{"title":"Tohatsu 2-Stroke 10HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page covers Tohatsu 2‑Stroke 10HP outboard engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Tohatsu collection for a wider range of components. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a6;border-radius:6px;text-decoration:none;\"\u003eBrowse All Tohatsu Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 10HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: look on the transom clamp bracket or steering swivel for the model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eReading the model code: the base code indicates output (10HP) and 2‑Stroke; suffix letters typically denote shaft length (S = short, L = long) and start\/control type (manual vs. electric if equipped).\u003c\/li\u003e\n    \u003cli\u003eYear\/region variations: small 10HP 2‑Stroke models may vary by market; rely on the exact model\/serial to confirm parts.\u003c\/li\u003e\n    \u003cli\u003e2‑Stroke identifiers: no crankcase oil fill (premix or oil‑injection system), lighter weight, and a simple carbureted intake.\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\u003ePortable 2‑Stroke Platform (10HP class)\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;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eLightweight, carbureted 2‑Stroke, typically a twin‑cylinder portable outboard.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e10HP 2‑Stroke portable series in short and long shaft variants; manual start is common, with select models offering electric start and remote control options depending on market.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eSimple service, easy to transport, strong low‑to‑mid range for tenders and small boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eConfirm props and gearcase parts by shaft length and spline; follow the manual for premix ratio or oil‑injection service where equipped; replace the water pump impeller on a regular schedule.\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; always follow the service schedule and procedures in your official Tohatsu manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;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;border-bottom:1px solid #f0f0f0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eCheck for water intrusion (milky oil) and metal shavings; replace sealing washers.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect 50 hours; replace annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eCheck gap and heat range per manual; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\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;border-bottom:1px solid #f0f0f0;\"\u003eInline fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect 50 hours; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eReplace if debris or ethanol gum is present; consider water‑separating filter upstream.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\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;border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 2–3 seasons (sooner in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eRestore cooling performance; renew key, plate, cup, and gaskets as needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-water-pump-repair-kits\"\u003eTohatsu Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eAnodes (external \u0026amp; internal)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eUse the correct alloy for your water (zinc\/aluminum\/magnesium).\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\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;border-bottom:1px solid #f0f0f0;\"\u003eFuel\/oil premix or oil‑injection check\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eEach use; inspect seasonally\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eUse TC‑W3 oil at the ratio specified in the manual (often 50:1 for premix). Inspect lines and pump if oil‑injected.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003ePropeller \u0026amp; hardware\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect each trip; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eCheck for bent blades, spun hub, and cotter pin condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eLower unit seal kit (if water in oil)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eAs needed after diagnosis\/pressure test\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eReplace driveshaft, prop shaft, and shift seals after confirming leak source.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eCarburetor cleaning\/rebuild\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eAs needed for rough running or storage varnish\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eClean jets and passages; replace gaskets\/needle \u0026amp; seat if necessary.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetor\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\u003eCooling system service – \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-water-pump-repair-kits\"\u003eTohatsu Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase seals \u0026amp; hardware – \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel system \u0026amp; filtration – \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \u0026amp; tune‑up – \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark plug\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropellers \u0026amp; hubs – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\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\u003eAll Tohatsu categories – \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Outboard Parts\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:1000px;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;border-bottom:1px solid #f0f0f0;\"\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screens for blockage; verify impeller condition; check thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump kit, impeller, intake screen, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eConfirm fresh fuel and correct premix; inspect fuel filter and venting; check propeller for damage or incorrect pitch.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eFuel filter, carburetor kit, spark plugs, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003ePrime the bulb; verify choke\/enrichment; check plug gap and condition; look for air leaks in fuel lines.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, carburetor kit, fuel lines, inline filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eVerify correct oil ratio and quality; ensure engine is fully warmed; check for stuck choke.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, carb clean components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eDrain and inspect oil; check for water ingress; perform pressure\/vacuum test of lower unit.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 8px;border-bottom:1px solid #f0f0f0;\"\u003eLower unit seal kit, shims\/bearings\/gears (after diagnosis)\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 10HP platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome items interchange across portable 2‑Stroke Tohatsu models, but many parts (propeller, ignition, carburetor jets, gearcase seals) depend on the exact model code, shaft length, and market. Always verify with the model\/serial.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect yearly and replace every 2–3 seasons, or sooner if water flow weakens, you operate in sandy\/silty water, or the engine overheats. A full kit is recommended if wear is visible on the cup, plate, or seals.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eEvery 100 hours or at least once per season. If the oil looks milky, smells burnt, or shows metal debris, service the gearcase and inspect seals before further use.\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 exact model code, serial number, shaft length (S\/L), start\/control type (manual\/electric, tiller\/remote), and the country\/region of sale.\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 parts? Browse our main Tohatsu collection and use the filters to narrow by horsepower, year, and model.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a6;border-radius:6px;text-decoration:none;\"\u003eShop Tohatsu Outboard Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n  \u003cp style=\"font-size:0.95em;color:#444;\"\u003eIf you’re unsure about your model, send us a clear 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":"hydrofoil-stabilizer-fits-outboard-motors-5-150-hp-replaces-seasierra-fo2001-uanofcn-fo2001","title":"Hydrofoil Stabilizer – Fits Outboard Motors 5-150 HP (Replaces SeaSierra FO2001, UanofCn FO2001)","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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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 dorsal fin style \u003cstrong\u003eHydrofoil Stabilizer\u003c\/strong\u003e is designed for outboard motors and stern drives from 5 to 150 HP. By mounting to the anti-ventilation plate, it helps boats get on plane faster, reduces bow rise and porpoising, and can significantly improve fuel efficiency at cruising speeds. It offers a universal fit for a wide range of Yamaha, Mercury, Honda, Suzuki, Tohatsu, Johnson, and Evinrude models.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for SeaSierra FO2001, UanofCn FO2001, QuickMarine HS001, and other equivalents.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls directly to the anti-ventilation plate with included bolt-on hardware.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable, marine-grade reinforced PA66 nylon plastic.\u003c\/li\u003e\n\u003cli\u003eThe kit includes all necessary stainless steel mounting hardware for a complete installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket brands.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSeaSierra\u003c\/td\u003e\n        \u003ctd\u003eFO2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eUanofCn\u003c\/td\u003e\n        \u003ctd\u003eFO2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eQuickMarine\u003c\/td\u003e\n        \u003ctd\u003eHS001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eXingrong\u003c\/td\u003e\n        \u003ctd\u003eHS001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNorthBoat\u003c\/td\u003e\n        \u003ctd\u003eHS001\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 your engine model and horsepower in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003eOEM Part 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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSuzuki\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eEvinrude\u003c\/td\u003e\n        \u003ctd\u003eOutboards\u003c\/td\u003e\n        \u003ctd\u003e5–150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n       \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eStern Drives\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eOMC\u003c\/td\u003e\n        \u003ctd\u003eStern Drives\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket\u003c\/td\u003e\n        \u003ctd\u003eUniversal fit\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\u003eHydrofoil Stabilizer \/ Planing Aid\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eMounts to anti-ventilation plate with included hardware\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eGasoline\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eBolt-on with supplied hardware\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMarine Grade Reinforced PA66 Nylon Plastic\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack (Yellow, Blue, Gray, White variants available)\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e10-1\/4\" × 8-1\/4\" (260.4 mm × 209.6 mm)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e2.41 pounds (1.09 kg)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eUniversal fit for outboard motors and stern drives\u003c\/dd\u003e\n  \u003cdt\u003eThread Size\u003c\/dt\u003e\n\u003cdd\u003eIncludes stainless steel mounting hardware\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eDorsal fin style design with enhanced wing surface area\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Hydrofoil Stabilizer\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Sets of Stainless Steel Mounting Hardware (bolts and nuts)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e1 x Installation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the engine is off and the boat is securely trailered or on a lift.\u003c\/li\u003e\n  \u003cli\u003ePlace the hydrofoil on the anti-ventilation plate, ensuring it is centered.\u003c\/li\u003e\n  \u003cli\u003eMark the drilling-hole locations on the plate through the mounting holes of the hydrofoil.\u003c\/li\u003e\n  \u003cli\u003eRemove the hydrofoil and drill the marked holes using an appropriately sized drill bit.\u003c\/li\u003e\n  \u003cli\u003ePlace the hydrofoil back onto the plate, aligning the holes.\u003c\/li\u003e\n  \u003cli\u003eInsert the stainless steel bolts from the top and attach the nuts from the bottom.\u003c\/li\u003e\n  \u003cli\u003eTighten the hardware securely, but do not overtighten to avoid cracking the plate.\u003c\/li\u003e\n  \u003cli\u003eCheck for a firm fit with no movement. The installation is now complete.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit my specific XYZ HP motor?\u003c\/summary\u003e\n  \u003cp\u003eThis hydrofoil is designed for universal fitment on most outboard motors and stern drives in the 5 to 150 HP range. It is compatible with major brands like Yamaha, Mercury, Honda, and more. Always verify your anti-ventilation plate dimensions against the product specs (10-1\/4\" × 8-1\/4\") to ensure proper mounting.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the main benefit of the dorsal fin style?\u003c\/summary\u003e\n  \u003cp\u003eThe dorsal fin design helps to reduce or eliminate cavitation by channeling water flow more effectively over the propeller. This improves tracking and stability, especially during turns, complementing the lift provided by the hydrofoil wings.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan this hydrofoil reduce porpoising?\u003c\/summary\u003e\n  \u003cp\u003eYes, one of the primary functions of a hydrofoil is to combat porpoising (the rhythmic bouncing of the bow). By providing stern lift, it keeps the bow down and forces the hull to maintain a more consistent and stable attitude in the water.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need to drill holes in my engine?\u003c\/summary\u003e\n  \u003cp\u003eYes, installation requires drilling four holes into the anti-ventilation (cavitation) plate of your outboard motor or stern drive. The package includes all necessary mounting hardware.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this affect my boat's top speed?\u003c\/summary\u003e\n  \u003cp\u003eHydrofoils can slightly reduce top-end speed by a small margin (typically 1-2 MPH) due to increased drag. However, this is often offset by significant gains in hole shot, low-speed planing ability, and improved fuel economy at cruising speeds.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I check the mounting hardware?\u003c\/summary\u003e\n  \u003cp\u003eIt is good practice to inspect the mounting bolts and nuts as part of your regular pre-launch checklist, especially after the first few uses to ensure they remain tight. Check for tightness and signs of corrosion at least once per season.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907124539,"sku":"19HS001FO2001","price":32.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/19HS001FO2001.png?v=1762938111"},{"product_id":"hydrofoil-stabilizer-fits-outboard-and-stern-drive-motors-5-150-hp-replaces-seasierra-fo2001-uanofcn-fo2001","title":"Hydrofoil Stabilizer – Fits Outboard and Stern Drive Motors 5–150 HP (Replaces SeaSierra FO2001, UanofCn FO2001)","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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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 SeaSierra \u003cstrong\u003eHydrofoil Stabilizer\u003c\/strong\u003e is designed for outboard and stern drive motors ranging from 5 to 150 HP. It enhances performance by improving planing, stability, and fuel efficiency. It is compatible with a wide array of engines including Mercury, Johnson, Evinrude, Yamaha, Honda, Suzuki, and Tohatsu (both 2-stroke and 4-stroke models).\u003c\/p\u003e\n\u003cp\u003eThis part serves as a direct replacement for SeaSierra FO2001 and UanofCn FO2001 references.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eInstallation Method: Transom Mount (Drilling Required)\u003c\/li\u003e\n    \u003cli\u003eHousing Material: UV-Resistant Reinforced Nylon PA66 Plastic\u003c\/li\u003e\n    \u003cli\u003eIncluded Hardware: Comes with stainless steel mounting screws, nuts, and a drill bit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSeaSierra\u003c\/td\u003e\n        \u003ctd\u003eFO2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eUanofCn\u003c\/td\u003e\n        \u003ctd\u003eFO2001\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 your engine model\/year in the table below.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eHP Range\u003c\/th\u003e\n        \u003cth\u003eEngine Type\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\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eEvinrude\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSuzuki\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003e5-150 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke, 4-Stroke\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercruiser\u003c\/td\u003e\n        \u003ctd\u003e-\u003c\/td\u003e\n        \u003ctd\u003eStern Drives\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC\u003c\/td\u003e\n        \u003ctd\u003e-\u003c\/td\u003e\n        \u003ctd\u003eStern Drives\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\u003eHydrofoil Stabilizer\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eTransom Mount\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMarine Grade Nylon PA66 Plastic\u003c\/dd\u003e\n  \u003cdt\u003eAvailable Colors\u003c\/dt\u003e\n\u003cdd\u003eBlue, Black, Gray, Yellow, White\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eH: 10-1\/4 inches (260 mm), W: 8-1\/4 inches (210 mm)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e2.4 pounds (1.09 kg)\u003c\/dd\u003e\n  \u003cdt\u003eMaximum Horsepower\u003c\/dt\u003e\n\u003cdd\u003e150 HP\u003c\/dd\u003e\n  \u003cdt\u003eCompatible Engine Type\u003c\/dt\u003e\n\u003cdd\u003e2-Stroke, 4-Stroke\u003c\/dd\u003e\n  \u003cdt\u003ePackage Dimensions\u003c\/dt\u003e\n\u003cdd\u003e14.09 × 8.78 × 1.34 inches (358 × 223 × 34 mm)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e1 x Hydrofoil Stabilizer (FO2001)\u003c\/li\u003e\n    \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Sets Stainless Steel Screws and Nuts\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 x 6.5mm Drill Bit\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e1 x Installation Instruction\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eDisconnect the engine's battery for safety before starting work.\u003c\/li\u003e\n    \u003cli\u003eCenter the hydrofoil on top of the anti-cavitation plate of your outboard or stern drive. Ensure it is positioned correctly according to the manufacturer's instructions for optimal performance.\u003c\/li\u003e\n    \u003cli\u003eWith the hydrofoil held firmly in place, use a marker to mark the drilling locations through the mounting holes.\u003c\/li\u003e\n    \u003cli\u003eRemove the hydrofoil and carefully drill the marked holes using the included 6.5mm drill bit.\u003c\/li\u003e\n    \u003cli\u003ePlace the hydrofoil back onto the plate, aligning the holes. Insert the stainless steel screws and fasten them securely with the provided nuts.\u003c\/li\u003e\n    \u003cli\u003eTighten all bolts evenly, but do not over-tighten, as this could damage the plate or the hydrofoil. Check for a snug and secure fit.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the main benefits of installing a hydrofoil?\u003c\/summary\u003e\n  \u003cp\u003eA hydrofoil helps your boat get on plane faster, especially with heavier loads. It also improves stability, reduces porpoising (bow bouncing), and can enhance fuel efficiency by allowing the boat to stay on plane at lower RPMs.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit my specific engine model?\u003c\/summary\u003e\n  \u003cp\u003eThis hydrofoil is designed for universal fit on most outboard and stern drive motors from 5 to 150 HP. The key is to ensure your engine's anti-cavitation plate is large enough to accommodate the hydrofoil's dimensions (10-1\/4\" x 8-1\/4\"). Always measure your plate before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs drilling into my engine's cavitation plate required?\u003c\/summary\u003e\n  \u003cp\u003eYes, installation requires drilling four holes into the anti-cavitation plate. All necessary stainless steel mounting hardware and a drill bit are included in the package to complete the installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are signs that my old hydrofoil might need replacement?\u003c\/summary\u003e\n  \u003cp\u003eInspect your current hydrofoil for cracks, warping, or significant damage, especially around the mounting points. A compromised hydrofoil can reduce performance or break off, so it's best to replace it if you notice any structural issues.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan this hydrofoil cause any negative effects on my boat?\u003c\/summary\u003e\n  \u003cp\u003eWhen installed correctly on a compatible motor, a hydrofoil should improve performance. However, incorrect installation or using it on an overpowered engine can potentially affect handling. It's crucial to follow instructions and use it within the 150 HP limit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003ePro-Grade Standards\u003c\/b\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eFast Global Fulfillment\u003c\/b\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eManufacturer-Direct Value\u003c\/b\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907157307,"sku":"SS-19HS001-B","price":28.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/SS-19HS001-B.png?v=1762938112"},{"product_id":"water-pump-impeller-fits-tohatsu-nissan-9-9hp-20hp-replaces-334-65021-0-47-803748-19210-935-003-5040046","title":"Water Pump Impeller – Fits Tohatsu \u0026 Nissan 9.9HP-20HP (Replaces 334-65021-0, 47-803748, 19210-935-003, 5040046)","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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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 aftermarket \u003cstrong\u003eWater Pump Impeller – Fits Tohatsu \u0026amp; Nissan 9.9HP-20HP\u003c\/strong\u003e is designed for reliable performance in 2-stroke and 4-stroke outboard motors. It serves as a crucial component for engine cooling, fitting a wide range of Tohatsu models (M9.9, M12, M15, M18, MFS9.9, MFS15, MFS18, MFS20) and Nissan outboards (NS9.9, NS15, NS18, NSF9.9, NSF15, NSF18, NSF20).\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct interchange for several OEM and aftermarket part numbers, including Tohatsu 334-65021-0, Nissan 334-65021-0, Mercury 47-803748, Honda 19210-935-003, Evinrude 5040046, and Sierra 18-8921.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Installs as a direct replacement for the original part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Engineered with a plastic hub for saltwater use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInclusions:\u003c\/strong\u003e Includes one high-quality water pump impeller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e334-65021-0 \/ 334650210 \/ 334650210M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003e334-65021-0 \/ 334650210 \/ 334650210M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e47-803748 \/ 8M0214944\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003e19210-935-003\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude\u003c\/td\u003e\n\u003ctd\u003e5040046\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-8921\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 your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eThis impeller is known to fit the following Tohatsu 2-stroke and 4-stroke outboard models.\u003c\/p\u003e\n\u003cp\u003eIt is also compatible with the listed Nissan 2-stroke and 4-stroke outboard models.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Compatible Engine Models\"\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\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eM18\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS18\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNS18\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF18\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e334-65021-0\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 Impeller\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect Replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eGasoline\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePlastic Hub\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eOverall Diameter: 41.11mm, Height: 23.51mm, Internal Shaft Insert Diameter: 13.88mm\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e12g (0.42oz)\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e8\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eFor saltwater use\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 Water Pump Impeller (334-65021-0)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and remove the engine cover before starting.\u003c\/li\u003e\n  \u003cli\u003eLocate and unbolt the lower unit (gearcase) from the engine's midsection and carefully lower it.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump housing bolts and lift the housing to expose the old impeller.\u003c\/li\u003e\n  \u003cli\u003eTake note of the blade direction of the old impeller before removing it from the driveshaft.\u003c\/li\u003e\n  \u003cli\u003eClean the interior of the water pump housing and inspect the wear plate for scoring or damage.\u003c\/li\u003e\n  \u003cli\u003eSlide the new impeller onto the driveshaft. Turn the driveshaft clockwise while pressing down to correctly seat the blades inside the housing cup.\u003c\/li\u003e\n  \u003cli\u003eReinstall the water pump housing, ensuring any gaskets are properly aligned.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit to the engine, refill the gear oil, and secure all bolts.\u003c\/li\u003e\n  \u003cli\u003eOnce assembled, test the engine in water to confirm a steady stream from the cooling system's tell-tale port.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this impeller fits my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eThe best way to confirm fitment is to match your original part number to the references in our Part Number Matrix. You can also check your model against the Engine \u0026amp; Model Compatibility table. If you are still unsure, please check the images and specifications against your old part 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 non-existent water stream from the engine's tell-tale port, engine overheating alarms, or a noticeable decrease in engine performance. A visual inspection may show cracked, stiff, or broken blades.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace my outboard's impeller?\u003c\/summary\u003e\n  \u003cp\u003eAs a general maintenance rule, it is recommended to replace the water pump impeller every 1-2 years or every 100-200 hours of use, whichever comes first. This interval may be shorter if you frequently operate in sandy, silty, or saltwater conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907353915,"sku":"jzf12111107","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/jzf12111107.png?v=1762938121"},{"product_id":"fuel-pump-fits-mercury-mariner-tohatsu-nissan-9-9-30-hp-johnson-evinrude-15-hp-replaces-803529t04-3h8-04000-1","title":"Fuel Pump – Fits Mercury\/Mariner\/Tohatsu\/Nissan 9.9-30 HP \u0026 Johnson\/Evinrude 15 HP (Replaces 803529T04, 3H8-04000-1)","description":"\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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis pulse-driven mechanical \u003cstrong\u003eFuel Pump\u003c\/strong\u003e is designed for a wide range of outboard motors, including Mercury\/Mariner 9.9–30 HP 4-Stroke models (2005–present), Tohatsu\/Nissan 9.9–30 HP 4-Stroke models (2002–2018), and select Johnson\/Evinrude 15 HP 2-Stroke models.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct cross-reference for Mercury part numbers 803529T04 and 803529A04, Tohatsu\/Nissan 3H8-04000-1, and Johnson\/Evinrude 5041064.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFeatures a simple two-bolt mounting system for straightforward installation.\u003c\/li\u003e\n\u003cli\u003eConstructed with a corrosion-resistant metal and plastic housing to withstand demanding marine environments.\u003c\/li\u003e\n\u003cli\u003eIncludes a new O-ring and spring clamps for a complete seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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\u003eNotes\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\u003e803529A04\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by 803529T04.\u003c\/td\u003e\n      \u003c\/tr\u003e\n        \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e803529T04\u003c\/td\u003e\n        \u003ctd\u003ePrimary replacement number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu \/ Nissan\u003c\/td\u003e\n        \u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n        \u003ctd\u003eInterchangeable with 3H8040001 and 3H8040001M.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson \/ Evinrude\u003c\/td\u003e\n        \u003ctd\u003e5041064\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\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor Mercury\/Mariner:\u003c\/strong\u003e This pump fits a wide range of 4-stroke models from 9.9 to 30 HP built from 2005 to present. As model-specific data is broad, please verify the part number 803529T04 matches your service manual.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor Tohatsu\/Nissan:\u003c\/strong\u003e Extensive compatibility with Tohatsu and Nissan 4-stroke engines from 9.9 to 30 HP. Check your specific model and year against the list below to ensure a correct fit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor Johnson\/Evinrude:\u003c\/strong\u003e Compatibility is limited to certain 15 HP 2-stroke models. It is critical to confirm that OEM part number 5041064 is the correct reference for your engine before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part 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\u003c\/td\u003e\n\u003ctd\u003eVarious 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–Present\u003c\/td\u003e\n\u003ctd\u003e803529T04\u003c\/td\u003e\n\u003ctd\u003eReplaces 803529A04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eVarious 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–Present\u003c\/td\u003e\n\u003ctd\u003e803529T04\u003c\/td\u003e\n\u003ctd\u003eReplaces 803529A04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eVarious 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–Present\u003c\/td\u003e\n\u003ctd\u003e803529T04\u003c\/td\u003e\n\u003ctd\u003eReplaces 803529A04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eVarious 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–Present\u003c\/td\u003e\n\u003ctd\u003e803529T04\u003c\/td\u003e\n\u003ctd\u003eReplaces 803529A04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eVarious 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–Present\u003c\/td\u003e\n\u003ctd\u003e803529T04\u003c\/td\u003e\n\u003ctd\u003eReplaces 803529A04\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS9.9E EFI\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2017–2018\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS9.9B, MFS9.9B2\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2004\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS15E EFI\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2017–2018\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS15B, MFS15B2, MFS15C\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2012\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS20E EFI\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2017–2018\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS20C, MFS20D\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2011–2016\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS25A\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2005\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS25B\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2006–2014\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump, Fuel Rail \u0026amp; Vapor Separator\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS25C\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2015–2018\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel System\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS30A\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2005\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS30B\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2014\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump, Fuel Rail \u0026amp; Vapor Separator\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eMFS30C\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2015–2018\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel System\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF9.9B, NSF9.9B2\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2004\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF15B, NSF15B2, NSF15C\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2013\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF20C\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2008\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF25A\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2005\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF25B\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2006–2014\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump, Fuel Rail \u0026amp; Vapor Separator\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF30A\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2005\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eInlet Manifold, Fuel Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNissan\u003c\/td\u003e\n\u003ctd\u003eNSF30B\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2014\u003c\/td\u003e\n\u003ctd\u003e3H8-04000-1\u003c\/td\u003e\n\u003ctd\u003eFuel Pump, Fuel Rail \u0026amp; Vapor Separator\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003eVarious Models\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993–2007\u003c\/td\u003e\n\u003ctd\u003e5041064\u003c\/td\u003e\n\u003ctd\u003eLimited compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude\u003c\/td\u003e\n\u003ctd\u003eVarious Models\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1993–2007\u003c\/td\u003e\n\u003ctd\u003e5041064\u003c\/td\u003e\n\u003ctd\u003eLimited compatibility\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eMechanical Fuel Pump\u003c\/dd\u003e\n  \u003cdt\u003eDrive System\u003c\/dt\u003e\n\u003cdd\u003ePulse-Driven\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eTwo-bolt mounting system\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eGasoline\u003c\/dd\u003e\n  \u003cdt\u003eConnection Type\u003c\/dt\u003e\n\u003cdd\u003eHose barb fittings\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eCorrosion-resistant metal and plastic\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\/Silver\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eApproximately 89 × 76 × 38 mm (3.5 × 3.0 × 1.5 inches)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003eApproximately 0.07 kg (0.15 lbs)\u003c\/dd\u003e\n  \u003cdt\u003eWorking Pressure\u003c\/dt\u003e\n\u003cdd\u003eMeets OEM specifications\u003c\/dd\u003e\n  \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n\u003cdd\u003e-20 to 80°C (-4 to 176°F)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Fuel Pump Assembly\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 x O-Ring\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e2 x Metal Spring Clamps\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAlways work in a well-ventilated area and disconnect the negative battery terminal before starting.\u003c\/li\u003e\n  \u003cli\u003eRelieve fuel system pressure according to your service manual and place rags to catch any fuel spills.\u003c\/li\u003e\n  \u003cli\u003eCarefully disconnect the fuel inlet, outlet, and pulse hoses from the old pump.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old pump assembly and its gasket or O-ring.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the mounting surface on the engine block to ensure a proper seal.\u003c\/li\u003e\n  \u003cli\u003ePosition the new pump with its O-ring, then install and tighten the mounting bolts to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eSecurely reconnect all hoses using the new spring clamps provided.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery, prime the fuel system as needed, and start the engine. Carefully inspect the pump and all connections for any leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a failing fuel pump?\u003c\/summary\u003e\n  \u003cp\u003eSymptoms include engine hesitation or stumbling, especially at high speeds, difficulty starting, rough idling, or a complete failure to start. A visual inspection may also reveal fuel leaking from the pump housing or connected lines.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow can I be sure this fits my Mercury\/Mariner engine?\u003c\/summary\u003e\n  \u003cp\u003eBecause Mercury uses this pump across many models, the best way to confirm fitment is by matching your old part number to 803529T04. While it fits most 9.9–30 HP 4-stroke models from 2005-present, checking the part number is the only way to guarantee compatibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhy is Johnson\/Evinrude compatibility listed as \"limited\"?\u003c\/summary\u003e\n  \u003cp\u003eThis pump only fits specific Johnson\/Evinrude 15 HP 2-stroke models that use OEM part number 5041064. Its primary design is for 4-stroke applications, so you must confirm this exact part number for a 2-stroke engine before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this fuel pump compatible with ethanol-blended fuels?\u003c\/summary\u003e\n  \u003cp\u003eYes, this aftermarket pump is built with materials designed to handle standard ethanol-blended gasoline (up to E10). Using fuels with higher ethanol concentrations is not recommended and may reduce the service life of the pump and other fuel system components.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is a \"pulse-driven\" pump?\u003c\/summary\u003e\n  \u003cp\u003eA pulse-driven mechanical pump uses the changing pressure within the engine's crankcase to operate. As the piston moves, the pressure fluctuation moves a diaphragm inside the pump, which draws fuel from the tank and sends it to the carburetor without needing any electrical power.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907878203,"sku":"QM-FP24095","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/QM-FP24095.png?v=1762938134"},{"product_id":"water-pump-impeller-fits-tohatsu-nissan-9-9-20-hp-mercury-8-20-hp-replaces-334-65021-0-47-803748","title":"Water Pump Impeller – Fits Tohatsu\/Nissan 9.9–20 HP \u0026 Mercury 8–20 HP (Replaces 334-65021-0, 47-803748)","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;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\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 Impeller – Fits Tohatsu\/Nissan 9.9–20 HP \u0026amp; Mercury 8–20 HP (Replaces 334-65021-0, 47-803748)\u003c\/strong\u003e is a critical component for maintaining your engine's cooling system. It is designed for Tohatsu\/Nissan 9.9-20 HP (2-Stroke \u0026amp; 4-Stroke), Mercury\/Mariner 8-20 HP (4-Stroke), and is cross-compatible with select Honda 7.5-10 HP outboard motors.\u003c\/p\u003e\n\u003cp\u003eThis part provides a direct interchange for OEM part numbers Tohatsu 334-65021-0, Mercury 47-803748\/8M0214944, Honda 19210-935-003, Evinrude 5040046, and Sierra 18-8921.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls as a direct OEM-equivalent replacement.\u003c\/li\u003e\n\u003cli\u003eFeatures a key-driven shaft mount for secure fitting.\u003c\/li\u003e\n\u003cli\u003eMade from salt water resistant rubber for durability in marine environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\/Nissan\u003c\/td\u003e\n        \u003ctd\u003e334-65021-0 \/ 334650210 \/ 334650210M\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e47-803748 \/ 8M0214944\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003e19210-935-003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEvinrude\u003c\/td\u003e\n        \u003ctd\u003e5040046\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-8921\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 your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFits a range of Tohatsu \u0026amp; Nissan 2-stroke and 4-stroke outboard models from 9.9 HP to 20 HP.\u003c\/p\u003e\n\u003cp\u003eDesigned for Mercury \u0026amp; Mariner 4-stroke outboards from 8 HP to 20 HP, including Bigfoot gearcase models.\u003c\/p\u003e\n\u003cp\u003eCross-compatible with specific Honda and Evinrude models as listed.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003eOEM Part 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\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eMFS9.9\/15\/18\/20\u003c\/td\u003e\n        \u003ctd\u003e9.9-20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e334-65021-0\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNSF9.9\/15\/18\/20\u003c\/td\u003e\n        \u003ctd\u003e9.9-20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e334-65021-0\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eM9.9\/15\/18\/20\u003c\/td\u003e\n        \u003ctd\u003e9.9-20\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e334-65021-0\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eNS9.9\/15\/18\/20\u003c\/td\u003e\n        \u003ctd\u003e9.9-20\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e334-65021-0\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eF8\/F9.9\/F10\/F15\/F18\/F20\u003c\/td\u003e\n        \u003ctd\u003e8-20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e47-803748\u003c\/td\u003e\n        \u003ctd\u003eAlso fits Bigfoot gearcase models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury Marine\u003c\/td\u003e\n        \u003ctd\u003e8M0135803\u003c\/td\u003e\n        \u003ctd\u003e9.9-20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e8M0214944\u003c\/td\u003e\n        \u003ctd\u003eService kit part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eBF7.5\/BF10\u003c\/td\u003e\n        \u003ctd\u003e7.5-10\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e19210-935-003\u003c\/td\u003e\n        \u003ctd\u003eCross-compatible\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEvinrude\u003c\/td\u003e\n        \u003ctd\u003eE15\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e5040046\u003c\/td\u003e\n        \u003ctd\u003eCross-compatible\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 Impeller\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM Replacement\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eKey-driven Shaft Mount\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eHigh-quality Rubber\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eShaft Mount with Key\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eSalt water resistant\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water Pump Impeller (334-65021-0\/47-803748)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the spark plug wires and battery cables for safety.\u003c\/li\u003e\n  \u003cli\u003ePlace a drain pan under the gearcase and remove the drain plug to empty the gear oil.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and carefully lower the gearcase (lower unit) from the outboard's main housing.\u003c\/li\u003e\n  \u003cli\u003eLocate the water pump housing on top of the gearcase and remove its retaining bolts.\u003c\/li\u003e\n  \u003cli\u003eSlide the housing up and off the driveshaft to expose the old impeller. Note the orientation of the vanes.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller and key. Clean any debris or corrosion from the housing and wear plate.\u003c\/li\u003e\n  \u003cli\u003eInstall the new key and slide the new impeller onto the driveshaft. Rotate the shaft clockwise while pushing down to seat the vanes correctly.\u003c\/li\u003e\n  \u003cli\u003eApply a light coat of marine grease to the inside of the housing and reinstall it.\u003c\/li\u003e\n  \u003cli\u003eRe-bolt the water pump housing to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eReattach the gearcase to the outboard, ensuring the driveshaft, shift shaft, and water tube align correctly.\u003c\/li\u003e\n  \u003cli\u003eRefill the gearcase with new lubricant and start the engine in water to verify proper water flow from the tell-tale outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know when to replace my water pump impeller?\u003c\/summary\u003e\n  \u003cp\u003eSigns of a failing impeller include a weak or intermittent water stream from the \"tell-tale\" outlet, engine overheating alarms, or a noticeable drop in cooling performance. It's recommended to replace it as part of regular annual service, or every 100-200 hours of use, whichever comes first.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the symptoms of complete impeller failure?\u003c\/summary\u003e\n  \u003cp\u003eComplete failure will result in a total loss of cooling water flow, leading to rapid engine overheating, which can cause severe and permanent damage. You will likely get an overheat warning on your console or engine management system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this impeller compatible with both 2-stroke and 4-stroke engines?\u003c\/summary\u003e\n  \u003cp\u003eYes, as specified in the compatibility table, this impeller fits a range of both 2-stroke and 4-stroke models from Tohatsu and Nissan, and 4-stroke models from Mercury\/Mariner and Honda.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this myself?\u003c\/summary\u003e\n  \u003cp\u003eWhile DIY installation is possible for those with mechanical experience, it involves removing the lower unit of your outboard. We recommend professional installation to ensure correct seating of the impeller, proper alignment of shafts, and to prevent damage to the engine.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eMy engine model is listed, but the year is not. Will it fit?\u003c\/summary\u003e\n  \u003cp\u003eThis part is listed by engine model and horsepower range. While specific year ranges are not provided, it is designed to fit the models listed. Always compare the photos and part numbers to your existing impeller to be certain. When in doubt, consult a professional mechanic.\u003c\/p\u003e´\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between this and an OEM impeller?\u003c\/summary\u003e\n  \u003cp\u003eThis is an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is engineered to meet or exceed OEM specifications for fit, form, and function, using high-quality, salt-water resistant rubber for reliable performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow fast is shipping, and what is the cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order number. Returns are accepted within our standard return window for items that are unused and in their original packaging.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717907976507,"sku":"24KM103-QM","price":18.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KM103-QM.png?v=1762938137"},{"product_id":"hydrofoil-stabilizer-fins-fits-outboard-motors-up-to-50hp-4-50-hp-replaces-five-oceans-fo-4470-se-sport-300","title":"Hydrofoil Stabilizer Fins – Fits Outboard Motors Up to 50HP (4-50 HP) (Replaces Five Oceans FO-4470, SE Sport 300)","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\u003eThese \u003cstrong\u003eHydrofoil Stabilizer Fins\u003c\/strong\u003e are designed to improve performance and stability for outboard motors ranging from 4 to 50 HP. Suitable for a wide variety of brands including Mercury, Yamaha, Evinrude, and Honda, they help boats get on plane faster and stay on plane at lower speeds. The two-piece design allows each foil to flex independently, absorbing shock and providing a smoother ride.\u003c\/p\u003e\n    \u003cp\u003eThis part serves as a direct replacement for Five Oceans FO-4470 and can be used in similar applications as the SE Sport 300.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eInstalls via a simple bolt-on process directly to the anti-ventilation plate (drilling required).\u003c\/li\u003e\n        \u003cli\u003eConstructed from high-strength, UV-resistant black plastic for durability in marine environments.\u003c\/li\u003e\n        \u003cli\u003eKit includes all necessary stainless steel mounting hardware.\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 this matrix to confirm equivalent references across OEM and aftermarket.\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\u003eNotes\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eFive Oceans\u003c\/td\u003e\n                    \u003ctd\u003eFO-4470\u003c\/td\u003e\n                    \u003ctd\u003e\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSE Sport\u003c\/td\u003e\n                    \u003ctd\u003e300\u003c\/td\u003e\n                    \u003ctd\u003eFor similar applications\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\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMariner\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eYamaha\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eJohnson\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eEvinrude\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eHonda\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eTohatsu\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSuzuki\u003c\/td\u003e\n                    \u003ctd\u003eVarious\u003c\/td\u003e\n                    \u003ctd\u003e4-50 HP\u003c\/td\u003e\n                    \u003ctd\u003e2- \u0026amp; 4-Stroke\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\u003eTechnical Specs\u003c\/h2\u003e\n    \u003cdl\u003e\n        \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eOutboard Engine Hydrofoil Stabilizer Fins\u003c\/dd\u003e\n        \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eBolt-on (4 mounting holes)\u003c\/dd\u003e\n        \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect mount to anti-ventilation plate (cavitation plate)\u003c\/dd\u003e\n        \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eHigh-strength black plastic, UV-resistant\u003c\/dd\u003e\n        \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n        \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eApproximately 180mm × 180mm per fin (7.1\" × 7.1\")\u003c\/dd\u003e\n        \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003e2-piece design (left and right wings)\u003c\/dd\u003e\n        \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1-year (Five Oceans model)\u003c\/dd\u003e\n        \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eMolded in two unbreakable pieces, each foil designed to flex independently to absorb shock\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    \u003cul\u003e\n        \u003cli\u003e1 x Hydrofoil Set (Left and Right Fin)\u003c\/li\u003e\n        \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Stainless Steel Screws\u003c\/span\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Washers\u003c\/span\u003e\u003c\/li\u003e\n        \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Pressure Nuts\u003c\/span\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003eCenter the hydrofoil pieces on the anti-ventilation (cavitation) plate of your outboard motor.\u003c\/li\u003e\n        \u003cli\u003eMark the positions for the four mounting holes. Ensure they are clear of any underlying structures.\u003c\/li\u003e\n        \u003cli\u003eCarefully drill the four marked holes through the plate using an appropriately sized drill bit.\u003c\/li\u003e\n        \u003cli\u003ePlace the fins onto the plate, aligning the holes.\u003c\/li\u003e\n        \u003cli\u003eInsert the stainless steel screws with washers from the top and secure them from the bottom using the pressure nuts.\u003c\/li\u003e\n        \u003cli\u003eTighten all four nuts evenly and securely. Do not overtighten. Check for firmness before operating the vessel.\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\u003eWill these fins fit my specific outboard motor?\u003c\/summary\u003e\n        \u003cp\u003eThese hydrofoils are designed for a universal fit on most outboard motors from 4 to 50 HP. Installation requires drilling into the anti-ventilation plate. Always measure your plate to ensure the 180mm x 180mm fin dimensions will fit comfortably.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat performance benefits can I expect?\u003c\/summary\u003e\n        \u003cp\u003eHydrofoils can help reduce the time it takes to get on plane, maintain plane at lower speeds, and improve stability and tracking. Actual performance improvements vary depending on boat hull design, weight distribution, and engine mounting height.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow do these compare to the SE Sport 300?\u003c\/summary\u003e\n        \u003cp\u003eThese fins offer a similar function and universal fit for small-to-mid-size outboards. They are made from high-strength, UV-resistant plastic and feature a two-piece design that allows each wing to flex independently to absorb shock, similar to other popular models.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow often should I check the mounting hardware?\u003c\/summary\u003e\n        \u003cp\u003eIt is good practice to inspect the tightness of all mounting hardware (screws, nuts, washers) as part of your regular pre-launch checklist and at least once per season to ensure continued safe operation.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n        \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n        \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n        \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\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\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n        \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n        \u003cli\u003eProfessional installation is recommended for safety and performance.\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\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717908140347,"sku":"19HS001R1","price":25.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/19HS001R1.png?v=1762938148"}],"url":"https:\/\/seasierra.com\/collections\/tohatsu-2-stroke-10hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}