{"product_id":"uanofcn-outboard-upper-water-pump-impeller-kit-for-mercury-8-25-hp-complete-upper-housing-impeller-gaskets","title":"UANOFCN Outboard Upper Water Pump Impeller Kit for Mercury 8-25 HP — Complete Upper Housing, Impeller \u0026 Gaskets","description":"\u003cp\u003e\u003cstrong\u003eThe UANOFCN 99157T2 is a complete upper water pump impeller repair kit designed to restore cooling flow on compatible Mercury 2- and 4-stroke outboards from 8 to 25 HP.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your Mercury outboard is running hotter than usual or you suspect reduced water circulation, this UANOFCN kit provides the upper housing, impeller, gaskets and small parts needed to rebuild the upper section of the water pump. It replaces several Mercury part numbers and covers a range of popular 2-stroke and 4-stroke engines, making it a practical option for DIY maintenance or for marine technicians servicing small-to-mid-sized outboards.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Mercury engines will this kit fit?\u003c\/h3\u003e\n\u003cp\u003eThe kit fits a variety of Mercury outboards across 2-stroke and 4-stroke families. Check the engine model and serial number to confirm compatibility before ordering, because similar engines may use different pump assemblies.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with many 2-stroke Mercury models: 15 hp, 18 hp, 20 hp, 25 hp.\u003c\/li\u003e\n  \u003cli\u003eCompatible with many 4-stroke Mercury models: 9.9 hp and 15 hp.\u003c\/li\u003e\n  \u003cli\u003eReplaces OEM part numbers including 99157T2, 85098A2 and 99157A2.\u003c\/li\u003e\n  \u003cli\u003eAlways verify your outboard model and s\/n to ensure the correct fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included in the repair kit?\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential upper pump components so you can replace worn or damaged items without sourcing multiple parts separately. The package groups the housing, seals and internal pieces you typically need for a thorough upper pump rebuild.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePump housing assembly and water tube guide sleeve for the upper pump section.\u003c\/li\u003e\n  \u003cli\u003eFlexible rubber impeller plus face plates and plate key for proper drive alignment.\u003c\/li\u003e\n  \u003cli\u003eGaskets, O-rings, and small seals including fill and vent screw O-rings to prevent leaks.\u003c\/li\u003e\n  \u003cli\u003eAdditional plates and a small quantity of gear lube fill\/vent screw components where required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will installing this kit affect engine cooling performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing a worn impeller and related seals restores the pump’s ability to move cooling water through the engine, reducing overheating risk and improving temperature stability. Properly installed components and fresh seals also reduce the chance of external leaks.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNew impeller restores maximum water flow rate through the pump housing.\u003c\/li\u003e\n  \u003cli\u003eFresh gaskets and O-rings restore sealing integrity around the upper housing.\u003c\/li\u003e\n  \u003cli\u003eCorrectly timed face plates and key ensure the impeller engages and pumps efficiently.\u003c\/li\u003e\n  \u003cli\u003ePrevents cavitation and loss of cooling due to degraded rubber or worn parts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before I attempt the replacement?\u003c\/h3\u003e\n\u003cp\u003eConfirm your outboard’s exact model and serial number against the kit’s compatibility list and inspect the lower pump and driveshaft for damage. If the lower pump, wear plate or driveshaft are badly scored or damaged, you may need additional parts beyond this upper kit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify engine model and s\/n to match Mercury part cross-references.\u003c\/li\u003e\n  \u003cli\u003eInspect the lower pump housing and water tube for scoring or corrosion.\u003c\/li\u003e\n  \u003cli\u003eCheck for bent or damaged driveshaft and coupling parts before reassembly.\u003c\/li\u003e\n  \u003cli\u003eHave basic marine tools and a clean workspace to avoid contaminating seals during install.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for?\u003c\/p\u003e\n\u003cp\u003eThis UANOFCN 99157T2 upper water pump impeller kit is ideal for boat owners, marina technicians, and DIY mechanics who maintain Mercury 8–25 HP outboards and want a ready-made upper pump rebuild solution. It suits anyone who needs genuine replacement-style components to restore cooling performance quickly, provided they confirm engine compatibility and inspect related lower-pump parts before ordering.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this kit include the impeller and seals?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit contains the rubber impeller, face plates, gaskets, O-rings and related small parts for the upper pump.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this kit on any Mercury outboard?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Only on compatible models listed (common 8–25 HP engines). Verify your engine model and serial number before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"UANOFCN","offers":[{"title":"Default Title","offer_id":48083668467870,"sku":"B07PCNYRYD","price":58.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/uanoftcn-99157t2-front-packaging.jpg?v=1785835130","url":"https:\/\/northtrailauto.ca\/products\/uanofcn-outboard-upper-water-pump-impeller-kit-for-mercury-8-25-hp-complete-upper-housing-impeller-gaskets","provider":"North Trail Auto","version":"1.0","type":"link"}