{"product_id":"tilt-end-cap-seals-fits-mercury-75-250hp-outboard-replaces-878239a02-811606-878239a1","title":"Tilt End Cap \u0026 Seals – Fits Mercury 75-250HP Outboard (Replaces 878239A02, 811606, 878239A1)","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\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis replacement \u003cb\u003eTilt End Cap \u0026amp; Seals\u003c\/b\u003e assembly is designed for Mercury Marine 75-250HP 2-stroke and 4-stroke V6 outboard engines from 1991–2017, including Optimax, EFI, and carbureted models. It provides a durable, reliable solution for repairing leaking or damaged tilt cylinders.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct interchange for Mercury part numbers 878239A02, 878239A1, 811606, and 8M0090322, among other aftermarket equivalents.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered as a direct-fit replacement for straightforward installation.\u003c\/li\u003e\n\u003cli\u003eConstructed from aircraft-grade aluminum with a hard anodized coating for superior corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eIncludes high-grade Viton and urethane seals to ensure a long-lasting, leak-free repair.\u003c\/li\u003e\n\u003c\/ul\u003e\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\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e878239A02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e878239A1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e811606\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e8M0090322\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSAIL MARINE\u003c\/td\u003e\n        \u003ctd\u003e878239A02\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eFive Star Marine\u003c\/td\u003e\n        \u003ctd\u003eFSM042\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFits a wide range of Mercury V6 (Generation 2 \u0026amp; 3) outboards, including Optimax, EFI, and carbureted models. Also compatible with select 4-stroke applications, but does not fit L6 Verado engines.\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\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\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\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e135\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e250\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eV6 Gen 2 \u0026amp; 3\u003c\/td\u003e\n        \u003ctd\u003e300\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1991–2017\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eOptimax\/EFI\/Carb\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e135-200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e878239A02\/878239A1\/811606\u003c\/td\u003e\n        \u003ctd\u003eDoes NOT fit L6 Verado\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eTilt Cylinder End Cap with Seals\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eTilt Ram\/Cylinder\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eAircraft Grade Aluminum with Hard Anodized Coating\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eTilt Ram End Cap\/Gland\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003e1-2 years (varies by manufacturer)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eMilitary Grade Type 3 Hard Coat Anodized; Viton\/High Grade Urethane Seals\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Tilt End Cap with Seals (878239A02\/878239A1\/811606\/8M0090322)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eSafely support the outboard motor in the fully tilted position using a motor support bracket.\u003c\/li\u003e\n\u003cli\u003eRelieve any hydraulic pressure in the system according to your service manual.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan under the tilt cylinder to catch hydraulic fluid.\u003c\/li\u003e\n\u003cli\u003eUsing a compatible spanner wrench, carefully unscrew and remove the old tilt end cap.\u003c\/li\u003e\n\u003cli\u003eRemove the old seals from the cylinder bore and ram, being careful not to scratch any surfaces.\u003c\/li\u003e\n\u003cli\u003eClean the cylinder and ram thoroughly.\u003c\/li\u003e\n\u003cli\u003eLubricate the new seals with fresh hydraulic fluid and install them onto the new end cap and into the cylinder as required.\u003c\/li\u003e\n\u003cli\u003eCarefully thread the new end cap into the cylinder and tighten to the manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eRefill the trim\/tilt reservoir with the recommended hydraulic fluid and bleed the system of air by cycling the tilt and trim function several times.\u003c\/li\u003e\n\u003cli\u003eCheck for leaks and top off the fluid level as needed.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this fit my Mercury Verado engine?\u003c\/summary\u003e\u003cp\u003eNo, this end cap is specifically not compatible with L6 Verado models. It is designed for V6 Gen 2 \u0026amp; 3 and specific 4-stroke models within the specified horsepower range.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow can I tell if my current end cap is failing?\u003c\/summary\u003e\u003cp\u003eThe most common signs of a failing tilt end cap are hydraulic fluid leaks around the tilt ram, a \"spongy\" or drifting trim\/tilt system that won't hold its position, or visible bubbling, corrosion, and physical damage on the cap itself.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the main difference between this part and the OEM version?\u003c\/summary\u003e\u003cp\u003eThis is an aftermarket part built to meet or exceed OEM specifications. It is constructed from high-strength, aircraft-grade aluminum with a military-grade Type 3 hard anodized coating for enhanced durability and corrosion resistance. The included seals are made from high-grade Viton and urethane for optimal performance and longevity.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat tools are needed to install this part?\u003c\/summary\u003e\u003cp\u003eInstallation requires a specific spanner wrench designed for marine tilt and trim caps to safely remove the old cap and tighten the new one. You will also need basic mechanic's tools, a drain pan, and a secure way to support the outboard motor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs it necessary to replace the seals when replacing the cap?\u003c\/summary\u003e\u003cp\u003eYes. This kit includes all the necessary seals, and they should always be replaced when installing a new end cap to ensure a proper, leak-proof fit and prevent premature failure.\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\u003ePro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n\u003cli\u003eFast Global Fulfillment — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n\u003cli\u003eManufacturer-Direct Value — 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":50718262722875,"sku":"24EC157R","price":94.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24EC157R.png?v=1762958393","url":"https:\/\/seasierra.com\/products\/tilt-end-cap-seals-fits-mercury-75-250hp-outboard-replaces-878239a02-811606-878239a1","provider":"SeaSierra","version":"1.0","type":"link"}