{"title":"Mercury 4-Stroke 9.9-20HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003cp\u003eThis page focuses on Mercury 4-Stroke 9.9–20HP outboard engines. Use it to find compatible parts and practical service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Mercury collection. Scroll to the bottom of the page to start browsing parts specific to this engine range, 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  \u003cdiv style=\"margin-top:8px;\"\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0a4; color:#fff; text-decoration:none; border-radius:4px;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 9.9–20HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eFind the serial\/nameplate on the transom clamp bracket or swivel bracket. The serial number is the key to identifying exact parts.\u003c\/li\u003e\n    \u003cli\u003eModel code suffixes indicate shaft length and controls. Common examples: S = 15\" short shaft, L = 20\" long, XL = 25\"; tiller vs. remote\/elec. start typically shown by additional letters.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke identifiers are shown on the cowling decal. Many 9.9\/15\/20HP share a two‑cylinder platform; differences include displacement (approx. 209–333 cc), carburetor vs. EFI, and jet drive variants.\u003c\/li\u003e\n    \u003cli\u003eCompare serial number to parts diagrams when possible; small updates between years can affect carb\/EFI components, ignition parts, and gearcase details.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eCarbureted 2‑Cylinder (approx. 209–323 cc)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline twin, 4‑stroke, carbureted. Typical displacements around 209–323 cc.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e9.9HP 4‑Stroke (multiple cc versions), 15HP 4‑Stroke, 20HP 4‑Stroke (2‑cyl carb). Short\/long shaft and tiller\/remote variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSimple, proven design; easy cold‑start setup; widely available service parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eMany wear items interchange across 9.9\/15\/20 within the same displacement family. Carb jetting, gear ratios, and some ignition components may differ by horsepower or year—verify by serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eEFI 2‑Cylinder (approx. 333 cc)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline twin, 4‑stroke, electronic fuel injection on later 15\/20HP models.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e15HP EFI, 20HP EFI. Offered in multiple shaft lengths and control options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eImproved fuel economy and throttle response; less sensitivity to temperature\/altitude than carbureted versions.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFuel and electrical components (injectors, high‑pressure filter, sensors) differ from carb models. Confirm by serial when ordering EFI parts.\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; max-width:1000px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical recreational use. Always follow the official Mercury service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eUse FC‑W 10W‑30 (or per manual). Warm engine before draining; replace crush washer if specified.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\" style=\"text-decoration:none;\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect for water intrusion or metal fines. Replace drain\/fill gaskets; reseal if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\" style=\"text-decoration:none;\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck gap and condition; replace if fouled, worn, or at interval.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\" style=\"text-decoration:none;\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eFuel filter \/ water‑separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e100 hours or annually (inspect sooner with stale or contaminated fuel)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eReplace inline\/under‑cowl filter; drain or replace external separator if equipped.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\" style=\"text-decoration:none;\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e2 seasons or 200 hours (inspect annually)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEssential for cooling. Replace more often in sandy\/silty water or if tell‑tale is weak.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\" style=\"text-decoration:none;\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect every 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eMatch alloy to water type (salt\/brackish\/fresh). Ensure good electrical contact.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\" style=\"text-decoration:none;\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eThermostat inspect\/replace\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect annually; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eOverheating or cool running can indicate a sticking thermostat.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"text-decoration:none;\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eValve clearance check (4‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePer service manual (often 300 hours)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAdjust if noisy start, rough idle, or performance changes. Requires shims\/parts as specified.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"text-decoration:none;\"\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; max-width:1000px;\"\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\" style=\"text-decoration:none;\"\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\" style=\"text-decoration:none;\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\" style=\"text-decoration:none;\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\" style=\"text-decoration:none;\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\" style=\"text-decoration:none;\"\u003eElectrical Items\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\" style=\"text-decoration:none;\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\" style=\"text-decoration:none;\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion \u0026amp; Hardware: \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\" style=\"text-decoration:none;\"\u003ePropellers\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\" style=\"text-decoration:none;\"\u003ePropeller Guards\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ccc; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect intake screens for blockage; check impeller condition; test thermostat.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWater pump kit, thermostat, intake screen, anodes (if corroded around passages)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck prop for damage\/cavitation; replace fuel filter; inspect spark plugs; verify throttle opens fully.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePropeller, fuel filter, spark plugs, air intake components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDrain stale fuel; verify primer bulb and lines; check plug gap; for EFI, confirm battery health and grounds.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSpark plugs, fuel filter\/lines, primer bulb, electrical connectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfirm oil level\/condition; look for water intrusion; check prop shaft for fishing line; pressure test and reseal if needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, bearings, gear lube, prop shaft seals\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; max-width:1000px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between 9.9, 15, and 20HP 4‑Stroke models?\u003c\/summary\u003e\n    \u003cp\u003eMany wear items and service parts interchange within the same two‑cylinder platform and displacement family. However, carb jetting, EFI components, ignition pieces, and gear ratios can vary by horsepower and year. Always confirm by serial number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace about every 2 seasons or 200 hours. Replace sooner if operating in sandy\/silty water or if the tell‑tale stream is weak.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or once per season. If the oil looks milky or contains metal fines, perform a pressure test and reseal the gearcase before returning to service.\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\u003ePlease provide the engine serial number, horsepower, approximate year, shaft length (S\/L\/XL), and whether it is carbureted or EFI. A photo of the nameplate and the part needing replacement helps ensure an exact match.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Mercury collection and use the filters to narrow to your exact 9.9–20HP 4‑Stroke outboard.\u003c\/p\u003e\n  \u003cdiv style=\"margin:8px 0 12px 0;\"\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0a4; color:#fff; text-decoration:none; border-radius:4px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003c\/div\u003e\n  \u003cp style=\"font-size:0.95em; color:#333;\"\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-impeller-kit-fits-mercury-9-9-20-hp-4-stroke-replaces-8m0135821-8m0137849","title":"Water Pump Repair Kit Without Housing for Mercury Mariner 9.9–20 HP 4-Stroke EFI – Replaces 8M0135821 and 8M0137849","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 \u003cstrong\u003eWater Pump Repair Kit Without Housing\u003c\/strong\u003e is intended for specified Mercury and Mariner 4-stroke EFI outboards. The company catalog identifies the Mercury\/Mariner application as a service kit supplied \u003cstrong\u003ewithout the water-pump housing\u003c\/strong\u003e. It is designed for Mercury\/Mariner 9.9 EFI models with serial numbers beginning at 1R00814 and 10, 15, and 20 EFI models with serial numbers beginning at 0R833820.\u003c\/p\u003e\n  \u003cp\u003eThis is an aftermarket repair kit, not a complete water-pump housing assembly. Reuse the existing housing only if it is serviceable and compatible with the replacement components.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eService-kit configuration for replacing worn water-pump components.\u003c\/li\u003e\n    \u003cli\u003eMercury\/Mariner application coverage is defined by engine model and serial-number range.\u003c\/li\u003e\n    \u003cli\u003eHousing is not included in the Mercury\/Mariner configuration recorded for this product.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse the following manufacturer reference numbers to compare your original part and confirm 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\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eManufacturer Reference\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\u003e8M0135821\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e98-8M0135821\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e90-8M0125267\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e8M0137849\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n          \u003ctd\u003e46-8M0135821\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003e3RS-87322-1\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eTohatsu\u003c\/td\u003e\n          \u003ctd\u003e3RS-87322\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eKeep the horsepower, stroke, model family, and serial-number conditions together when checking fitment. The Mercury\/Mariner applications below are the primary fitment recorded for the no-housing configuration.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Mercury Mariner Engine 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 Condition\u003c\/th\u003e\n          \u003cth\u003eReference Numbers\u003c\/th\u003e\n          \u003cth\u003eHousing\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\u003e9.9 EFI\u003c\/td\u003e\n          \u003ctd\u003e9.9\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1R00814 and above\u003c\/td\u003e\n          \u003ctd\u003e8M0135821, 98-8M0135821\u003c\/td\u003e\n          \u003ctd\u003eNot included\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003e10 EFI\u003c\/td\u003e\n          \u003ctd\u003e10\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n          \u003ctd\u003e8M0135821, 8M0137849\u003c\/td\u003e\n          \u003ctd\u003eNot included\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003e15 EFI\u003c\/td\u003e\n          \u003ctd\u003e15\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n          \u003ctd\u003e8M0135821, 8M0137849\u003c\/td\u003e\n          \u003ctd\u003eNot included\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n          \u003ctd\u003e20 EFI\u003c\/td\u003e\n          \u003ctd\u003e20\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n          \u003ctd\u003e8M0135821, 8M0137849\u003c\/td\u003e\n          \u003ctd\u003eNot included\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eThe company catalog also lists this product number for Nissan\/Tohatsu MFS15E and MFS20E applications under separate service-kit records. Those records describe a housing-included configuration, so do not use the Mercury\/Mariner no-housing contents for a Tohatsu order. Confirm the engine brand, model, stroke, original part number, and supplied-kit configuration before purchase.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eWater pump repair\/service kit\u003c\/dd\u003e\n    \u003cdt\u003ePrimary Application\u003c\/dt\u003e\n    \u003cdd\u003eMercury and Mariner 4-stroke EFI outboards\u003c\/dd\u003e\n    \u003cdt\u003eMercury\/Mariner Configuration\u003c\/dt\u003e\n    \u003cdd\u003eService kit without water-pump housing\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eReplacement of compatible water-pump service components using the existing serviceable housing\u003c\/dd\u003e\n    \u003cdt\u003eFitment Reference\u003c\/dt\u003e\n    \u003cdd\u003eMercury\/Mariner 9.9 EFI from 1R00814; 10, 15, and 20 EFI from 0R833820\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cp\u003eThe Mercury\/Mariner catalog entry identifies this product as a water-pump service kit \u003cstrong\u003ewithout the housing\u003c\/strong\u003e. The exact component list and quantities are not specified in the company record, so compare the supplied kit with the product images and your original parts before installation.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater-pump service components for the specified application\u003c\/li\u003e\n    \u003cli\u003eWater-pump housing: \u003cstrong\u003enot included for the Mercury\/Mariner configuration\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003eDo not assume that lubricant, bolts, a housing, or additional seals are included unless shown in the product package or confirmed for the applicable engine configuration.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eVerify the engine brand, model, stroke, horsepower, serial number, and original water-pump reference number before beginning work.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the battery and place the outboard in neutral.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit according to the engine manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump cover and inspect the existing housing, plate, driveshaft keyway, and mating surfaces.\u003c\/li\u003e\n    \u003cli\u003eBecause the Mercury\/Mariner configuration does not include a housing, replace or reuse the housing only after confirming that it is undamaged and compatible.\u003c\/li\u003e\n    \u003cli\u003eRemove old gasket material and debris without damaging the sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement service components in the correct orientation. Use an appropriate water-pump lubricant for impeller installation and do not use petroleum-based grease on the impeller.\u003c\/li\u003e\n    \u003cli\u003eReassemble the water-pump cover and lower unit, aligning the driveshaft, shift shaft, and water tube correctly.\u003c\/li\u003e\n    \u003cli\u003eTighten fasteners to the engine manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eRun the engine in water or with an appropriate flushing device and verify a steady tell-tale stream before normal operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm this kit fits my Mercury or Mariner engine?\u003c\/summary\u003e\n    \u003cp\u003eMatch all conditions, not just horsepower. The catalog lists 9.9 EFI models from serial number 1R00814 and 10, 15, and 20 EFI models from serial number 0R833820. Confirm the engine is a 4-stroke EFI model and compare the original water-pump reference number.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this Mercury\/Mariner kit include the water-pump housing?\u003c\/summary\u003e\n    \u003cp\u003eNo. The company catalog identifies the Mercury\/Mariner configuration as a water-pump service kit without housing. Inspect your existing housing and replace it separately if it is worn or damaged.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use the same listing for a Nissan or Tohatsu outboard?\u003c\/summary\u003e\n    \u003cp\u003eThe company catalog separately lists MFS15E and MFS20E applications with reference numbers 3RS-87322-1 and 3RS-87322. Those records describe a housing-included service-kit configuration. Confirm the exact brand, model, stroke, and package configuration before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing water-pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include a weak or intermittent tell-tale stream, overheating at idle or low speed, and a temperature warning. Stop operation and inspect the cooling system if overheating occurs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat lubricant should be used during installation?\u003c\/summary\u003e\n    \u003cp\u003eUse a suitable water-pump lubricant such as glycerin or a compatible silicone-based product as directed by the service procedure. Avoid petroleum-based grease on rubber impeller components.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is for an aftermarket replacement service kit. The manufacturer reference numbers are provided for application and part comparison only.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eConfirm the model, stroke, horsepower, serial range, and reference number before purchase.\u003c\/li\u003e\n    \u003cli\u003eFor the Mercury\/Mariner configuration, the water-pump housing is not included.\u003c\/li\u003e\n    \u003cli\u003eDo not operate an outboard with an uncertain or damaged cooling-system installation.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when removing the lower unit or servicing the cooling system.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Parts Focus\u003c\/strong\u003e — We supply replacement components for routine outboard service and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Based Listings\u003c\/strong\u003e — Fitment information is organized around engine model, stroke, horsepower, and serial conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService Support\u003c\/strong\u003e — Compare your original part and package contents before installation to help ensure the correct configuration.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723783803195,"sku":"24KM022","price":67.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Mercury_W-P_8M0135821_-_JLM_MARINE-8290071.jpg?v=1763031695"},{"product_id":"water-pump-repair-kit-fits-mercury-9-9-20-hp-4-stroke-replaces-8m0135821-98-8m0135821-8m0137849-3rs-87322-1","title":"Water Pump Service Kit with Housing – Fits Mercury Mariner 9.9–20 HP 4-Stroke EFI and Tohatsu MFS15E\/MFS20E","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\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\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\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\n  \/* Small screen optimization *\/\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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eWater Pump Service Kit with Housing\u003c\/strong\u003e is intended for specified Mercury Mariner 4-stroke EFI outboard models and Nissan\/Tohatsu MFS15E and MFS20E outboards. It is supplied as a service kit for renewing the water pump assembly and includes the housing specified for this product.\u003c\/p\u003e\n\u003cp\u003eFor Mercury Mariner applications, the listed engine coverage includes 9.9 EFI models with serial numbers starting at 1R00814 and 10, 15, and 20 EFI models with serial numbers starting at 0R833820. For Nissan\/Tohatsu applications, the listed fitment is MFS15E and MFS20E.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump service kit with housing.\u003c\/li\u003e\n  \u003cli\u003eDesigned for the specific engine families and serial-number ranges listed below.\u003c\/li\u003e\n  \u003cli\u003eUse the engine model and serial number to confirm fitment before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following manufacturer and reference numbers are associated with this service kit in the product catalog. Reference numbers should be matched to the engine application, not used independently of the fitment information.\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\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eApplication\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\u003e8M0135821\u003c\/td\u003e\n        \u003ctd\u003eMercury Mariner water pump service kit reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e98-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eMercury Mariner water pump service kit reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e90-8M0125267\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e8M0137849\u003c\/td\u003e\n        \u003ctd\u003eMercury Mariner water pump service kit reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e46-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003e3RS-87322-1\u003c\/td\u003e\n        \u003ctd\u003eFits listed MFS15E and MFS20E applications\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003e3RS-87322\u003c\/td\u003e\n        \u003ctd\u003eFits listed MFS15E and MFS20E applications\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\u003eConfirm both the engine model and serial-number range before ordering. The conditions below 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 No.\u003c\/th\u003e\n        \u003cth\u003eReference No.\u003c\/th\u003e\n        \u003cth\u003eNotes\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\u003e9.9 EFI\u003c\/td\u003e\n        \u003ctd\u003e9.9\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1R00814 and above\u003c\/td\u003e\n        \u003ctd\u003e8M0135821 \/ 98-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e10 EFI\u003c\/td\u003e\n        \u003ctd\u003e10\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n        \u003ctd\u003e8M0135821 \/ 98-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e15 EFI\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n        \u003ctd\u003e8M0135821 \/ 98-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Mariner\u003c\/td\u003e\n        \u003ctd\u003e20 EFI\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0R833820 and above\u003c\/td\u003e\n        \u003ctd\u003e8M0135821 \/ 98-8M0135821\u003c\/td\u003e\n        \u003ctd\u003eCatalog-listed application\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS15E\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eNot specified in the catalog record\u003c\/td\u003e\n        \u003ctd\u003e3RS-87322-1 \/ 3RS-87322\u003c\/td\u003e\n        \u003ctd\u003eConfirm the complete model designation before ordering\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan \/ Tohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS20E\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eNot specified in the catalog record\u003c\/td\u003e\n        \u003ctd\u003e3RS-87322-1 \/ 3RS-87322\u003c\/td\u003e\n        \u003ctd\u003eConfirm the complete model designation before ordering\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eWater pump service kit with housing\u003c\/dd\u003e\n  \u003cdt\u003eCompatible Stroke\u003c\/dt\u003e\n  \u003cdd\u003e4-Stroke applications listed in the compatibility table\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eService replacement for the water pump assembly; installation should follow the engine manufacturer's service procedure\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMercury Mariner 9.9 EFI, 10 EFI, 15 EFI, and 20 EFI models within the stated serial ranges; Nissan\/Tohatsu MFS15E and MFS20E\u003c\/dd\u003e\n  \u003cdt\u003eHousing\u003c\/dt\u003e\n  \u003cdd\u003eIncluded as part of the service kit\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cp\u003eThis product is a water pump service kit supplied with a housing. The company catalog does not specify the quantity or individual contents of every internal service component, so verify the kit contents against the product image and your original assembly before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump service kit\u003c\/li\u003e\n  \u003cli\u003eWater pump housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eVerify the engine brand, exact model, stroke, and serial-number range against the compatibility table.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and place the outboard in neutral before beginning service.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the engine manufacturer's service procedure, taking care around the shift linkage and water tube.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing water pump components and inspect the driveshaft, keyway, mating surfaces, and water passages for wear, corrosion, or blockage.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and install the service kit components in the correct order for the engine model.\u003c\/li\u003e\n  \u003cli\u003eEnsure the impeller, housing, seals, and related parts are correctly positioned before tightening fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit and reconnect the shift linkage and water tube as required.\u003c\/li\u003e\n  \u003cli\u003eTest the outboard using an appropriate water supply and confirm a strong tell-tale stream before returning the engine to normal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm this kit fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eMatch the complete engine information to the table. Mercury Mariner coverage is for 9.9 EFI engines starting at serial number 1R00814 and 10, 15, and 20 EFI engines starting at serial number 0R833820. Nissan\/Tohatsu coverage is listed for MFS15E and MFS20E. Do not rely on horsepower alone.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing water pump?\u003c\/summary\u003e\n  \u003cp\u003eCommon warning signs include a weak or intermittent tell-tale stream, overheating, an overheating alarm, or visible damage to the impeller and housing during inspection. Stop operating an overheating engine and identify the cause before further use.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat does this service kit include?\u003c\/summary\u003e\n  \u003cp\u003eThe catalog identifies this product as a water pump service kit with housing. Because the catalog record does not list quantities for each internal component, compare the product image and the contents of the received package with the parts required for your specific engine before starting work.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for a replacement service kit. The reference numbers identify compatible catalog applications and are not a statement that the replacement kit is manufactured by Mercury, Mariner, Nissan, or Tohatsu.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShould a professional install the kit?\u003c\/summary\u003e\n  \u003cp\u003eProfessional installation is recommended if you are not familiar with outboard lower-unit and water-pump service. Follow the manufacturer's service information for disassembly, assembly, sealing, and torque requirements.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm the exact model, stroke, and serial-number conditions before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not operate an outboard without an adequate water supply during testing.\u003c\/li\u003e\n  \u003cli\u003eInspect all removed and replacement parts for damage, corrosion, or incorrect fit before assembly.\u003c\/li\u003e\n  \u003cli\u003eFollow the engine manufacturer's service procedure and specified torque values.\u003c\/li\u003e\n  \u003cli\u003eThis is a replacement service kit; manufacturer names and part numbers are used only to identify applications and reference numbers.\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 Application Focus\u003c\/strong\u003e — We supply replacement parts for a range of outboard maintenance and repair applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment Information\u003c\/strong\u003e — Product listings identify engine models, stroke types, serial ranges, and reference numbers where available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService Support\u003c\/strong\u003e — Verify your engine information and the product contents before beginning installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723783835963,"sku":"21KM001","price":92.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Mercury_W-P_8M0135821_-_JLM_MARINE-8289956.jpg?v=1763031697"},{"product_id":"timing-belt-fits-tohatsu-mercury-yamaha-9-9-20-hp-replaces-3h8-10061-0-57-835392q-66m-46241-00-00","title":"Timing Belt for Yamaha F9.9\/F15, Mercury\/Mariner 9.9\/15, Tohatsu 9.9–20 HP and Evinrude\/Johnson 15 HP 4-Stroke Outboards","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\u003eengine timing belt\u003c\/strong\u003e is a direct replacement for selected 4-stroke marine outboards. It is sold as one belt and is intended to maintain correct camshaft-to-crankshaft timing during engine operation.\u003c\/p\u003e\n\u003cp\u003eCompany fitment records identify this belt for selected Yamaha F9.9 and F15 models, Mercury and Mariner 9.9 HP and 15 HP 4-stroke models within the listed serial-number ranges, Tohatsu 9.9–20 HP 4-stroke outboards, and Evinrude\/Johnson\/OMC\/BRP 15 HP 4-stroke applications. Confirm the complete model and serial-number conditions before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Replacement engine timing belt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One belt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Selected 4-stroke outboard engines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintenance guidance:\u003c\/strong\u003e The company catalog recommends replacement at 5 years or 100 hours of use, subject to the engine manufacturer's service instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the manufacturer reference for your specific engine when confirming compatibility. Reference numbers are listed by application and should not be treated as universal fitment across every engine model.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eManufacturer Reference\u003c\/th\u003e\n\u003cth\u003eAftermarket Reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha Outboard\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003ctd\u003e18-15137\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n\u003ctd\u003e835392Q; 57-835392Q; 57835392Q; 895120002; 57-895120002\u003c\/td\u003e\n\u003ctd\u003e18-15147\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude \/ Johnson \/ OMC \/ BRP\u003c\/td\u003e\n\u003ctd\u003e5041079\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eFitment depends on the brand, model, production period, and—especially for Mercury and Mariner engines—the serial-number range. Match all available information before installation.\u003c\/p\u003e\n\n\u003ch3\u003eYamaha 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Compatibility\"\u003e\n    \u003cthead\u003e\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\u003eYears\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2006\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2005\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eMercury and Mariner 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Mercury and Mariner Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eSerial Number Range\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\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G760300–1B226999\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G760300–1B226999\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1B227000–1B727495\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor Mercury and Mariner applications, the serial-number range is part of the fitment specification. Do not rely on horsepower alone.\u003c\/p\u003e\n\n\u003ch3\u003eTohatsu 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Tohatsu Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 9.9 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 15 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 18 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 20 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEvinrude, Johnson, OMC and BRP 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Evinrude and Johnson Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude \/ Johnson \/ OMC \/ BRP\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 15 HP outboards\u003c\/td\u003e\n\u003ctd\u003e5041079\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\u003eEngine timing belt\u003c\/dd\u003e\n  \u003cdt\u003ePart Configuration\u003c\/dt\u003e\n\u003cdd\u003eSingle replacement belt; not a complete timing-belt service kit\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected 4-stroke gasoline outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement when the application and reference number match\u003c\/dd\u003e\n  \u003cdt\u003eIncluded Components\u003c\/dt\u003e\n\u003cdd\u003eOne timing belt\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Engine timing belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTensioners, pulleys, seals, keys, covers, and other engine components are not included.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the engine, disconnect the battery where applicable, and allow the engine to cool before service.\u003c\/li\u003e\n  \u003cli\u003eRemove the cowling and timing-belt covers according to the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eSet the crankshaft and camshaft to the manufacturer's specified timing positions before removing the old belt.\u003c\/li\u003e\n  \u003cli\u003eInspect the pulleys, tensioner, seals, and surrounding components for wear, contamination, or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement belt without forcing, twisting, or contaminating it with oil or fuel.\u003c\/li\u003e\n  \u003cli\u003eSet belt tension and verify all timing marks using the correct service manual.\u003c\/li\u003e\n  \u003cli\u003eRotate the engine by hand as specified by the manufacturer and recheck timing before starting the engine.\u003c\/li\u003e\n  \u003cli\u003eReinstall the covers and all removed components, then test the engine for correct operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eTiming-belt installation requires accurate timing alignment. Professional installation is recommended if the required tools or service information are not available.\u003c\/p\u003e\n\n\u003ch2\u003eMaintenance and FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this belt fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eMatch the engine brand, model, horsepower, stroke, production year where listed, and Mercury or Mariner serial-number range against the compatibility tables. Also compare the manufacturer reference on the existing belt or in the engine parts manual.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the timing belt be replaced?\u003c\/summary\u003e\n  \u003cp\u003eThe company catalog recommends a 5-year or 100-hour maintenance interval. Always follow the engine manufacturer's service manual if it specifies a different interval or inspection procedure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are signs that a timing belt may need replacement?\u003c\/summary\u003e\n  \u003cp\u003eCracking, fraying, missing or damaged teeth, oil contamination, abnormal slack, or visible wear are reasons to stop using the belt and inspect the complete timing system. An engine that runs poorly or will not start may have timing-system problems, but diagnosis should be performed before replacing parts.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete timing-belt kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for one timing belt only. Tensioners, pulleys, seals, keys, and other components are not included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM belt?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement belt. The manufacturer references shown above are provided for application identification and cross-reference purposes.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete engine identification and reference number before ordering.\u003c\/li\u003e\n  \u003cli\u003eMercury and Mariner compatibility is serial-number dependent; horsepower alone is not sufficient.\u003c\/li\u003e\n  \u003cli\u003eDo not install a belt that is damaged, contaminated, or visibly different from the required part.\u003c\/li\u003e\n  \u003cli\u003eIncorrect timing-belt installation can cause serious engine damage. Use the manufacturer's service manual.\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 — Parts selected for common outboard maintenance and repair applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Compatibility information is organized by engine brand, model, horsepower, stroke, year, and serial range where available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintenance Support\u003c\/strong\u003e — Clear product information helps you confirm the correct replacement before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723984376123,"sku":"23BL223","price":46.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL223_1.jpg?v=1763039410"}],"url":"https:\/\/seasierra.com\/collections\/mercury-4-stroke-9-9-20hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}