{"product_id":"hydrofoil-stabilizer-fits-outboard-sterndrive-motors-5-150-hp","title":"Hydrofoil Stabilizer – Fits Outboard \u0026 Sterndrive Motors 5-150 HP","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eHydrofoil Stabilizer\u003c\/strong\u003e is a versatile marine accessory designed for outboard and sterndrive engines ranging from 5-150 HP. Made of durable, UV-resistant reinforced PA66 nylon plastic, it ensures long-lasting performance in both saltwater and freshwater environments. Its primary function is to improve planing speed, reduce porpoising, and enhance overall boat stability for a smoother, safer ride.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct-fit alternative for similar Doel Fin style hydrofoils, offering comparable performance benefits.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls via a simple bolt-on process with included hardware.\u003c\/li\u003e\n\u003cli\u003eEngineered from marine-grade, UV-resistant reinforced PA66 plastic.\u003c\/li\u003e\n\u003cli\u003eThe kit includes stainless steel mounting hardware and a drill bit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\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        \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\u003eVarious Outboard Models\u003c\/td\u003e\n        \u003ctd\u003e5-40 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSuitable for most models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eVarious Outboard Models\u003c\/td\u003e\n        \u003ctd\u003e5-40 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eMay not fit Mercury 4-Stroke 40\/50\/60 HP models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eVarious Outboard Models\u003c\/td\u003e\n        \u003ctd\u003e5-40 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSuitable for most models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSuzuki\u003c\/td\u003e\n        \u003ctd\u003eVarious Outboard Models\u003c\/td\u003e\n        \u003ctd\u003e5-40 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSuitable for most models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eVarious Outboard Models\u003c\/td\u003e\n        \u003ctd\u003e5-40 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eSuitable for most models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVarious\u003c\/td\u003e\n        \u003ctd\u003eSterndrive\/Outdrive Units\u003c\/td\u003e\n        \u003ctd\u003eVarious\u003c\/td\u003e\n        \u003ctd\u003eVarious\u003c\/td\u003e\n        \u003ctd\u003eUniversal application for most sterndrive units\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\u003eBolt-on (hardware included)\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eReinforced Nylon PA66 Plastic (Marine Grade, UV-Resistant)\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eWhite (also available in Black, Blue, Grey, Yellow)\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eWidth: 14 inches, Height: 13.5 inches (approximate)\u003c\/dd\u003e\n  \u003cdt\u003eHardware\u003c\/dt\u003e\n\u003cdd\u003e4 sets of stainless steel screws and nuts, includes drill bit\u003c\/dd\u003e\n  \u003cdt\u003eCompatible HP Range\u003c\/dt\u003e\n\u003cdd\u003e5-40 HP (suitable for up to 150 HP on some applications)\u003c\/dd\u003e\n  \u003cdt\u003eOperating Environment\u003c\/dt\u003e\n\u003cdd\u003eMarine (saltwater\/freshwater)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eReinforced structure for enhanced durability\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 (White PA66 Plastic)\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 x Sets of 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 manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery before beginning installation.\u003c\/li\u003e\n  \u003cli\u003ePosition the hydrofoil on the engine's cavitation plate, ensuring it is centered and level.\u003c\/li\u003e\n  \u003cli\u003eUse a pencil or marker to mark the drilling locations through the mounting holes on the hydrofoil.\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 cavitation plate, aligning the holes.\u003c\/li\u003e\n  \u003cli\u003eInsert the stainless steel screws from the top and secure them with the nuts from the bottom.\u003c\/li\u003e\n  \u003cli\u003eTighten all hardware securely, but do not overtighten to avoid damaging the plate.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test the boat at low speeds to ensure proper function before regular use.\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 engine?\u003c\/summary\u003e\n  \u003cp\u003eThis hydrofoil has a universal design intended for most outboard and sterndrive motors from 5-40 HP. However, there are known exceptions, such as some Mercury 4-stroke 40\/50\/60 HP models. Always compare your cavitation plate's size and shape to the product dimensions (approx. 14\" W x 13.5\" H) to ensure a good fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the maximum horsepower this can handle?\u003c\/summary\u003e\n  \u003cp\u003eWhile a great fit for engines in the 5-40 HP range, it can be suitable for applications up to 150 HP. Performance on higher horsepower engines depends heavily on the specific boat hull, engine type, and water conditions. For engines over 40 HP, monitor performance closely.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow does this compare to a brand-name Doel Fin?\u003c\/summary\u003e\n  \u003cp\u003eThis product is designed to function similarly to a Doel Fin, offering benefits like faster planing and improved stability. It is made from high-strength, reinforced PA66 nylon plastic, which is comparable to materials used in many well-known brands and is built for durability in marine environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if it's installed and working correctly?\u003c\/summary\u003e\n  \u003cp\u003eA successful installation results in noticeable performance improvements. You should experience a shorter time to get on plane, reduced or eliminated porpoising (bow bouncing), better stability in turns, and a smoother ride in choppy water.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I have to drill holes in my engine’s cavitation plate?\u003c\/summary\u003e\n  \u003cp\u003eYes, this is a bolt-on stabilizer that requires drilling four holes in the cavitation plate. The kit includes all necessary stainless steel hardware and the correct size drill bit to complete the installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is reinforced PA66 plastic?\u003c\/summary\u003e\n  \u003cp\u003ePA66 is a type of high-performance nylon known for its exceptional strength, rigidity, and resistance to heat and chemicals. The reinforcement in our marine-grade version adds extra durability and makes it UV-resistant, preventing it from becoming brittle after sun and water exposure.\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 has been built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections 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 will 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\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its 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 and specifications against 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 quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718271177019,"sku":"HS001-White-QM","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/HS001-White-QM.png?v=1762958735","url":"https:\/\/seasierra.com\/products\/hydrofoil-stabilizer-fits-outboard-sterndrive-motors-5-150-hp","provider":"SeaSierra","version":"1.0","type":"link"}