{"product_id":"45-65021-0-water-pump-impeller-tohatsu-nissan-25-40hp","title":"345-65021-0 Water Pump Impeller for Tohatsu Nissan 25-40 HP Outboards | Quickmarine","description":"\u003cbody\u003e\n\n\n  \u003cmeta charset=\"utf-8\"\u003e\n  \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1\"\u003e\n  \u003ctitle\u003e345-65021-0 Water Pump Impeller for Tohatsu Nissan 25-40 HP | Quickmarine\u003c\/title\u003e\n  \u003cmeta name=\"description\" content=\"Aftermarket 345-65021-0 water pump impeller for selected Tohatsu and Nissan 25-40 HP outboards. Cross references include 345650210M, 3R0650210M, 47-16154-1 and Sierra 18-8923.\"\u003e\n  \u003cstyle\u003e\n    :root {\n      --nbm-navy: #123044;\n      --nbm-blue: #1f6f9f;\n      --nbm-sky: #eaf5fb;\n      --nbm-border: #d7e3ea;\n      --nbm-text: #20313c;\n      --nbm-muted: #5f7180;\n      --nbm-white: #ffffff;\n      --nbm-warn: #fff7e6;\n      --nbm-warn-border: #f2cf8a;\n    }\n    * { box-sizing: border-box; }\n    body {\n      margin: 0;\n      font-family: Arial, Helvetica, sans-serif;\n      color: var(--nbm-text);\n      background: #f6f9fb;\n      line-height: 1.65;\n    }\n    main.nbm-product-page {\n      max-width: 1120px;\n      margin: 0 auto;\n      padding: 24px;\n    }\n    .nbm-card {\n      background: var(--nbm-white);\n      border: 1px solid var(--nbm-border);\n      border-radius: 18px;\n      padding: 28px;\n      margin: 18px 0;\n      box-shadow: 0 8px 22px rgba(18, 48, 68, 0.06);\n    }\n    .nbm-hero {\n      background: linear-gradient(135deg, var(--nbm-navy), var(--nbm-blue));\n      color: var(--nbm-white);\n      border-radius: 22px;\n      padding: 34px;\n      margin-bottom: 20px;\n    }\n    .nbm-eyebrow {\n      text-transform: uppercase;\n      letter-spacing: 0.08em;\n      font-size: 13px;\n      font-weight: 700;\n      opacity: 0.9;\n      margin-bottom: 10px;\n    }\n    .nbm-visual-title {\n      font-size: clamp(28px, 4vw, 46px);\n      line-height: 1.15;\n      font-weight: 800;\n      margin: 0 0 14px;\n    }\n    .nbm-hero p { max-width: 880px; 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border-radius: 16px; }\n      .nbm-grid { grid-template-columns: 1fr; }\n      table { min-width: 680px; }\n    }\n  \u003c\/style\u003e\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"Product\",\n    \"name\": \"345-65021-0 Water Pump Impeller for Tohatsu and Nissan 25-40 HP Outboards\",\n    \"description\": \"Aftermarket replacement water pump impeller for selected Tohatsu and Nissan outboard motors using the 345-65021-0 impeller family.\",\n    \"brand\": {\"@type\": \"Brand\", \"name\": \"Quickmarine\"},\n    \"mpn\": \"345-65021-0\",\n    \"category\": \"Marine outboard water pump impeller\",\n    \"additionalProperty\": [\n      {\"@type\": \"PropertyValue\", \"name\": \"Cross Reference\", \"value\": \"345650210, 345650210M, 3R0650210M, 47-16154-1, Sierra 18-8923\"},\n      {\"@type\": \"PropertyValue\", \"name\": \"Blade Count\", \"value\": \"6\"},\n      {\"@type\": \"PropertyValue\", \"name\": \"Outside Diameter\", \"value\": \"Approx. 44.1 mm\"},\n      {\"@type\": \"PropertyValue\", \"name\": \"Depth\", \"value\": \"Approx. 20.3 mm\"},\n      {\"@type\": \"PropertyValue\", \"name\": \"Shaft Diameter\", \"value\": \"Approx. 17.1-17.3 mm\"}\n    ]\n  }\n  \u003c\/script\u003e\n\n\n\u003cmain class=\"nbm-product-page\"\u003e\n  \u003csection class=\"nbm-hero\" aria-label=\"Product overview\"\u003e\n    \u003cdiv class=\"nbm-eyebrow\"\u003eQuickmarine aftermarket marine cooling part\u003c\/div\u003e\n    \u003cdiv class=\"nbm-visual-title\"\u003e345-65021-0 Water Pump Impeller for Tohatsu \u0026amp; Nissan 25-40 HP Outboards\u003c\/div\u003e\n    \u003cp\u003eThis Quickmarine water pump impeller is an aftermarket replacement part for selected Tohatsu and Nissan outboard motors that use the 345-65021-0 impeller family. It helps restore the water pump’s ability to move cooling water through the engine and is commonly cross-referenced with 345650210, 345650210M, 3R0650210M, Mercury\/Mariner 47-16154-1 and Sierra 18-8923.\u003c\/p\u003e\n    \u003cp\u003eThe package includes one outboard water pump impeller. Before ordering, compare your original impeller, OEM part number, engine model, year and official parts diagram to confirm that this is the correct replacement.\u003c\/p\u003e\n    \u003cdiv class=\"nbm-badges\" aria-label=\"Key product highlights\"\u003e\n      \u003cspan class=\"nbm-badge\"\u003eReplaces 345-65021-0\u003c\/span\u003e\n      \u003cspan class=\"nbm-badge\"\u003e6-blade impeller\u003c\/span\u003e\n      \u003cspan class=\"nbm-badge\"\u003eApprox. 44.1 mm OD\u003c\/span\u003e\n      \u003cspan class=\"nbm-badge\"\u003eFor selected 25-40 HP outboards\u003c\/span\u003e\n      \u003cspan class=\"nbm-badge\"\u003eAftermarket replacement\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003eProduct Overview\u003c\/h2\u003e\n    \u003cp\u003eThe water pump impeller is a small but critical service part inside an outboard motor’s cooling system. As the drive shaft turns, the flexible blades push cooling water through the pump housing and into the engine. A worn, cracked or hardened impeller can reduce water flow and may lead to overheating.\u003c\/p\u003e\n    \u003cp\u003eThis Quickmarine impeller is intended for selected Nissan and Tohatsu 25 HP, 30 HP, 35 HP and 40 HP outboards, including many two-stroke models and selected 25 HP and 30 HP four-stroke models. It is not an OEM original component. It is supplied as an aftermarket replacement part for engines that match the listed part-number family and dimensions.\u003c\/p\u003e\n    \u003cdiv class=\"nbm-note\"\u003e\n\u003cstrong\u003eFitment-first recommendation:\u003c\/strong\u003e Use the OEM number and original impeller dimensions as your primary confirmation method. Model names alone can be reused across years or regional configurations, so the old part and official parts diagram remain the most reliable references.\u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003eWhy Choose This Replacement Impeller\u003c\/h2\u003e\n    \u003cdiv class=\"nbm-grid\"\u003e\n      \u003cdiv class=\"nbm-mini-card\"\u003e\n\u003cstrong\u003eBuilt for cooling-system service.\u003c\/strong\u003e\u003cp\u003eThis part is designed to replace a worn water pump impeller and help restore cooling water circulation in compatible outboard motors.\u003c\/p\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"nbm-mini-card\"\u003e\n\u003cstrong\u003eClear cross-reference data.\u003c\/strong\u003e\u003cp\u003eThe page lists OEM and aftermarket cross numbers so buyers can compare old parts, service manuals and online parts diagrams before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"nbm-mini-card\"\u003e\n\u003cstrong\u003ePractical dimensions for checking.\u003c\/strong\u003e\u003cp\u003eBlade count, outside diameter, depth and shaft bore are shown in the specification table to reduce incorrect orders.\u003c\/p\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"nbm-mini-card\"\u003e\n\u003cstrong\u003eAftermarket value without OEM confusion.\u003c\/strong\u003e\u003cp\u003eThe product is presented honestly as a Quickmarine aftermarket replacement, with third-party brand names used only for compatibility identification.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003ePart Number Cross Reference\u003c\/h2\u003e\n    \u003cp\u003eThe following part numbers are provided to help identify compatible applications. They do not mean that this Quickmarine product is manufactured by, endorsed by or supplied as an OEM part from those brands.\u003c\/p\u003e\n    \u003cdiv class=\"nbm-table-wrap\"\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n\u003cth\u003eBrand \/ Reference Family\u003c\/th\u003e\n\u003cth\u003eCross Reference Number\u003c\/th\u003e\n\u003cth\u003eHow to Use It\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e345-65021-0\u003c\/td\u003e\n\u003ctd\u003ePrimary OEM-style reference number for this impeller family.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e345650210\u003c\/td\u003e\n\u003ctd\u003eCompact number format often used in parts listings.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e345650210M \/ 345-65021-0M\u003c\/td\u003e\n\u003ctd\u003eCommon marine-parts listing format; verify against the old impeller.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n\u003ctd\u003e3R0-65021-0 \/ 3R0650210 \/ 3R0650210M\u003c\/td\u003e\n\u003ctd\u003eRelated or superseded-style cross references found in parts listings.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n\u003ctd\u003e47-16154-1 \/ 47-161541\u003c\/td\u003e\n\u003ctd\u003eUse only when your Mercury\/Mariner parts diagram confirms this cross reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-8923\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross reference used in marine replacement-part catalogs.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45400\u003c\/td\u003e\n\u003ctd\u003eAdditional aftermarket cross reference; confirm dimensions before purchase.\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 class=\"nbm-card\"\u003e\n    \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n    \u003cp\u003eUse these dimensions as a comparison guide. Small variations can appear across suppliers and measurement methods, so the safest approach is to compare the specification table with your original impeller.\u003c\/p\u003e\n    \u003cdiv class=\"nbm-table-wrap\"\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003cth\u003eBuyer Check\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eOutboard water pump impeller\u003c\/td\u003e\n\u003ctd\u003eFor cooling-system water pump service.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePrimary Part Number\u003c\/td\u003e\n\u003ctd\u003e345-65021-0\u003c\/td\u003e\n\u003ctd\u003eConfirm against the parts diagram for your engine model and year.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eCommon Cross Numbers\u003c\/td\u003e\n\u003ctd\u003e345650210, 345650210M, 3R0650210M, 47-16154-1, 18-8923\u003c\/td\u003e\n\u003ctd\u003eCross numbers are for identification, not brand affiliation.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNumber of Blades\u003c\/td\u003e\n\u003ctd\u003e6 blades\u003c\/td\u003e\n\u003ctd\u003eCompare blade count with your removed impeller.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eOutside Diameter\u003c\/td\u003e\n\u003ctd\u003eApprox. 44.1 mm \/ 1.736 in\u003c\/td\u003e\n\u003ctd\u003eSome references round this to 44 mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDepth \/ Height\u003c\/td\u003e\n\u003ctd\u003eApprox. 20.3 mm \/ 0.799 in\u003c\/td\u003e\n\u003ctd\u003eSome references round this to 20 mm.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eShaft Bore Diameter\u003c\/td\u003e\n\u003ctd\u003eApprox. 17.1-17.3 mm \/ 0.67-0.681 in\u003c\/td\u003e\n\u003ctd\u003eVerify with the shaft and original hub.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eDurable rubber \/ neoprene-style impeller with nylon or high-strength plastic hub\u003c\/td\u003e\n\u003ctd\u003eDescriptions vary by source; verify if a precise material is required.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eApproximate Weight\u003c\/td\u003e\n\u003ctd\u003eAbout 10-11 g\u003c\/td\u003e\n\u003ctd\u003eWeight is for reference only and may vary by batch.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePackage Contents\u003c\/td\u003e\n\u003ctd\u003e1 × water pump impeller\u003c\/td\u003e\n\u003ctd\u003eGaskets, wear plate, lubricant and tools are not included unless separately stated on your store listing.\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 class=\"nbm-card\"\u003e\n    \u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n    \u003cp\u003eThis compatibility guide is written for engines that use the 345-65021-0 impeller family. Because outboard models can vary by year, market and production series, always verify the original part number and dimensions before installation.\u003c\/p\u003e\n    \u003ch3\u003eNissan Outboard Applications\u003c\/h3\u003e\n    \u003cdiv class=\"nbm-table-wrap\"\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel Family\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference Years \/ Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS25C2, NS25C3\u003c\/td\u003e\n\u003ctd\u003e25 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 25C-series applications; verify by parts diagram.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS30A3, NS30A4\u003c\/td\u003e\n\u003ctd\u003e30 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 30A-series applications; verify by original impeller.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS35C\u003c\/td\u003e\n\u003ctd\u003e35 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected applications using the 345-65021-0 impeller family.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS40C, NS40C2\u003c\/td\u003e\n\u003ctd\u003e40 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 40C-series applications; compare part number first.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF25A, NSF25B\u003c\/td\u003e\n\u003ctd\u003e25 HP\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected A\/B-series applications, commonly referenced for early 2000s through 2014 models.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF30A, NSF30B\u003c\/td\u003e\n\u003ctd\u003e30 HP\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected A\/B-series applications; verify by OEM number and dimensions.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eTohatsu Outboard Applications\u003c\/h3\u003e\n    \u003cdiv class=\"nbm-table-wrap\"\u003e\n      \u003ctable\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel Family\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference Years \/ Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM25C2, M25C3, M25H, MX25H, 25JET\u003c\/td\u003e\n\u003ctd\u003e25 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 25 HP applications using this impeller family.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM30A3, M30A4, M30H, MX30H\u003c\/td\u003e\n\u003ctd\u003e30 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 30 HP applications; confirm by old impeller and parts diagram.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM35, M35C\u003c\/td\u003e\n\u003ctd\u003e35 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected applications using 345-65021-0 style impeller.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM40C\u003c\/td\u003e\n\u003ctd\u003e40 HP\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 40C-series applications; verify before purchase.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS25A, MFS25B\u003c\/td\u003e\n\u003ctd\u003e25 HP\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003eCommonly referenced A\/B-series applications; verify by OEM number.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS30A, MFS30B\u003c\/td\u003e\n\u003ctd\u003e30 HP\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003eCommonly referenced A\/B-series applications; verify by OEM number.\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS25C, MFS30C\u003c\/td\u003e\n\u003ctd\u003e25-30 HP\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003eCheck carefully. Some listings include C-series models, but later Tohatsu families may use different impellers.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"nbm-warning\"\u003e\n\u003cstrong\u003eCompatibility disclaimer:\u003c\/strong\u003e A listed engine family does not guarantee fitment for every production year or regional version. Purchase only after confirming your OEM number, original impeller dimensions, engine serial\/model information and official parts diagram.\u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003eInstallation and Inspection Notes\u003c\/h2\u003e\n    \u003cp\u003eThese notes are general service guidance and do not replace the factory service manual for your engine. If you are not comfortable removing the lower unit or servicing the water pump, ask a qualified marine technician to install the impeller.\u003c\/p\u003e\n    \u003cul class=\"nbm-check-list\"\u003e\n      \u003cli\u003eNever run the outboard dry. Use a test tank or proper flushing muffs with a continuous water supply when testing on land.\u003c\/li\u003e\n      \u003cli\u003eInspect the old impeller for cracked, missing, hardened or permanently bent blades. Also check the pump cup, wear plate and gaskets.\u003c\/li\u003e\n      \u003cli\u003eLubricate the new impeller and pump cup with a suitable impeller-safe lubricant such as glycerin, silicone grease or dish soap before assembly.\u003c\/li\u003e\n      \u003cli\u003eSeat the impeller in the correct rotation direction according to your service manual, then reassemble the pump housing evenly.\u003c\/li\u003e\n      \u003cli\u003eAfter installation, start the engine only with proper water supply and confirm a steady tell-tale water stream. Stop the engine immediately if water flow is weak or overheating occurs.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003eFAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I know if this 345-65021-0 impeller fits my outboard?\u003c\/summary\u003e\n      \u003cp\u003eCheck whether your original part number matches 345-65021-0, 345650210, 345650210M or a confirmed cross reference such as 3R0650210M, 47-16154-1 or Sierra 18-8923. Then compare the original impeller’s blade count, outside diameter, depth and shaft bore with the specifications on this page.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eIs this an OEM Tohatsu or Nissan part?\u003c\/summary\u003e\n      \u003cp\u003eNo. This page describes a Quickmarine aftermarket replacement impeller. Tohatsu, Nissan, Mercury, Mariner, Sierra and Mallory names and part numbers are used only to identify compatible applications and cross references.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is included in the package?\u003c\/summary\u003e\n      \u003cp\u003eThe package contains one water pump impeller. Gaskets, wear plates, O-rings, lubricant, tools and service-manual materials are not included unless separately stated in your store’s product offer.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat are common signs of a failing impeller?\u003c\/summary\u003e\n      \u003cp\u003eCommon warning signs include weak or intermittent tell-tale water flow, unusually hot discharge water, overheating alarms, steam, reduced cooling performance or visible cracks and missing pieces on the removed impeller.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow often should an outboard water pump impeller be replaced?\u003c\/summary\u003e\n      \u003cp\u003eMany marine service schedules recommend regular inspection and replacement based on operating hours, age and water conditions. As a practical rule, inspect the impeller at annual service or around 100 hours, and replace it every 2-3 years or 200-300 hours, or sooner if water flow becomes weak or the blades show damage.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I dry-run the motor briefly after installing the impeller?\u003c\/summary\u003e\n      \u003cp\u003eNo. Dry running can overheat and damage a rubber impeller very quickly. Always supply water with a test tank or proper flushing muffs before starting the engine, and stop the engine immediately if the tell-tale stream is not steady.\u003c\/p\u003e\n    \u003c\/details\u003e\n  \u003c\/section\u003e\n\n  \u003csection class=\"nbm-card\"\u003e\n    \u003ch2\u003eImportant Notes and Disclaimer\u003c\/h2\u003e\n    \u003cp\u003eThis Quickmarine product is an aftermarket replacement part, not an OEM original component. It is intended to replace compatible impellers in selected Nissan, Tohatsu, Mercury\/Mariner and related applications that use the listed part-number family.\u003c\/p\u003e\n    \u003cp\u003eBrand names, model names and part numbers such as Tohatsu, Nissan, Mercury, Mariner, Sierra, Mallory, 345-65021-0, 47-16154-1 and 18-8923 are used only for compatibility identification. They do not indicate that this product is produced by or affiliated with those brands.\u003c\/p\u003e\n    \u003cp\u003eBefore purchase, verify the old impeller, shaft bore, blade count, outside diameter, depth, engine model, serial range and official parts diagram. If any information conflicts with your original part, do not install the impeller until fitment is confirmed.\u003c\/p\u003e\n  \u003c\/section\u003e\n\u003c\/main\u003e\n\n\u003c\/body\u003e","brand":"Quick Marine","offers":[{"title":"Default Title","offer_id":55243319607587,"sku":null,"price":1277.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0989\/7384\/3747\/files\/345-65021-018-8923.jpg?v=1781678870","url":"https:\/\/quickmarines.com\/products\/45-65021-0-water-pump-impeller-tohatsu-nissan-25-40hp","provider":"Quick Marine","version":"1.0","type":"link"}