{"title":"Mercury 2-Stroke 115-140HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px;border:1px solid #e5e7eb;border-radius:8px;\"\u003e\n  \u003cp\u003eParts and service guidance for Mercury 2‑Stroke 115–140HP outboard engines. Use this page to find compatible replacement parts, routine maintenance tips, and troubleshooting help. You can also browse the main Mercury collection. Scroll to the bottom of the 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;margin-top:8px;padding:10px 14px;background:#111827;color:#ffffff;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 115–140HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/nameplate on the starboard swivel bracket or transom clamp. Record the full serial and any model code (e.g., 115ELPT).\u003c\/li\u003e\n    \u003cli\u003eModel code tips: E = electric start, L\/XL = shaft length, PT = power trim. Suffixes can indicate controls and year-run variations.\u003c\/li\u003e\n    \u003cli\u003eConfirm platform: many 115–140HP 2‑Strokes are inline‑4 carbureted; later 115s may be 3‑cyl DFI (Optimax). Count cylinders and note any “Optimax\/DFI” cowl decals.\u003c\/li\u003e\n    \u003cli\u003eVerify shaft length (20\/25 in) and gearcase style before ordering lower unit or propeller parts.\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 2‑Stroke (common 115\/125\/140 families)\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 #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑4, carbureted 2‑Stroke mid‑range outboards.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e115 2‑Stroke (ELPT variants), 125, and select 140 models depending on market\/year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eLight weight, strong mid‑range torque, simple carburetion for straightforward service.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eIgnition, carb jetting, and gearcase ratios vary by serial; verify before ordering. Water pump and many gearcase seals are shared across mid‑range platforms.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e3‑Cylinder DFI (Optimax) 115\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 #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑3, direct fuel injection (DFI) 2‑Stroke.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e115 Optimax\/DFI variants (L\/XL shaft, PT\/remote).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eImproved fuel economy and emissions vs. carbs; strong low‑end response.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eElectrical, fuel, and sensor parts differ from carbureted engines. Use serial to confirm stator, regulator\/rectifier, and injector components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eOlder Inline‑6 2‑Stroke (select 115\/140 legacy models)\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 #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑6, carbureted 2‑Stroke legacy platform.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eSelected 115\/140 “classic” models (varies by year\/region).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSmooth running, distinctive top‑end power.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eMany powerhead and ignition parts are unique. Cooling and gearcase service items remain routine but may use different kits—confirm by serial.\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 2‑Stroke outboards; always follow your engine’s official service manual and adjust for heavy use or harsh 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 #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect for water intrusion (milky oil). Service seals if contamination is found.\u003c\/td\u003e\n        \u003ctd\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\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eGap\/index per manual. Replace sooner if fouling or misfire occurs.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plug\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eFuel filter \/ inline filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hrs or 1 season\u003c\/td\u003e\n        \u003ctd\u003eReplace if fuel quality is suspect or after storage. Helps protect carbs\/DFI.\u003c\/td\u003e\n        \u003ctd\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\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2 seasons (or 200 hrs)\u003c\/td\u003e\n        \u003ctd\u003eService more often in sandy\/silty water or when tell‑tale is weak.\u003c\/td\u003e\n        \u003ctd\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\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd\u003eInspect 50–100 hrs; replace at ~50% wear\u003c\/td\u003e\n        \u003ctd\u003eUse the correct alloy for fresh, brackish, or salt water to prevent corrosion.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat\u003c\/td\u003e\n        \u003ctd\u003eEvery 2 years\u003c\/td\u003e\n        \u003ctd\u003eReplace if engine runs too cool\/hot or shows poor warm‑up.\u003c\/td\u003e\n        \u003ctd\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\u003eOil injection \/ premix check\u003c\/td\u003e\n        \u003ctd\u003eAnnually\u003c\/td\u003e\n        \u003ctd\u003eInspect pump, lines, and strainer; bleed after service. Premix models typically use 50:1 TC‑W3—confirm for your serial.\u003c\/td\u003e\n        \u003ctd\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\u003eLower unit seals\u003c\/td\u003e\n        \u003ctd\u003eInspect at gear oil service\u003c\/td\u003e\n        \u003ctd\u003eReplace if water is present or seals are damaged (fishing line at prop).\u003c\/td\u003e\n        \u003ctd\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\u003ePropeller \u0026amp; hardware check\u003c\/td\u003e\n        \u003ctd\u003eEvery trip \/ 50 hrs\u003c\/td\u003e\n        \u003ctd\u003eRemove line on shaft; inspect hub and cotter. Pitch\/condition affects RPM and holeshot.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\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;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service Kits — \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;\"\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 #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #e5e7eb;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWeak tell‑tale \/ overheat alarm\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens, tell‑tale hose, thermostat, and impeller condition.\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, thermostat, intake screen, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd\u003eVerify prop condition and pitch, fuel quality, clogged filter, carb jets\/injectors, and spark.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, fuel filter, carburetor rebuild kit or injector service parts, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eCheck choke\/enrichment, primer bulb and lines for air leaks, plug gap, and idle sync.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel lines\/primer bulb, carb kit, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd\u003eConfirm oil ratio or oil pump calibration; thermostat stuck open can cause rich running.\u003c\/td\u003e\n        \u003ctd\u003eThermostat, oil pump\/lines, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eCheck oil level\/condition; inspect prop shaft seals for fishing line damage.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, bearings, gears\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\u003eMany wear items (impellers, anodes, some gearcase seals) cross over, but ignition, fuel, and powerhead components often change by platform and serial range. Always confirm with the model\/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 seasons or 200 hours, and immediately if the tell‑tale weakens, the engine overheats, or after ingesting sand\/silt. Heavy use or shallow operation may require more frequent service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually, and anytime oil appears milky or contaminated. Servicing before off‑season storage helps catch water intrusion early.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full serial, model code, shaft length (L\/XL), control type, cylinder count (3\/4\/6), and whether it is carbureted or Optimax\/DFI. Photos of the nameplate and the part location are helpful.\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 collection for compatible components across platforms.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;margin-top:8px;padding:10px 14px;background:#0b5; color:#ffffff;text-decoration:none;border-radius:6px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#6b7280;\"\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-fits-tohatsu-nissan-mercury-40-90hp-2-stroke-replaces-3b7-65021-2","title":"Water Pump Impeller for Nissan\/Tohatsu 2-Stroke 60–140 HP – Replaces 3C7-65021-1 and 3B7-65022-0","description":"\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\u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller\u003c\/strong\u003e is designed for selected Nissan and Tohatsu marine outboards. It is a replacement cooling-system component for the applications listed below, including selected 2-stroke 60–140 HP engines and Nissan 70\/90 TLDI and 120A\/140A models.\u003c\/p\u003e\n    \u003cp\u003eThe impeller is sold as a \u003cstrong\u003esingle replacement component\u003c\/strong\u003e. It is listed as an aftermarket replacement for \u003cstrong\u003eSierra Marine 18-8924\u003c\/strong\u003e and is cross-referenced with the manufacturer part numbers shown in the matrix below.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Water pump impeller for an outboard cooling system.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Selected Nissan and Tohatsu marine outboards.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eEngine range:\u003c\/strong\u003e Listed applications include 2-stroke 60\/70\/90 HP and 2-stroke 115\/120\/140 HP models.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFitment requirement:\u003c\/strong\u003e Confirm the complete engine model and original part number before ordering.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n    \u003cp\u003eUse these manufacturer and aftermarket references to compare the replacement impeller with your existing part. A part-number match should still be checked against the engine model.\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\u003eReference 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\u003eTohatsu\/Nissan manufacturer reference\u003c\/td\u003e\n            \u003ctd\u003e3C7-65021-1\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTohatsu\/Nissan manufacturer reference\u003c\/td\u003e\n            \u003ctd\u003e3C7650211M\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTohatsu\/Nissan manufacturer reference\u003c\/td\u003e\n            \u003ctd\u003e3B7-65022-0\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTohatsu\/Nissan manufacturer reference\u003c\/td\u003e\n            \u003ctd\u003e3B7650220M\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eAftermarket reference\u003c\/td\u003e\n            \u003ctd\u003eSierra Marine 18-8924\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\u003eThe company fitment information identifies the following Nissan and Tohatsu applications. Engine model, year, and serial-number coverage can vary, so verify all identifying details before installation.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n            \u003cthead\u003e\n                \u003ctr\u003e\n                    \u003cth\u003eBrand\u003c\/th\u003e\n                    \u003cth\u003eModel or Application\u003c\/th\u003e\n                    \u003cth\u003eRated HP\u003c\/th\u003e\n                    \u003cth\u003eStroke\u003c\/th\u003e\n                    \u003cth\u003eReference\u003c\/th\u003e\n                    \u003cth\u003eFitment Notes\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e60 HP applications\u003c\/td\u003e\n                    \u003ctd\u003e60 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eConfirm the exact engine model and original impeller number.\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e70 HP applications\u003c\/td\u003e\n                    \u003ctd\u003e70 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eConfirm the exact engine model and original impeller number.\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e90 HP applications\u003c\/td\u003e\n                    \u003ctd\u003e90 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eIncludes selected Nissan\/Tohatsu 90 TLDI applications; verify model details.\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e115 HP applications\u003c\/td\u003e\n                    \u003ctd\u003e115 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eConfirm the exact engine model and original impeller number.\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e120A applications\u003c\/td\u003e\n                    \u003ctd\u003e120 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eListed by the company as a Nissan application; verify the complete model designation.\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eNissan\/Tohatsu\u003c\/td\u003e\n                    \u003ctd\u003e140A applications\u003c\/td\u003e\n                    \u003ctd\u003e140 HP\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e3C7-65021-1 \/ 3B7-65022-0\u003c\/td\u003e\n                    \u003ctd\u003eListed by the company as a Nissan application; verify the complete model designation.\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\u003eWater pump impeller\u003c\/dd\u003e\n        \u003cdt\u003eApplication\u003c\/dt\u003e\n        \u003cdd\u003eSelected Nissan and Tohatsu marine outboards\u003c\/dd\u003e\n        \u003cdt\u003eStroke Applications\u003c\/dt\u003e\n        \u003cdd\u003e2-stroke applications listed by the company\u003c\/dd\u003e\n        \u003cdt\u003eHorsepower Range\u003c\/dt\u003e\n        \u003cdd\u003e60–140 HP, subject to the specific model and application\u003c\/dd\u003e\n        \u003cdt\u003eAftermarket Reference\u003c\/dt\u003e\n        \u003cdd\u003eSierra Marine 18-8924\u003c\/dd\u003e\n        \u003cdt\u003eManufacturer References\u003c\/dt\u003e\n        \u003cdd\u003e3C7-65021-1, 3C7650211M, 3B7-65022-0, 3B7650220M\u003c\/dd\u003e\n    \u003c\/dl\u003e\n\n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e1 × Water pump impeller\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003eDisconnect the battery and follow the engine manufacturer’s safety procedures before beginning work.\u003c\/li\u003e\n        \u003cli\u003eRemove the lower unit or gearcase according to the service manual for your specific engine.\u003c\/li\u003e\n        \u003cli\u003eRemove the water pump housing and take out the old impeller.\u003c\/li\u003e\n        \u003cli\u003eInspect the pump housing, wear plate, seals, and related components for wear or damage.\u003c\/li\u003e\n        \u003cli\u003eClean the pump housing and mating surfaces before installing the replacement impeller.\u003c\/li\u003e\n        \u003cli\u003eInstall the impeller in the correct orientation for the engine’s normal rotation.\u003c\/li\u003e\n        \u003cli\u003eReassemble the water pump and lower unit using the service manual’s gasket, seal, and torque procedures.\u003c\/li\u003e\n        \u003cli\u003eRestore the shift linkage and battery connections, then run the engine with an appropriate water supply.\u003c\/li\u003e\n        \u003cli\u003eConfirm that cooling-water circulation and the telltale stream are functioning normally before use.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow do I know if this impeller fits my engine?\u003c\/summary\u003e\n        \u003cp\u003eCompare your complete engine model and original impeller number with the Engine \u0026amp; Model Compatibility and Part Number Matrix sections. This listing is intended for selected Nissan and Tohatsu applications, including the 2-stroke 60\/70\/90 HP and 115\/120\/140 HP applications identified above.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs of a worn water pump impeller?\u003c\/summary\u003e\n        \u003cp\u003eTypical warning signs can include overheating, a weak or missing telltale stream, or reduced cooling-water circulation. Inspect the impeller and the complete water pump assembly if any of these symptoms occur.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eDoes this listing include a complete water pump kit?\u003c\/summary\u003e\n        \u003cp\u003eNo. This listing is for one water pump impeller only. Gaskets, keys, wear plates, housings, and other water-pump components are not included unless specifically stated.\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 impeller. The listed manufacturer and aftermarket numbers are provided for compatibility cross-reference only.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eShould I verify the part before installation?\u003c\/summary\u003e\n        \u003cp\u003eYes. Compare the replacement with the original part and verify the engine model, horsepower, stroke, and applicable part number before installation. Do not install the impeller if the dimensions, hub, or other identifying features do not match.\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003eVerify the complete engine model and original part number before ordering.\u003c\/li\u003e\n        \u003cli\u003eFitment references are application-specific and should not be extended to unlisted engine models.\u003c\/li\u003e\n        \u003cli\u003eThis is an aftermarket replacement component, not an original equipment manufacturer part.\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    \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 — We supply replacement components for routine marine maintenance and repair.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Fitment\u003c\/strong\u003e — Product references are provided to help customers compare engine models and original part numbers.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePractical Value\u003c\/strong\u003e — Aftermarket replacement parts offer a practical option for maintaining compatible marine engines.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718264394043,"sku":"17IT005","price":17.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Tohatsu_-_Mercury_3B7-65021-2_3B7650210M_3B7650212M_3C7-65021-1_-_JLM_MARINE-8289714.jpg?v=1762958470"}],"url":"https:\/\/seasierra.com\/collections\/mercury-2-stroke-115-140hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}