{"product_id":"sierra-18-3067-mercury-mariner-yamaha-impeller","title":"Sierra 18-3067 Mercury\/Mariner\/Yamaha Impeller","description":"\u003cp\u003eThe Sierra 18-3067 is a six-blade replacement lower-unit water pump impeller for select Mercury, Mariner and Yamaha outboards. It installs inside the gearcase water pump and circulates cooling water through the engine. The 47-3067 number is a distributor SKU for Sierra part 18-3067. It replaces Mercury\/Mariner impellers 47-81604M and 47-84797M, along with Yamaha 689-44352-00-00, 689-44352-01-00 and 689-44352-02-00.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSierra manufacturer part number: 18-3067\u003c\/li\u003e\n\u003cli\u003eDistributor SKU: 47-3067\u003c\/li\u003e\n\u003cli\u003eSix flexible neoprene blades\u003c\/li\u003e\n\u003cli\u003eApproximately 2-1\/4-inch outside diameter\u003c\/li\u003e\n\u003cli\u003eApproximately 1\/2-inch depth\u003c\/li\u003e\n\u003cli\u003eDesigned for select Mercury, Mariner and Yamaha outboards\u003c\/li\u003e\n\u003cli\u003eIncluded in Sierra water pump kits 18-3426 and 18-3427\u003c\/li\u003e\n\u003cli\u003eSupplied as one replacement impeller\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315199\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe strongest documented applications are select Mercury, Mariner and Yamaha outboards in the approximately 20–30 HP range, including many 25 HP applications. Catalogue references associate this impeller with selected engines manufactured from the late 1970s through the 1990s, including certain Mercury 28 HP and Yamaha 25 and 30 HP models. Exact compatibility depends on the complete engine model, production year, serial number and gearcase water pump configuration.\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 gearcases and water pump configurations within similar horsepower ranges.\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 assembly\u003c\/li\u003e\n\u003cli\u003eOriginal impeller number\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner reference 47-81604M or 47-84797M\u003c\/li\u003e\n\u003cli\u003eYamaha reference 689-44352-00-00, 689-44352-01-00 or 689-44352-02-00\u003c\/li\u003e\n\u003cli\u003eImpeller diameter, depth and drive-key arrangement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe original engine water pump diagram provides the most reliable 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 discharge 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 scheduled water pump service interval has been reached\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRunning the pump dry or operating in sand and silt can quickly damage the impeller and reduce cooling-water flow.\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, drive key, seals and driveshaft\u003c\/li\u003e\n\u003cli\u003eRemove broken impeller fragments from the pump and cooling passages\u003c\/li\u003e\n\u003cli\u003eLubricate the impeller with clean soapy water or an 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: 18-3067\u003c\/li\u003e\n\u003cli\u003eDistributor SKU: 47-3067\u003c\/li\u003e\n\u003cli\u003eSierra catalogue reference: 118-3067\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner: 47-81604M\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner: 47-84797M\u003c\/li\u003e\n\u003cli\u003eMercury shortened references: 81604M and 84797M\u003c\/li\u003e\n\u003cli\u003eYamaha: 689-44352-00-00\u003c\/li\u003e\n\u003cli\u003eYamaha: 689-44352-01-00\u003c\/li\u003e\n\u003cli\u003eYamaha: 689-44352-02-00\u003c\/li\u003e\n\u003cli\u003eGLM Marine: 89890\u003c\/li\u003e\n\u003cli\u003eMallory Marine: 9-45600\u003c\/li\u003e\n\u003cli\u003eUPC: 030999315199\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe 47-3067 number can resemble a Mercury OEM number, but it is the distributor SKU for Sierra 18-3067. Because this impeller crosses between Mercury\/Mariner and Yamaha applications, matching the original OEM number and pump diagram 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 impellers and water pump kits for Mercury\/Mariner and Yamaha outboards available at Marisol Marine:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3068-yamaha-impeller\"\u003eSierra 18-3068 Yamaha Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-18-3069-yamaha-mercury-mariner-impeller\"\u003eSierra 18-3069 Yamaha\/Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3056-mercury-mariner-impeller\"\u003eSierra 3056 Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3073-yamaha-mercury-mariner-impeller\"\u003eSierra 3073 Yamaha\/Mercury\/Mariner Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/sierra-3070-yamaha-impeller\"\u003eSierra 3070 Yamaha Impeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mercury-quicksilver-water-pump-repair-kit-25-30hp-4-stroke-853792a07\"\u003eMercury Quicksilver Water Pump Repair Kit 25–30HP 4-Stroke 853792A07\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156142293028,"sku":"47-3067","price":69.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/898a8c19-875d-4753-a2e3-5659d3ef5cca.png?v=1785127765","url":"https:\/\/marisolmarine.com\/products\/sierra-18-3067-mercury-mariner-yamaha-impeller","provider":"Marisol Marine Company","version":"1.0","type":"link"}