{"product_id":"hydrofoil-stabilizer-fits-outboards-stern-drives-40-350-hp-sport-300","title":"Hydrofoil Stabilizer – Fits Outboards \u0026 Stern Drives 40-350 HP (Sport 300)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eImprove your boat's performance with the Sea Sierra \u003cstrong\u003eWhale Tail Hydrofoil Stabilizer (Sport 300)\u003c\/strong\u003e. This universal stabilizer is designed for a broad range of outboard and stern drive applications, fitting most engines from 40 to 350 HP to enhance planing, stability, and overall handling.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls via a secure bolt-on method; drilling is required.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable, marine-grade UV-resistant reinforced Nylon PA66 plastic.\u003c\/li\u003e\n\u003cli\u003ePackage includes all necessary installation hardware, including a drill bit and bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis hydrofoil offers universal fitment for most outboard motors and stern drives ranging from 40 HP to 350 HP, including both 2-stroke and 4-stroke engines. Please verify the dimensions of your engine's anti-ventilation plate to ensure proper fit before installation.\u003c\/p\u003e\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\u003eBolt-on with included hardware\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eMarine Grade UV-Resistant Reinforced Nylon PA66 Plastic\u003c\/dd\u003e\n  \u003cdt\u003eCompatibility\u003c\/dt\u003e\n\u003cdd\u003e40-350 HP Outboard Motors and Stern Drives\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eApproximately 17 inches (W) × 14.4 inches (H)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e1.76 ounces (50 grams) package weight\u003c\/dd\u003e\n  \u003cdt\u003ePackage Dimensions\u003c\/dt\u003e\n\u003cdd\u003e0.39 × 0.39 × 0.39 inches (package)\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eAvailable in multiple colors (varies by SKU)\u003c\/dd\u003e\n  \u003cdt\u003eAssembly Required\u003c\/dt\u003e\n\u003cdd\u003eNo\u003c\/dd\u003e\n  \u003cdt\u003eEngine Types\u003c\/dt\u003e\n\u003cdd\u003eCompatible with 2-Stroke \u0026amp; 4-Stroke engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation Hardware\u003c\/dt\u003e\n\u003cdd\u003eIncluded (bolts, nuts, drill bit)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Sport 300 Outboard Hydrofoil Stabilizer\u003c\/li\u003e\n\u003cli\u003e1 × Installation Instruction\u003c\/li\u003e\n\u003cli\u003e1 × Drill bit\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 × Sets of Install Bolts\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eInstallation requires drilling into the anti-ventilation plate of the lower unit. The package includes all necessary hardware and a drill bit for a straightforward installation. For boat owners who prefer a non-permanent solution, alternative clamp-on models are available that do not require drilling.\u003c\/p\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this fit my specific engine model?\u003c\/summary\u003e\u003cp\u003eThis is a universal stabilizer designed for most outboard and stern drive motors from 40 to 350 HP. We recommend measuring your engine's anti-ventilation plate to confirm it can accommodate the hydrofoil's dimensions (approx. 17\" W x 14.4\" H) before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the main benefits of using this hydrofoil?\u003c\/summary\u003e\u003cp\u003eThe Sport 300 is designed to get your boat on plane faster, improve stability and handling, maintain plane at lower speeds, and provide a smoother ride. It can also help reduce fuel consumption by minimizing porpoising and cavitation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs drilling required for installation?\u003c\/summary\u003e\u003cp\u003eYes, this model uses a bolt-on design for a secure and rigid fit, which requires drilling four small holes in your engine's anti-ventilation plate. All mounting hardware and a drill bit are included.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the hydrofoil made of?\u003c\/summary\u003e\u003cp\u003eIt is constructed from a high-strength, marine-grade reinforced Nylon PA66 plastic, which is engineered to resist UV degradation and withstand harsh aquatic environments.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat signs indicate I might need a hydrofoil?\u003c\/summary\u003e\u003cp\u003eCommon issues that a hydrofoil can solve include a bow-high attitude during acceleration, excessive \"porpoising\" (the bow bouncing up and down), and difficulty staying on plane at lower speeds. It also improves steering response and stability in turns.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\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\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\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\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":50718235263291,"sku":"20HS004","price":68.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/20HS004.png?v=1762958044","url":"https:\/\/seasierra.com\/products\/hydrofoil-stabilizer-fits-outboards-stern-drives-40-350-hp-sport-300","provider":"SeaSierra","version":"1.0","type":"link"}