{"product_id":"hydrofoil-stabilizer-fits-outboard-stern-drive-motors-40-350-hp-replaces-pmjr71b-xrmarine-sport-300","title":"Hydrofoil Stabilizer – Fits Outboard\/Stern Drive Motors 40-350 HP (Replaces PMJR71B, XRmarine Sport-300)","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 marine whale tail \u003cstrong\u003eHydrofoil Stabilizer – Fits Outboard\/Stern Drive Motors 40-350 HP (Replaces PMJR71B)\u003c\/strong\u003e is designed to improve boat handling, enhance thrust, reduce planing time, and keep boats on plane at lower speeds. It is compatible with a wide range of outboard motors and stern drives in the 40-350 HP range.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct interchange for SeaSierra PMJR71B and XRmarine Sport-300.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eInstallation Method: Bolt-on (requires drilling)\u003c\/li\u003e\n    \u003cli\u003eMounting Location: Direct mount to the engine's cavitation plate\u003c\/li\u003e\n    \u003cli\u003eMaterial: Constructed from UV-resistant, marine-grade nylon for durability\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\u003ePMJR71B\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eXRmarine\u003c\/td\u003e\n                \u003ctd\u003eSport-300\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\u003eModel Type\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\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEvinrude\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSuzuki\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eOutboard Motors\u003c\/td\u003e\n        \u003ctd\u003e40-350 HP\u003c\/td\u003e\n        \u003ctd\u003e2- \u0026amp; 4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\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\u003e\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\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo\u003c\/td\u003e\n        \u003ctd\u003eSX-A, DPS, DPR, DPH, 280, 290 series\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eRequires longer bolts and 1\" fender washers (not included)\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cem\u003eNote: Not compatible with Volvo Ocean Series XDP stern drives.\u003c\/em\u003e\u003c\/p\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 (requires drilling)\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect mount to cavitation plate\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMarine Grade Nylon PA66 Plastic\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eRed\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eH: 17 inches (431.8 mm) × W: 14.4 inches (365.8 mm)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eBolt-on with included hardware\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eUV-resistant marine-grade material\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e1 × Hydrofoil Stabilizer\u003c\/li\u003e\n    \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e4 × Sets of Stainless Steel Screws and Nuts\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan style=\"color:#d0021b;\"\u003e1 × 6.5mm Drill Bit\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e1 × 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 safely secured on a trailer or lift.\u003c\/li\u003e\n    \u003cli\u003eCenter the hydrofoil on the top side of the cavitation plate. Ensure it does not interfere with the propeller's movement.\u003c\/li\u003e\n    \u003cli\u003eMark the four drilling locations on the cavitation plate through the mounting holes of 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 on the cavitation plate, aligning it with the newly drilled holes.\u003c\/li\u003e\n    \u003cli\u003eInsert the stainless steel screws from the top and secure them from the bottom with the nuts.\u003c\/li\u003e\n    \u003cli\u003eTighten all nuts evenly and firmly. Do not overtighten to avoid damaging the cavitation plate.\u003c\/li\u003e\n    \u003cli\u003eBefore launching, double-check that the hydrofoil is secure and does not obstruct any moving parts.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this hydrofoil fit my specific motor model?\u003c\/summary\u003e\u003cp\u003eThis hydrofoil features a universal design for most outboard and stern drive motors in the 40-350 HP range. To ensure a proper fit, measure your engine's cavitation plate and compare it with the hydrofoil's dimensions of 17 inches by 14.4 inches to confirm adequate clearance and surface area.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs drilling into my engine's cavitation plate required?\u003c\/summary\u003e\u003cp\u003eYes, this is a bolt-on stabilizer that requires drilling four holes in the cavitation plate for a secure and permanent installation. This method provides the most stable and effective connection. All necessary mounting hardware, including a drill bit, is included.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat performance benefits should I expect?\u003c\/summary\u003e\u003cp\u003eProperly installed, the hydrofoil will help your boat get on plane faster, which reduces bow rise and improves visibility. It also allows the boat to stay on plane at lower speeds, leading to improved fuel economy, and can enhance stability and reduce porpoising or chine walking.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does this compare to a factory-installed stabilizer?\u003c\/summary\u003e\u003cp\u003eThis aftermarket hydrofoil is designed to offer performance benefits similar to or exceeding those of OEM options. It is engineered from durable, UV-resistant materials to withstand the marine environment and provides a cost-effective way to improve your boat's handling and efficiency.\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\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\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718234935611,"sku":"SS-20HS002-R","price":140.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/SS-20HS002-R.png?v=1762958026","url":"https:\/\/seasierra.com\/products\/hydrofoil-stabilizer-fits-outboard-stern-drive-motors-40-350-hp-replaces-pmjr71b-xrmarine-sport-300","provider":"SeaSierra","version":"1.0","type":"link"}