{"product_id":"sierra-18-3069-yamaha-mercury-mariner-impeller","title":"Sierra 18-3069 Yamaha\/Mercury\/Mariner Impeller","description":"\u003cp\u003eThe Sierra 18-3069 is a six-blade replacement lower-unit water pump impeller for compatible Mercury, Mariner and Yamaha outboards. It rotates inside the pump housing to draw cooling water through the gearcase and circulate it through the engine. The 47-3069 number is a distributor SKU for Sierra part 18-3069.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSierra manufacturer part number: 18-3069\u003c\/li\u003e\n\u003cli\u003eDistributor SKU: 47-3069\u003c\/li\u003e\n\u003cli\u003eSix flexible impeller blades\u003c\/li\u003e\n\u003cli\u003eCompatible with select Mercury, Mariner and Yamaha outboards\u003c\/li\u003e\n\u003cli\u003eReplaces Mercury\/Mariner 47-81423M, 47-82824M and 47-97108M\u003c\/li\u003e\n\u003cli\u003eReplaces Yamaha 697-44352-00-00 and 6H3-44352-00-00\u003c\/li\u003e\n\u003cli\u003eIncluded in multiple Sierra water pump kits, including 18-3425, 18-3434, 18-3415, 18-3464, 18-3465, 18-3466, 18-3494 and 18-3461\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eDocumented Yamaha applications include select:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e40 HP outboards\u003c\/li\u003e\n\u003cli\u003e48 HP outboards\u003c\/li\u003e\n\u003cli\u003e50 HP outboards\u003c\/li\u003e\n\u003cli\u003e55 HP outboards\u003c\/li\u003e\n\u003cli\u003e60 HP outboards\u003c\/li\u003e\n\u003cli\u003e70 HP outboards\u003c\/li\u003e\n\u003cli\u003eF50 and T50 four-stroke models\u003c\/li\u003e\n\u003cli\u003eF60 models from approximately 2002–2017\u003c\/li\u003e\n\u003cli\u003eT60 models from approximately 2003–2017\u003c\/li\u003e\n\u003cli\u003eF70A models from approximately 2010–2017\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMercury and Mariner compatibility is tied to water pump assemblies using OEM impeller numbers 47-81423M, 47-82824M or 47-97108M. These references are commonly associated with select 48, 55 and 60 HP outboards, but exact model and serial-number verification is required.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eDo not select this impeller by horsepower alone. Mercury, Mariner and Yamaha used different water pump assemblies across engines with similar horsepower ratings.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, confirm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete engine model and serial number\u003c\/li\u003e\n\u003cli\u003eProduction year\u003c\/li\u003e\n\u003cli\u003eGearcase and water pump configuration\u003c\/li\u003e\n\u003cli\u003eOriginal impeller number\u003c\/li\u003e\n\u003cli\u003eMercury reference 47-81423M, 47-82824M or 47-97108M\u003c\/li\u003e\n\u003cli\u003eYamaha reference 697-44352-00-00 or 6H3-44352-00-00\u003c\/li\u003e\n\u003cli\u003eImpeller bore and drive-key configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe original water pump parts diagram provides the safest fitment confirmation.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace the impeller if:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCooling-water flow becomes weak or intermittent\u003c\/li\u003e\n\u003cli\u003eThe engine begins operating hotter than normal\u003c\/li\u003e\n\u003cli\u003eAn overheat warning activates\u003c\/li\u003e\n\u003cli\u003eThe blades are cracked, torn, stiff or permanently bent\u003c\/li\u003e\n\u003cli\u003eRubber fragments are missing\u003c\/li\u003e\n\u003cli\u003eThe centre hub slips inside the impeller\u003c\/li\u003e\n\u003cli\u003eThe engine has been operated without cooling water\u003c\/li\u003e\n\u003cli\u003eThe motor has operated regularly in sandy or silty conditions\u003c\/li\u003e\n\u003cli\u003eThe recommended preventive-maintenance interval has been reached\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA worn impeller may continue rotating while no longer delivering enough water to cool the engine safely.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eLower-unit removal is normally required to access the water pump assembly. During service:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDisconnect the ignition and battery where applicable\u003c\/li\u003e\n\u003cli\u003eFollow the correct shift-linkage and lower-unit removal procedure\u003c\/li\u003e\n\u003cli\u003eInspect the pump housing, cup, wear plate, key, seals and driveshaft\u003c\/li\u003e\n\u003cli\u003eRemove broken impeller fragments from the cooling passages\u003c\/li\u003e\n\u003cli\u003eLubricate the impeller with clean soapy water or approved assembly lubricant\u003c\/li\u003e\n\u003cli\u003ePosition the drive key correctly\u003c\/li\u003e\n\u003cli\u003eRotate the driveshaft in its normal operating direction while lowering the housing over the blades\u003c\/li\u003e\n\u003cli\u003eReplace worn gaskets, O-rings and pump components\u003c\/li\u003e\n\u003cli\u003eReinstall the lower unit according to the engine service manual\u003c\/li\u003e\n\u003cli\u003eConfirm strong cooling-water flow before operating under load\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNever operate the outboard without an adequate cooling-water supply.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSierra: 18-3069\u003c\/li\u003e\n\u003cli\u003eDistributor SKU: 47-3069\u003c\/li\u003e\n\u003cli\u003eSierra catalogue reference: 118-3069\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner: 47-81423M\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner: 47-82824M\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner: 47-97108M\u003c\/li\u003e\n\u003cli\u003eMercury shortened references: 81423M, 82824M and 97108M\u003c\/li\u003e\n\u003cli\u003eYamaha: 697-44352-00-00\u003c\/li\u003e\n\u003cli\u003eYamaha: 6H3-44352-00-00\u003c\/li\u003e\n\u003cli\u003eGLM Marine: 89910\u003c\/li\u003e\n\u003cli\u003eMallory Marine: 9-45602\u003c\/li\u003e\n\u003cli\u003eMallory Marine: 9-45602-10\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe 47-3069 number can look like a Mercury OEM number, but it is the distributor SKU for Sierra 18-3069. Because this impeller crosses between Mercury\/Mariner and Yamaha applications, matching the original OEM number is more reliable than ordering by horsepower alone.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCompatible \u0026amp; Related Products\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eOther Sierra impellers and water pump kits for Yamaha and Mercury\/Mariner outboards:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3074-yamaha-mercury-mariner-impeller\"\u003eSierra 3074 Yamaha\/Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3073-yamaha-mercury-mariner-impeller\"\u003eSierra 3073 Yamaha\/Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3070-yamaha-impeller\"\u003eSierra 3070 Yamaha Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3071-yamaha-impeller\"\u003eSierra 3071 Yamaha Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3056-mercury-mariner-impeller\"\u003eSierra 3056 Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3434-yamaha-water-pump-repair-kit\"\u003eSierra 3434 Yamaha Water Pump Repair Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/quicksilver-8m6012796-impeller-repair-kit-yamaha-40-60hp\"\u003eQuicksilver 8M6012796 Impeller Repair Kit – Yamaha 40–60hp\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156142358564,"sku":"47-3069","price":82.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-3069.jpg?v=1784926906","url":"https:\/\/marisolmarine.com\/products\/sierra-18-3069-yamaha-mercury-mariner-impeller","provider":"Marisol Marine Company","version":"1.0","type":"link"}