{"title":"Mercury 4-Stroke 15-25HP Outboard Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eBuilt for Mercury 4‑Stroke 15–25HP outboard engines, this page helps you quickly find compatible parts and essential service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection for a wider selection. Scroll to the bottom of this page to start browsing parts for this engine, and use the “Filter \u0026amp; Sort” controls on the collection page to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #222;border-radius:6px;text-decoration:none;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 15–25HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/nameplate on the transom bracket or swivel bracket; record the full serial number and any model code.\u003c\/li\u003e\n    \u003cli\u003eModel suffixes may indicate shaft length (S\/L\/XL), tiller vs. remote control, and electric start. These details affect parts such as control cables, wiring, and propellers.\u003c\/li\u003e\n    \u003cli\u003e15–20HP FourStroke models are typically inline‑2; 25HP FourStroke models are commonly inline‑3 EFI. Knowing which platform you have improves parts accuracy.\u003c\/li\u003e\n    \u003cli\u003eSome 25HP variants use standard vs. “big” gearcases (often marketed as Command Thrust\/BigFoot). Propellers and gearcase seals differ—verify by serial number.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eMercury FourStroke 15–20HP\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInline‑2 FourStroke; earlier units are carbureted, later units use EFI depending on year\/region.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003e15HP FourStroke, 20HP FourStroke in short\/long shaft, tiller or remote, manual or electric start.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eLightweight, quiet operation, excellent fuel economy for small craft and tenders.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eMany service items cross‑over within the 15–20HP family. Always confirm by serial number for filters, anodes, and water pump kits.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMercury FourStroke 25HP (EFI)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;margin-top:10px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInline‑3 FourStroke with electronic fuel injection (EFI) for smooth throttle response and reliable starting.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003e25HP EFI FourStroke in short\/long shaft, tiller or remote. Some variants use standard vs. larger gearcases.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eStrong mid‑range torque, precise fueling, and dependable operation for utility and fishing boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eShares several filters and service items with related 25–30HP EFI families. Use the serial number to select correct impeller kits, anodes, and fuel filters.\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 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for FourStroke models. Always follow the official Mercury service manual for your exact engine and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eChange oil and replace the filter; warm the engine first for complete drainage.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect magnet and oil for metal or water intrusion; replace drain\/fill gaskets.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\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 style=\"padding:6px 8px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect 100 hours; replace ~300 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eCheck gap and condition; replace sooner if fouled or misfiring.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\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 style=\"padding:6px 8px;\"\u003eFuel filter \/ in‑line filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eReplace to prevent lean conditions and hard starting; drain any water separators.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\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 style=\"padding:6px 8px;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect annually; replace every 2 seasons or ~200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eCritical for cooling flow; replace sooner if weak telltale or overheat warnings appear.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\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 style=\"padding:6px 8px;\"\u003eAnodes (zinc\/aluminum\/magnesium)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect frequently; replace when ~50% eroded\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eChoose alloy for your water type (salt, brackish, fresh) to protect the engine.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eThermostat \u0026amp; gasket\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect 200 hours; replace if sticking\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eStuck thermostats cause over‑cooling or overheat conditions and poor fuel economy.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\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 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \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\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\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Sealing: \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\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eWeak telltale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eInspect intake screens for debris; verify impeller condition; test thermostat opening temperature.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eWater pump kit, thermostat, intake screen, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003ePoor acceleration or loss of power\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eCheck for damaged or incorrect‑pitch prop; replace clogged fuel filter; confirm engine reaches rated WOT RPM.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eVerify fresh fuel and proper priming; check battery voltage; inspect plugs; on EFI models, rule out low fuel pressure or injector issues.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eSpark plugs, fuel filter, injectors, battery cables\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eGearcase noise or metal flakes in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eDrain and inspect gear oil; check for water intrusion; pressure\/vacuum test gearcase and inspect seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;\"\u003eLower unit seal kit, drain screw gaskets, bearings\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 0;\"\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\u003eSome routine items (plugs, anodes, filters) may interchange within the same family, but many parts—especially gearcase, cooling, and fuel components—are serial‑number specific. Always confirm with the engine serial number and model details.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace about every two seasons or ~200 hours, sooner if you see a weak telltale, elevated temperature, or if the engine was run dry.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually. If the oil looks milky or you find metal on the magnet, service the seals and inspect internal gears and bearings.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the engine serial number, horsepower, shaft length, control type (tiller\/remote), starting method (manual\/electric), and whether your 25HP is standard or large‑gearcase. Photos of the nameplate and the part in question also help.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find the right parts? Browse the main Mercury collection and refine by horsepower, year, and model to match your engine.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;margin-top:6px;padding:10px 14px;border:1px solid #222;border-radius:6px;text-decoration:none;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;font-size:0.95em;\"\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-repair-kit-fits-mercury-mariner-9-9-15-hp-4-stroke-outboards-replaces-99157t2","title":"Impeller Repair Kit for Mercury\/Mariner Outboards – Replaces 46-99157T2 and 46-99157A02","description":"\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\u003eImpeller Repair Kit\u003c\/strong\u003e is designed to service the water pump on selected Mercury and Mariner outboards. It replaces the water-pump repair-kit references \u003cstrong\u003e46-99157T2\u003c\/strong\u003e and \u003cstrong\u003e46-99157A02\u003c\/strong\u003e in applicable applications. The kit is intended for replacing worn pump components during routine cooling-system maintenance or water-pump repair.\u003c\/p\u003e\n  \u003cp\u003eFitment depends on the engine model, water-pump configuration, gear ratio, and serial-number range. Always compare the original pump, part number, and engine serial number before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Aftermarket impeller repair kit\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService function:\u003c\/strong\u003e Water-pump and cooling-system maintenance\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Replacement service in the lower-unit water-pump assembly\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBrand status:\u003c\/strong\u003e Aftermarket replacement; not an OEM component\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThe following manufacturer references are associated with this water-pump repair-kit application. Number formats and component descriptions can vary between catalogs.\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\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eReference\u003c\/th\u003e\n          \u003cth\u003eReference type\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e46-99157T2\u003c\/td\u003e\n          \u003ctd\u003eWater-pump kit or repair-kit reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e46-99157A02\u003c\/td\u003e\n          \u003ctd\u003eWater-pump assembly or replacement reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e99157T2\u003c\/td\u003e\n          \u003ctd\u003eCatalog reference without prefix\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e99157A2\u003c\/td\u003e\n          \u003ctd\u003eCatalog reference without prefix\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e99157A02\u003c\/td\u003e\n          \u003ctd\u003eCatalog reference without prefix\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e85098A2\u003c\/td\u003e\n          \u003ctd\u003eAssociated catalog reference\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\u003eCatalog records associate this water-pump reference with the following engine applications. The model, stroke, gear-ratio configuration, and serial-number range must be considered together.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eSerial-number condition\u003c\/th\u003e\n          \u003cth\u003eConfiguration notes\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e8 Bodensee\u003c\/td\u003e\n          \u003ctd\u003e8\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0P086824 through 0P400999\u003c\/td\u003e\n          \u003ctd\u003eInternational model; 2.42:1 gear-ratio water-pump housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e9.9\u003c\/td\u003e\n          \u003ctd\u003e9.9\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0G760300 through 1B226999\u003c\/td\u003e\n          \u003ctd\u003e323 cc application; 2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e9.9\u003c\/td\u003e\n          \u003ctd\u003e9.9\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0P075166 through 0P400999\u003c\/td\u003e\n          \u003ctd\u003e323 cc application; 2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e13.5 International\u003c\/td\u003e\n          \u003ctd\u003e13.5\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0P134638 through 0P400999\u003c\/td\u003e\n          \u003ctd\u003e2.42:1 gear-ratio water-pump housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0G590000 through 0G760299\u003c\/td\u003e\n          \u003ctd\u003e2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0G760300 through 1B226999\u003c\/td\u003e\n          \u003ctd\u003e2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e15 BigFoot\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1B227000 through 1B727495\u003c\/td\u003e\n          \u003ctd\u003eBigFoot lower unit; 2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e9973100 through 0P016999\u003c\/td\u003e\n          \u003ctd\u003e2.42:1 gear-ratio housing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e15 Sea Pro \/ XD\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003eVerify engine configuration\u003c\/td\u003e\n          \u003ctd\u003e9927000 through 0P016999\u003c\/td\u003e\n          \u003ctd\u003e2.25:1 gear-ratio and jet-water-pump catalog applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e15 Sea Pro \/ XD\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003eVerify engine configuration\u003c\/td\u003e\n          \u003ctd\u003e0P017000 through 0P325499\u003c\/td\u003e\n          \u003ctd\u003e2.25:1 gear-ratio and jet-water-pump catalog applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e18\u003c\/td\u003e\n          \u003ctd\u003e18\u003c\/td\u003e\n          \u003ctd\u003eVerify engine configuration\u003c\/td\u003e\n          \u003ctd\u003e5837437 through 6416712; other ranges also cataloged\u003c\/td\u003e\n          \u003ctd\u003eGear-housing water-pump application; verify the pump design before ordering\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e20 Jet\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003eVerify engine configuration\u003c\/td\u003e\n          \u003ctd\u003e0G044027 through 0G760299\u003c\/td\u003e\n          \u003ctd\u003e2.25:1 gear-ratio and jet-water-pump applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003eAdditional XD and 25 hp applications\u003c\/td\u003e\n          \u003ctd\u003e15–25\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke applications listed in aftermarket catalogs\u003c\/td\u003e\n          \u003ctd\u003eVerify exact serial-number range\u003c\/td\u003e\n          \u003ctd\u003eDo not use the 4-Stroke fitment rows as confirmation for these applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cp\u003eThis repair kit is supplied as a service-component package. Confirm the physical contents against the product images and the existing pump assembly before installation.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water-pump housing or housing component\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Face plate or wear-plate component\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water-pump impeller\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Impeller key\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Pump gasket\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Water-pump seal\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Washer\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e4 x\u003c\/span\u003e Grommet\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e6 x\u003c\/span\u003e O-ring in the applicable service sizes\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eComponent quantity and configuration can vary by application. The kit does not include a complete lower unit, driveshaft, gearcase, or engine.\u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and remove the spark-plug leads before beginning service.\u003c\/li\u003e\n    \u003cli\u003ePlace a drain pan under the lower unit and drain the gearcase lubricant according to the engine manufacturer’s procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit while supporting it securely. Keep the driveshaft, shift shaft, and water tube aligned during removal.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump housing and note the order and orientation of the impeller, key, plate, gaskets, seals, and washers.\u003c\/li\u003e\n    \u003cli\u003eClean the mating surfaces and inspect the driveshaft, keyway, pump plate, housing, and water-tube grommet for wear or damage.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement plate, gasket, seal, key, and impeller in the same order as the original components. Use the correct impeller rotation for the engine.\u003c\/li\u003e\n    \u003cli\u003eFit the pump housing and tighten the fasteners to the engine manufacturer’s specified torque.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, confirming proper engagement of the driveshaft, shift shaft, and water tube.\u003c\/li\u003e\n    \u003cli\u003eRefill the gearcase with the correct marine gear lubricant and check for leaks.\u003c\/li\u003e\n    \u003cli\u003eRun the engine in a suitable test tank or in the water and confirm a strong, steady tell-tale stream before returning the engine to service.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eMaintenance \u0026amp; Troubleshooting\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eMatch the engine brand, model, horsepower, stroke, gear-ratio configuration, and complete serial-number range. Compare the old pump and impeller with the product images before ordering. A horsepower match alone is not sufficient.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat symptoms indicate a worn water-pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include a weak or missing tell-tale stream, overheating, steam, an overheating warning, or a brittle, cracked, deformed, or melted impeller found during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the impeller as part of regular cooling-system maintenance and replace it when it shows cracking, hardening, vane damage, deformation, or loss of flexibility. Frequent saltwater, sandy, or silty use may require more frequent inspection.\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 repair kit intended for the listed applications. Mercury, Mariner, and other manufacturer names and part numbers are used only to identify compatible applications and references.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this product replace a complete water-pump assembly?\u003c\/summary\u003e\n    \u003cp\u003eThis product is a repair kit for servicing the water pump. It should not be treated as a complete installed pump assembly or as a replacement for the entire lower unit.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the exact model and serial number before purchase.\u003c\/li\u003e\n    \u003cli\u003eDo not mix fitment data from different engine configurations or gear-ratio versions.\u003c\/li\u003e\n    \u003cli\u003eInspect all mating surfaces and related cooling-system components before reassembly.\u003c\/li\u003e\n    \u003cli\u003eUse the manufacturer’s service manual for torque values, lubricant specifications, and detailed installation procedures.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump service is unfamiliar.\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 — Practical aftermarket components for routine service and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-focused listings\u003c\/strong\u003e — Fitment information is organized around model, configuration, and serial-number conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupport for maintenance work\u003c\/strong\u003e — Product information is provided to help customers compare replacement parts before installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723784032571,"sku":"SIE-18KM006","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Mercury_-_Force_-_Mariner_47-85089T7_-_JLM_MARINE-8290146.jpg?v=1763031705"},{"product_id":"water-pump-impeller-kit-fits-mercury-mariner-9-9-25-hp-replaces-46-99157t2-85098a2-99157a2","title":"Water Pump Repair Kit with Housing – Fits Mercury\/Mariner 2-Stroke 15–25 HP and 4-Stroke 9.9–15 HP (Replaces 46-99157T2, 46-99157A02, 85098A2, 99157A2)","description":"\u003csection\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump repair kit with pump housing\u003c\/strong\u003e is designed for selected Mercury and Mariner outboard applications. It is listed for 2-Stroke 15–25 HP models and selected 4-Stroke 9.9–15 HP BigFoot models. The kit is intended to restore water-pump service components and includes the pump housing identified for this application.\u003c\/p\u003e\n\u003cp\u003eUse the OEM reference numbers, engine type, model designation, and serial-number range together when confirming fitment. A horsepower match alone does not guarantee compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump service kit with pump housing.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement for selected Mercury and Mariner outboards.\u003c\/li\u003e\n  \u003cli\u003eSuitable for listed 2-Stroke, 4-Stroke, BigFoot, Sea Pro, Marathon, Super 15, and XD applications when the complete fitment conditions match.\u003c\/li\u003e\n  \u003cli\u003eNot manufactured or sold as a genuine Mercury component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following numbers are customer-facing manufacturer or aftermarket reference numbers associated with this water-pump application. They are provided for cross-reference only; verify the complete engine application before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference Number\u003c\/th\u003e\n\u003cth\u003eReference Type\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e46-99157T2\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003e46-99157A02\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e85098A2\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e99157A2\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e99157T2\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGLM Marine\u003c\/td\u003e\n\u003ctd\u003e12014\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3320\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-48300\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\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\u003eCompatibility conditions must be kept together. Confirm the exact model, engine type, and serial-number range against your engine identification label or the original water-pump part before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\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\u003eSerial or Model Condition\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e9.9 BigFoot, 323 cc\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eUSA 0G760300–0T979999; Belgium 0P075166–0P400999\u003c\/td\u003e\n\u003ctd\u003e46-99157T2 \/ 46-99157A02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e13.5 International\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0P134638–0P400999 and 0P401000 \u0026amp; up\u003c\/td\u003e\n\u003ctd\u003e46-99157T2 \/ 46-99157A02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e15 BigFoot, 323 cc\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G760300–1B226999, 0P075166–0P400999, 1B227000–1B727495, or 0P401000 \u0026amp; up, as applicable\u003c\/td\u003e\n\u003ctd\u003e46-99157T2 \/ 46-99157A02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e15 Sea Pro (XD)\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e9927000–0P016999 or 0P017000–0P325499, as applicable\u003c\/td\u003e\n\u003ctd\u003e46-99157T2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e15XD, 18XD, 20XD, 25XD\u003c\/td\u003e\n\u003ctd\u003e15–25\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eModel family application; catalog references indicate 1984 and later for the listed family\u003c\/td\u003e\n\u003ctd\u003e46-99157T2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eUse the model-specific serial range; multiple 18 HP catalog ranges are listed\u003c\/td\u003e\n\u003ctd\u003e46-99157T2 \/ 46-99157A02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e20 Jet\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G044027–0G760299; confirm Jet water-pump diagram and serial range\u003c\/td\u003e\n\u003ctd\u003e46-99157T2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e25 Sea Pro, Marathon, or Super 15\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eConfirm the model designation and serial range before purchase\u003c\/td\u003e\n\u003ctd\u003e46-99157T2 \/ 46-99157A02\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eAdditional company-listed application\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003eVerify the exact model and serial number; no universal 50 HP fitment is implied\u003c\/td\u003e\n\u003ctd\u003eCompany application listing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater pump repair\/service kit with pump housing\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected Mercury and Mariner outboard water-pump assemblies\u003c\/dd\u003e\n  \u003cdt\u003eStroke Coverage\u003c\/dt\u003e\n\u003cdd\u003eSelected 2-Stroke 15–25 HP and 4-Stroke 9.9–15 HP applications\u003c\/dd\u003e\n  \u003cdt\u003ePump Housing\u003c\/dt\u003e\n\u003cdd\u003eIncluded according to the company product record\u003c\/dd\u003e\n  \u003cdt\u003eBrand Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement; not a genuine Mercury component\u003c\/dd\u003e\n  \u003cdt\u003ePrimary Aftermarket Reference\u003c\/dt\u003e\n\u003cdd\u003eGLM Marine 12014\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cp\u003eThe company product record identifies this item as a water pump service kit \u003cstrong\u003ewith pump housing\u003c\/strong\u003e. The service kit is intended for the listed water-pump application. Exact seal, gasket, washer, key, and hardware contents may vary by production batch, so compare the package and product images with the components required for your engine before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water pump housing assembly\u003c\/li\u003e\n  \u003cli\u003eWater-pump service components for the listed application\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eConfirm the complete engine model, stroke, and serial-number range before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery where applicable, remove the lanyard, and follow the engine manufacturer's safety procedures.\u003c\/li\u003e\n  \u003cli\u003ePlace the outboard in a stable position and remove the lower unit according to the service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the old water-pump housing and service components. Clean the mating surfaces and inspect the driveshaft, keyway, water tube, and sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003eTransfer or install only the components supplied for your application. Do not reuse damaged gaskets, seals, keys, or fasteners.\u003c\/li\u003e\n  \u003cli\u003eInstall the impeller and housing in the correct direction, using suitable lubricant where specified by the service manual.\u003c\/li\u003e\n  \u003cli\u003eTorque fasteners to the manufacturer's specification and ensure the water tube and shift shaft are correctly aligned when reinstalling the lower unit.\u003c\/li\u003e\n  \u003cli\u003eRun the engine only in a proper test tank or in the water. Confirm a strong, consistent tell-tale stream and check for leaks or overheating.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm fitment for my engine?\u003c\/summary\u003e\u003cp\u003eMatch the engine brand, model designation, stroke, horsepower, and complete serial-number range to the compatibility information above. Also compare the old pump assembly and OEM reference number. If any condition differs, do not assume the part will fit.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this product include the pump housing?\u003c\/summary\u003e\u003cp\u003eYes. The company product record describes this item as a water pump service kit with pump housing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this a genuine Mercury part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement associated with the listed Mercury and Mariner applications and reference numbers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat symptoms indicate a worn water-pump service assembly?\u003c\/summary\u003e\u003cp\u003eCommon symptoms include a weak or intermittent tell-tale stream, overheating at idle or low speed, reduced cooling-water flow, or no water discharge. Stop the engine if overheating occurs to prevent serious damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should the impeller be serviced?\u003c\/summary\u003e\u003cp\u003eService intervals depend on the engine manufacturer, operating hours, and water conditions. Inspect and replace the impeller and related service components according to the engine service manual, especially after operation in saltwater, sand, or silt.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eAre all seals and hardware included?\u003c\/summary\u003e\u003cp\u003eThe product is identified as a service kit with housing, but the company record does not provide a complete component-by-component quantity list. Confirm the supplied contents against the product images and your engine service requirements before installation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat warranty and return terms apply?\u003c\/summary\u003e\u003cp\u003eWarranty and return terms are determined by the store's current policy. Contact customer support before installation if the received contents or fitment differs from the listing.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eAlways verify the complete model and serial-number conditions before ordering.\u003c\/li\u003e\n  \u003cli\u003eDo not operate an outboard without adequate cooling-water flow.\u003c\/li\u003e\n  \u003cli\u003eUse the manufacturer's service manual for torque values, disassembly procedures, and installation direction.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when lower-unit removal or water-pump service is unfamiliar.\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 — Practical aftermarket components for routine outboard service and repair.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Model, stroke, and serial conditions are provided to help customers verify compatibility.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport Before Installation\u003c\/strong\u003e — Contact support if the received part or package contents do not match the listing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723784065339,"sku":"18KM006","price":46.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Mercury_2_Str_15-25_HP_4_Str_99-15_HP_99157T2_-_JLM_MARINE-8288065.jpg?v=1763031706"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-15-25hp-outboard-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}