{"product_id":"hydrofoil-stabilizer-fits-outboard-motors-stern-drives-40-300-hp-replaces-fo2003","title":"Hydrofoil Stabilizer – Fits Outboard Motors \u0026 Stern Drives 40-300 HP (Replaces FO2003)","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\u003eWhale Tail Hydrofoil Stabilizer\u003c\/strong\u003e is a versatile performance-enhancing attachment designed for a wide range of outboard motors and stern drives from 40 to 300 HP. It provides improved stability, reduced cavitation, faster planing, and better fuel efficiency for brands including Mercury, Yamaha, Johnson, Evinrude, Honda, and Suzuki, with some specific exceptions.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement for NorthBoat FO2003, SeaSierra 300, and QuickMarine or Marine Whale Tail Silver models.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation is bolted to the cavitation plate and requires drilling.\u003c\/li\u003e\n\u003cli\u003eConstructed from UV-resistant, marine-grade reinforced Nylon PA66 plastic.\u003c\/li\u003e\n\u003cli\u003eThe package includes all necessary stainless steel mounting hardware 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\u003eNorthBoat\u003c\/td\u003e\n        \u003ctd\u003eFO2003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSeaSierra\u003c\/td\u003e\n        \u003ctd\u003e300\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eQuickMarine\u003c\/td\u003e\n        \u003ctd\u003eWhale Tail Silver\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMarine\u003c\/td\u003e\n        \u003ctd\u003eWhale Tail Silver\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\u003eCompatibility\u003c\/th\u003e\n        \u003cth\u003eDetails\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCompatible With\u003c\/td\u003e\n        \u003ctd\u003e\n          \u003cul\u003e\n            \u003cli\u003eMost outboard motors and stern drives 40-300 HP\u003c\/li\u003e\n            \u003cli\u003eYamaha, Mercury, Johnson, Evinrude, Honda, Suzuki engines (40-300 HP)\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNot Compatible With\u003c\/td\u003e\n        \u003ctd\u003e\n          \u003cul\u003e\n            \u003cli\u003eMercury 4-Stroke 40 HP, 50 HP, 60 HP\u003c\/li\u003e\n            \u003cli\u003eMercury Bravo III with only one anode on bottom of cavitation plate (rare)\u003c\/li\u003e\n            \u003cli\u003eMercury Bravo II\u003c\/li\u003e\n            \u003cli\u003eVolvo with exhaust through cavitation plate\u003c\/li\u003e\n            \u003cli\u003eHonda 200 HP and higher\u003c\/li\u003e\n            \u003cli\u003eYamaha 350 HP\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \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 (Whale Tail)\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eBolted to cavitation plate; drilling required\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eMarine Grade Reinforced Nylon PA66 Plastic (UV-Resistant)\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eSilver\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eH: 13.5 inches (343mm), W: 14 inches (356mm)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e2.94 lb (1.33 kg)\u003c\/dd\u003e\n  \u003cdt\u003eMounting Type\u003c\/dt\u003e\n\u003cdd\u003eOutboard\/Sterndrive mount\u003c\/dd\u003e\n  \u003cdt\u003eEngine Compatibility\u003c\/dt\u003e\n\u003cdd\u003e40-300 HP outboards and stern drives\u003c\/dd\u003e\n  \u003cdt\u003eEngine Type\u003c\/dt\u003e\n\u003cdd\u003e2-Stroke \u0026amp; 4-Stroke\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 Board\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\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eFor safety, disconnect the engine's battery or power supply before starting.\u003c\/li\u003e\n  \u003cli\u003eCenter the hydrofoil on the top side of the anti-cavitation plate.\u003c\/li\u003e\n  \u003cli\u003eMark the four drill locations through the mounting holes in the hydrofoil.\u003c\/li\u003e\n  \u003cli\u003eRemove the hydrofoil and carefully drill the four marked holes with the included 6.5mm drill bit.\u003c\/li\u003e\n  \u003cli\u003eClean any metal shavings or burrs from the drilled holes.\u003c\/li\u003e\n  \u003cli\u003ePlace the hydrofoil back onto the plate, aligning it with the newly drilled holes.\u003c\/li\u003e\n  \u003cli\u003eInsert the stainless steel bolts from the top and secure them with the nuts from the bottom.\u003c\/li\u003e\n  \u003cli\u003eTighten all four sets of hardware securely. Check for tightness before each use.\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 hydrofoil will fit my motor?\u003c\/summary\u003e\n  \u003cp\u003eThis stabilizer fits most outboard and stern drive engines from 40 to 300 HP. Please review the \"Not Compatible With\" list to check for specific exclusions, such as certain Mercury 4-Stroke models, Mercury Bravo II\/III drives, and high-HP engines from Honda and Yamaha.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the main benefit of installing a whale tail hydrofoil?\u003c\/summary\u003e\n  \u003cp\u003eThe primary benefit is improved performance. It helps the boat get on plane much faster and stay on plane at lower speeds. This action reduces bow rise, minimizes porpoising and cavitation, and can lead to better fuel economy.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs drilling into my cavitation plate required?\u003c\/summary\u003e\n  \u003cp\u003eYes, this model requires drilling four holes into the motor's anti-cavitation plate to ensure a secure, permanent installation. The package includes all necessary mounting hardware and the correct size drill bit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are signs of an incorrect installation?\u003c\/summary\u003e\n  \u003cp\u003eSymptoms of improper installation include unusual vibrations, poor handling, or the boat pulling consistently to one side. Verify the hydrofoil is perfectly centered on the cavitation plate and that all mounting hardware is fully tightened.\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 for tightness as part of your regular pre-launch safety check.\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":50718235394363,"sku":"QM-HS002-Silver","price":63.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/QM-HS002-Silver.png?v=1762958050","url":"https:\/\/seasierra.com\/products\/hydrofoil-stabilizer-fits-outboard-motors-stern-drives-40-300-hp-replaces-fo2003","provider":"SeaSierra","version":"1.0","type":"link"}