n  \u003cdd\u003e06193-ZW1-305\u003c\/dd\u003e\n  \u003cdt\u003eProduct Construction\u003c\/dt\u003e\n  \u003cdd\u003eKit contents and individual component materials may vary by application; verify the supplied parts against the original service assembly before installation.\u003c\/dd\u003e\n  \u003cdt\u003eBrand Status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cp\u003eThis listing is for a water pump service kit. The company catalog does not provide a verified itemized component list or confirm whether a housing is included for every catalog variation. Compare the supplied components with the original assembly and the applicable service manual before beginning work.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eSwitch off the engine, remove the ignition key, disconnect the battery where applicable, and allow the engine to cool.\u003c\/li\u003e\n  \u003cli\u003eConfirm the engine model, gear-case configuration, and replacement reference before disassembly.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the applicable manufacturer service procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump cover and existing service components, keeping track of the original arrangement.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and remove old gasket material without damaging the sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003eInstall the service-kit components in the configuration specified by the service manual.\u003c\/li\u003e\n  \u003cli\u003eReassemble the water pump and lower unit, tightening fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n  \u003cli\u003eReconnect the water tube and shift mechanism as applicable, then verify correct alignment.\u003c\/li\u003e\n  \u003cli\u003eTest the engine using an appropriate water supply and check for proper cooling-water discharge and leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eMaintenance and Troubleshooting\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I verify that this kit fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eCheck the full model designation, stroke, gear-case configuration, and the reference number 06193-ZW1-305 against your service manual or parts diagram. The listed applications are Honda BF75AT, Honda BF90AT, and an early Mercury gear case; do not assume that other horsepower ratings or later gear cases use the same kit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a worn water pump service assembly?\u003c\/summary\u003e\n  \u003cp\u003ePossible signs include weak cooling-water discharge, overheating, temperature alarms, or visible wear, cracking, deformation, or damage during inspection. Stop operation if the engine overheats and diagnose the cooling system before continued use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the water pump be serviced?\u003c\/summary\u003e\n  \u003cp\u003eFollow the maintenance schedule for your specific engine and inspect the water pump whenever cooling performance changes or the lower unit is serviced. Saltwater, sand, silty water, and extended storage can increase service needs.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need special tools?\u003c\/summary\u003e\n  \u003cp\u003eBasic hand tools and the tools specified by the applicable service manual are required. A torque wrench is recommended for reassembly. Use the manufacturer’s procedure for lower-unit removal, shift-shaft alignment, and fastener tightening.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eNo. This is an aftermarket replacement service kit. Honda and Mercury names and part numbers are used only to identify the intended application and reference numbers.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety and Fitment Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model, model year where applicable, gear-case configuration, and reference number before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not install the kit if the supplied components differ from the original assembly or the service-manual illustration.\u003c\/li\u003e\n  \u003cli\u003eNever operate an outboard without an adequate water supply.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump service is outside your experience.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement and is not manufactured or branded by Honda Marine or Mercury Marine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973693755,"sku":"20KM003-H","price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_with_Housing_for_Mercury_40-300_HP_47-43026Q06_-_JLM_MARINE-8289928.jpg?v=1763038915"},{"product_id":"water-pump-impeller-kit-fits-honda-mercury-johnson-evinrude-70-235-hp-replaces-47-43026q02-19210-zw1-003-399289","title":"Water Pump Impeller with Key – Fits Select Honda 70–90 HP and Mercury\/Mariner 2-Stroke 60–225 HP","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 { 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 \u003cstrong\u003ewater pump impeller with key\u003c\/strong\u003e is an aftermarket replacement for selected Honda Marine and Mercury\/Mariner outboard water pump applications. The product is supplied as one impeller with a key and is designed to restore water-pump circulation when the original impeller is worn, cracked, hardened, or damaged.\u003c\/p\u003e\n  \u003cp\u003eCompany fitment information identifies applications including select Honda outboards rated at 70–90 HP, Mercury\/Mariner 2-stroke outboards rated at 60–225 HP, and selected Mercury\/Mariner 4-stroke applications ranging from 30 to 300 HP. Exact model, stroke type, gearcase configuration, and serial-number conditions vary by application, so compare your original impeller and engine parts information before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Water pump impeller with key\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct replacement in the matching factory water pump housing\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Flexible marine-grade impeller rubber; compound details are not specified by the product record\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIncluded key:\u003c\/strong\u003e One matching key is included with the impeller\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand status:\u003c\/strong\u003e Aftermarket replacement, not an original equipment component\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eReference Part Numbers\u003c\/h2\u003e\n  \u003cp\u003eThe following manufacturer and aftermarket references are associated with this impeller application. They are provided for identification and cross-reference purposes only; confirm the complete engine application before purchase.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Reference Part Numbers\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003e19210-ZW1-003; 19210-ZW1-303\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e47-43026T2; 47-430262Q02\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3056; 18-3056-10\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45037\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e399289; 391538\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n  \u003cp\u003eUse the following information as an application guide, not as a substitute for checking the engine model and serial number.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility Guide\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eRated horsepower\u003c\/th\u003e\n\u003cth\u003eApplication information\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eHonda Marine\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e70–90 HP\u003c\/td\u003e\n\u003ctd\u003eSelect Honda outboard applications listed by the company\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e60–225 HP\u003c\/td\u003e\n\u003ctd\u003eSelected 2-stroke applications; exact model and serial conditions must be confirmed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e30–300 HP\u003c\/td\u003e\n\u003ctd\u003eSelected applications including 30, 40, 45, 50, 60, 80, 100, 115, 135, 150, 175, 200, 225, 250, 275, and 300 HP families\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eJohnson\/Evinrude reference numbers are listed above for identification, but a specific Johnson or Evinrude engine fitment is not stated in the available company record. Do not rely on the reference number alone to confirm compatibility.\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\u003eWater pump impeller with key\u003c\/dd\u003e\n    \u003cdt\u003eQuantity\u003c\/dt\u003e\n\u003cdd\u003eOne impeller with one key\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eOutboard water pump cooling systems\u003c\/dd\u003e\n    \u003cdt\u003eConstruction\u003c\/dt\u003e\n\u003cdd\u003eFlexible marine impeller rubber\u003c\/dd\u003e\n    \u003cdt\u003eInstallation position\u003c\/dt\u003e\n\u003cdd\u003eMatching water pump housing on the outboard gearcase\u003c\/dd\u003e\n    \u003cdt\u003ePart status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement\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 Water pump impeller\u003c\/li\u003e\n    \u003cli\u003e1 x Matching impeller key\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eWater pump cover gaskets, wear plates, seals, bolts, and other pump-service components are not included unless separately stated for your order.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and follow the outboard manufacturer's safety procedures before servicing the lower unit.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit and access the water pump assembly according to the service manual for your exact engine.\u003c\/li\u003e\n    \u003cli\u003eRemove the pump cover, old impeller, and old key. Note the original impeller orientation before removal.\u003c\/li\u003e\n    \u003cli\u003eClean the pump housing, keyway, and mating surfaces. Inspect the housing, wear plate, seals, and gaskets for wear or damage.\u003c\/li\u003e\n    \u003cli\u003eInstall the supplied key and slide the new impeller into position. Use only a lubricant approved for the impeller material and the engine manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eReinstall the pump cover and any required gaskets or seals. Do not reuse damaged sealing components.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, reconnect the battery, and test the cooling-water tell-tale flow before normal operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eBecause water-pump layouts and shaft-rotation procedures vary between engine families, follow the service manual for your exact model rather than relying on a general installation sequence.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should an impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eReplace an impeller when it is cracked, brittle, deformed, damaged, or no longer producing the expected cooling-water flow. A weak tell-tale stream or an overheating warning can indicate a cooling-system problem, but other components should also be inspected.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this product include the key?\u003c\/summary\u003e\n    \u003cp\u003eYes. The company product description identifies this item as a water pump impeller with key, and the supplied contents are one impeller and one matching key.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this include a complete water pump repair kit?\u003c\/summary\u003e\n    \u003cp\u003eNo. This listing is for a single impeller supplied with its key. A gasket, wear plate, seal, pump cover, and other water-pump components are not included unless separately specified.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eMatch the engine manufacturer, horsepower, stroke type, exact model, gearcase configuration, and serial-number range where applicable. Also compare the original impeller, keyway, and pump housing before installation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement. The manufacturer and aftermarket reference numbers shown on this page are cross-reference identifiers and do not mean that the replacement is manufactured by the original engine manufacturer.\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\u003eVerify the complete application against your engine and original part before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not use a horsepower-only match as final confirmation; stroke type, model, gearcase, and serial conditions may affect fitment.\u003c\/li\u003e\n    \u003cli\u003eStop operation immediately if the engine overheats or the tell-tale flow is weak after installation.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump servicing is unfamiliar.\u003c\/li\u003e\n    \u003cli\u003eManufacturer names and part numbers are used only for identification and compatibility reference.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine replacement parts\u003c\/strong\u003e — Practical aftermarket components for routine outboard maintenance and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-focused listings\u003c\/strong\u003e — Reference numbers and fitment guidance are provided to help you compare the correct part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupport for installation planning\u003c\/strong\u003e — Always use the service information for your exact engine when completing water-pump work.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723982344507,"sku":"17IH009-K","price":20.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Honda_30-250_HP___18-3056_-_JLM_MARINE-8288262.jpg?v=1763039311"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-70-90hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}