{"title":"Generic 4-Stroke 135HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Generic 4-Stroke 135HP outboard engines. Use it to find compatible parts and practical service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection for a wide range of compatible components. Scroll to the bottom of the 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\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 135HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate\/serial plate: Typically on the transom clamp or swivel bracket. Record the full model designation and serial number.\u003c\/li\u003e\n    \u003cli\u003eModel code and suffix: Letters often indicate shaft length (S\/L\/X), starting\/controls (electric\/remote), and revision\/year code. Check the owner’s manual for decoding.\u003c\/li\u003e\n    \u003cli\u003ePlatform clues: A 4‑stroke 135HP is commonly an inline‑4 EFI. Some Mercury 135HP variants are supercharged (Verado). Cowl labels and under‑cowl components (air intake routing, supercharger belt) help distinguish platforms.\u003c\/li\u003e\n    \u003cli\u003eRigging differences: Note whether you have mechanical controls vs. digital controls, and standard vs. counter‑rotation gearcase, as some parts differ.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eInline‑4 EFI 4‑Stroke (Naturally Aspirated)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInline‑4, EFI 4‑stroke; widely used at 135HP across multiple brands.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e135HP EFI 4‑stroke examples from major OEMs in the mid‑2000s and newer; typically long or extra‑long shaft options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGood fuel economy, broad torque curve, simpler service than supercharged platforms.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eService items include oil filter, spark plugs, inline fuel filter, VST (if equipped), water pump kit, thermostats, and anodes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eInline‑4 4‑Stroke (Supercharged Variant, e.g., Verado‑type)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInline‑4 supercharged 4‑stroke with EFI; often uses belt‑driven boost and specific rigging components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e135HP supercharged variants popular in the 2000s–2010s on select platforms.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eStrong mid‑range and hole‑shot, maintains power in hotter or higher‑altitude conditions.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eObserve belt inspection intervals and platform‑specific filters. Some rigging items (steering\/controls) and mount components differ from EFI non‑supercharged motors.\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑stroke outboards. Always follow your engine’s official service manual for exact procedures and schedules.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eUse marine 4‑stroke oil of the proper grade and replace the oil filter each service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect for water or metal; replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e100–300 hours (inspect at 100)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGap and heat range must match your platform’s spec.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eFuel filter \/ water‑separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eReplace inline and VST filters as applicable; drain any water from separators.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\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:8px;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 2–3 seasons (or 200 hours)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eReplace sooner if weak telltale or overheat events occur.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAnodes (zincs)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every trip; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMatch anode material to your water (zinc\/aluminum\/magnesium).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\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\u003ePropulsion \u0026amp; Handling – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\"\u003ePropeller Guards\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWeak telltale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect intake screens for debris; verify impeller condition; test thermostats; confirm proper anode condition and flush passages.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWater pump impeller kit, intake screen, thermostat, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck prop pitch\/condition; replace fuel filters; inspect spark plugs; verify clean fuel and adequate fuel supply\/venting.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePropeller, fuel filters, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eConfirm battery voltage; inspect plugs; replace inline\/VST fuel filters; consider injector cleaning if hours are high.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eSpark plugs, fuel filters, injectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eChange gear oil and check for water; inspect propshaft seals; verify correct prop hub and tightness.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, bearings, propeller hub\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different 135HP 4‑stroke platforms?\u003c\/summary\u003e\n    \u003cp\u003eNot always. Even within 135HP 4‑strokes, differences in year, serial range, shaft length, and whether the engine is supercharged vs. naturally aspirated affect compatibility. Verify by model\/serial and component diagrams.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eA conservative interval is every 2–3 seasons (about 200 hours) or any time cooling performance is questionable. Inspect the housing and wear plate and consider a full water pump kit if wear is present.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eAt least every 100 hours or annually. If you find milky oil (water intrusion) or metal shavings, service seals and re‑check after a short interval.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model designation, serial number, shaft length (S\/L\/XL), control type (mechanical vs. digital if applicable), and any visible part casting numbers. Photos of the nameplate and the part to be replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts? Browse the main Mercury collection by horsepower, year, and model to locate compatible components for many 135HP 4‑stroke platforms.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#16a34a; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#374151;\"\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":"whale-tail-hydrofoil-stabilizer-fits-outboard-motors-stern-drives-40-300-hp-replaces-fo2003","title":"Whale Tail Hydrofoil Stabilizer for 40–300 HP Outboard Motors and Stern Drives","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis marine-grade reinforced PA66 nylon \u003cstrong\u003eWhale Tail Hydrofoil Stabilizer\u003c\/strong\u003e is designed for many 40–300 HP outboard motors and stern drives. By adding hydrodynamic lift at the stern, it can help improve low-speed handling, reduce porpoising, shorten time to plane, and help the boat remain on plane at lower speeds.\u003c\/p\u003e\n\u003cp\u003eThis is an aftermarket hydrofoil stabilizer referenced in some listings as a replacement for FO2003 and as a Whale Tail-style hydrofoil. Confirm the dimensions, mounting area, engine or drive configuration, and listed exceptions before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrill-and-bolt installation on the anti-cavitation plate; mounting hardware and a drill bit are included.\u003c\/li\u003e\n  \u003cli\u003eMade from reinforced, marine-grade PA66 nylon for strength, impact resistance, and corrosion resistance.\u003c\/li\u003e\n  \u003cli\u003eThe curved hydrofoil profile is intended to improve stern lift while helping manage drag and propeller-area turbulence.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eThe references below are aftermarket or listing references and should not be treated as proof of fitment by themselves. Always compare the product dimensions and application requirements with your equipment.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eReference\u003c\/th\u003e\n        \u003cth\u003eNumber or Description\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAftermarket reference\u003c\/td\u003e\n        \u003ctd\u003eFO2003\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eProduct style\u003c\/td\u003e\n        \u003ctd\u003eWhale Tail Hydrofoil Stabilizer\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine and Drive Compatibility\u003c\/h2\u003e\n\u003cp\u003eApplication depends on the shape and available mounting area of the anti-cavitation plate or drive. The following information describes the intended application range and important exclusions noted for this style of hydrofoil; it does not replace a dimensional fit check.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Drive Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand or Application\u003c\/th\u003e\n        \u003cth\u003eCompatibility\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\u003eGeneral application\u003c\/td\u003e\n        \u003ctd\u003eMany 40–300 HP outboard motors and stern drives\u003c\/td\u003e\n        \u003ctd\u003eConfirm clearance, mounting surface, dimensions, and hardware requirements before installation.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eSX-A, DPS, DPR, DPH, and 280\/290 series applications may be suitable\u003c\/td\u003e\n        \u003ctd\u003eSome installations may require longer bolts and 1-inch fender washers. Not recommended for Volvo Ocean Series XDP applications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eMany 40–300 HP applications\u003c\/td\u003e\n        \u003ctd\u003eNot recommended for Mercury 4-Stroke 40, 50, or 60 HP models and not for Mercury Bravo II.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHonda\u003c\/td\u003e\n        \u003ctd\u003eMany 40–200 HP applications\u003c\/td\u003e\n        \u003ctd\u003eNot recommended for applications above 200 HP.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eMany 40–300 HP applications\u003c\/td\u003e\n        \u003ctd\u003eNot recommended for 350 HP applications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\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\u003eFour-bolt installation; drilling required\u003c\/dd\u003e\n  \u003cdt\u003eMounting Location\u003c\/dt\u003e\n  \u003cdd\u003eAnti-cavitation plate or compatible stern-drive mounting surface\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n  \u003cdd\u003eReinforced PA66 nylon, marine-grade plastic\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n  \u003cdd\u003eBlue, silver, or red depending on the selected model or available version\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n  \u003cdd\u003eApproximately 17 × 14.4 inches (432 × 366 mm)\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n  \u003cdd\u003eApproximately 1.72 kg (3.79 lb)\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n  \u003cdd\u003eDrill and bolt\u003c\/dd\u003e\n  \u003cdt\u003eHydrofoil Profile\u003c\/dt\u003e\n  \u003cdd\u003eCurved profile designed to provide stern lift and help reduce porpoising\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\u003e4 × Sets of stainless-steel screws, washers, and nuts\u003c\/li\u003e\n  \u003cli\u003e1 × 6.5 mm drill bit\u003c\/li\u003e\n  \u003cli\u003e1 × Installation instruction sheet\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 battery before beginning installation.\u003c\/li\u003e\n  \u003cli\u003eCenter the hydrofoil on the anti-cavitation plate or compatible drive mounting surface. Position it as far back as practical without interfering with propeller movement or steering components.\u003c\/li\u003e\n  \u003cli\u003eUse the hydrofoil mounting holes as a template and mark the four drilling points.\u003c\/li\u003e\n  \u003cli\u003eRemove the hydrofoil and carefully drill the marked holes with the included 6.5 mm drill bit, provided the plate thickness and material are suitable for drilling.\u003c\/li\u003e\n  \u003cli\u003ePlace the hydrofoil on the plate and align it with the drilled holes.\u003c\/li\u003e\n  \u003cli\u003eInsert the stainless-steel bolts from the top and secure them underneath with the washers and nuts.\u003c\/li\u003e\n  \u003cli\u003eTighten the fasteners evenly and securely. Do not overtighten, as this may damage the plate or the hydrofoil.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test the boat at low speed in a safe, open-water area. Check the installation again after the initial test run.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting and FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this hydrofoil fit my specific engine or drive?\u003c\/summary\u003e\n  \u003cp\u003eThis stabilizer is intended for many 40–300 HP outboard motors and stern drives, but fitment depends on the plate or drive geometry, available mounting area, clearance, and the exclusions listed above. Compare the dimensions and installation requirements with your equipment before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I have to drill holes in the anti-cavitation plate?\u003c\/summary\u003e\n  \u003cp\u003eYes. This model uses a four-bolt installation and requires four holes to be drilled in a suitable mounting surface. If you are not certain that the plate can be drilled safely, consult a qualified marine technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow can a hydrofoil improve performance?\u003c\/summary\u003e\n  \u003cp\u003eThe hydrofoil adds hydrodynamic lift to the stern. Depending on the boat and setup, this may help the boat reach plane sooner, stay on plane at lower speeds, improve low-speed handling, and reduce bow bouncing or porpoising.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this reduce my boat's top speed?\u003c\/summary\u003e\n  \u003cp\u003eResults vary by boat, engine, propeller, loading, and installation. A hydrofoil may change handling and speed characteristics, and some setups may experience a small reduction in top speed because of added drag. Test the boat carefully after installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the benefit of reinforced PA66 nylon?\u003c\/summary\u003e\n  \u003cp\u003eReinforced PA66 nylon combines stiffness, impact resistance, and corrosion resistance. It is intended to provide a durable alternative to ordinary unreinforced plastic in a marine environment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for an aftermarket hydrofoil stabilizer. The FO2003 reference is provided as an aftermarket reference only and does not, by itself, establish OEM manufacture or universal interchangeability.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow should I confirm fitment before ordering?\u003c\/summary\u003e\n  \u003cp\u003eCheck the available mounting area, overall dimensions, anti-cavitation plate or drive shape, propeller and steering clearance, engine horsepower, and the model-specific exclusions. If any measurement or application detail differs, do not proceed without professional confirmation.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the dimensions, mounting surface, clearances, and application notes against your equipment before purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product requires drilling and bolting; professional marine installation is recommended when you are not experienced with structural or engine-related work.\u003c\/li\u003e\n  \u003cli\u003eInspect all fasteners and the hydrofoil after the first test run and periodically during use.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the boat if the hydrofoil is loose, cracked, damaged, or interfering with the propeller, steering, or trim system.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement product, not an OEM component.\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 selected for dependable materials and real-world use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — We aim to provide practical replacement solutions with clear product information.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport-Focused Service\u003c\/strong\u003e — Confirm your application details before ordering and contact support if you need help reviewing product measurements or installation requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718235459899,"sku":"WV-JALU-N3EB","price":64.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/WV-JALU-N3EB.png?v=1762958052"}],"url":"https:\/\/seasierra.com\/collections\/generic-4-stroke-135hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}