{"product_id":"tilt-trim-motor-fits-mercury-mariner-135-250hp-replaces-878265a1-828708t","title":"Tilt Trim Motor – Fits Mercury\/Mariner 135-250HP (Replaces 878265A1, 828708T)","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis replacement \u003cstrong\u003eTilt Trim Motor – Fits Mercury\/Mariner 135-250HP 1996-UP (Replaces 878265A1, 828708T)\u003c\/strong\u003e is engineered to restore trim and tilt functionality to a wide range of Mercury and Mariner outboards. It is designed for 135HP, 150HP, 175HP, 200HP, 225HP, and 250HP 4-Stroke models from 1996 and newer, as well as 105-140HP Jet drive applications.\u003c\/p\u003e\n\u003cp\u003eIt serves as a direct cross-reference for Mercury\/Mariner parts 828708, 828708T, 878265A1, 878265A4, and 8M0031551, along with aftermarket equivalents from Sierra (18-6773), Mallory (9-18204), Arco (6250), and MES (T1082M).\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eEasy direct bolt-on installation.\u003c\/li\u003e\n    \u003cli\u003eFeatures a standard 2-wire connection with bullet connector ends.\u003c\/li\u003e\n    \u003cli\u003eThe reversible motor rotation allows for proper up and down operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\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\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e828708T\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e878265A1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e878265A4\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n        \u003ctd\u003e8M0031551\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-6773\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-18204\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eArco\u003c\/td\u003e\n        \u003ctd\u003e6250\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMES\u003c\/td\u003e\n        \u003ctd\u003eT1082M\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\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\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e135\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003eTilt\/Trim All Models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003eTilt\/Trim All Models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eXR6\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eMag III\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eXRI\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0D082000–0G303045\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-81741892\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eSKI\u003c\/td\u003e\n        \u003ctd\u003e175\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0D082000–0G303045\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-81741892\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eMAG, XRI\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0D082000–0G303045\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-81741892\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003ePRO MAX, SUPER MAG\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0D935000–0G610079\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eBelgium Cat# 90-80856794\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003ePRO MAX, SUPER MAG\u003c\/td\u003e\n        \u003ctd\u003e200\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0G857000–0G858150\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eBelgium Cat# 90-803922\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003ePRO MAX SUPER MAG\u003c\/td\u003e\n        \u003ctd\u003e225\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0G610104–0G856999\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-80918498\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e250\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eAll Models\u003c\/td\u003e\n        \u003ctd\u003e250\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0G129222–0G760299\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-80917095\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eJet\u003c\/td\u003e\n        \u003ctd\u003e105-140\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1996–ON\u003c\/td\u003e\n        \u003ctd\u003e828708, 828708T, 878265A1, 878265A4\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003eJet\u003c\/td\u003e\n        \u003ctd\u003e140\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e0G760300–0G960499\u003c\/td\u003e\n        \u003ctd\u003e828708\u003c\/td\u003e\n        \u003ctd\u003eUSA Cat# 90-803170\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\u003eTilt Trim Motor\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n    \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003e2-wire connection with bullet connector ends\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMetal\u003c\/dd\u003e\n    \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eLength: 124.7mm (4.909in); OD: 75mm (2.953in); Shaft OD: 8mm (0.315in)\u003c\/dd\u003e\n    \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e1.54kg (3.39lb)\u003c\/dd\u003e\n    \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eDirect bolt-on\u003c\/dd\u003e\n    \u003cdt\u003eRotation\u003c\/dt\u003e\n\u003cdd\u003eReversible\u003c\/dd\u003e\n    \u003cdt\u003eCurrent Type\u003c\/dt\u003e\n\u003cdd\u003eDC\u003c\/dd\u003e\n    \u003cdt\u003eShaft Type\u003c\/dt\u003e\n\u003cdd\u003eTanged Shaft\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 Tilt Trim Motor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eDisconnect the boat's battery terminals to prevent electrical shorts.\u003c\/li\u003e\n    \u003cli\u003eSecure the outboard motor in the fully tilted position using the tilt lock lever or a suitable brace.\u003c\/li\u003e\n    \u003cli\u003eLocate and disconnect the electrical leads for the existing tilt trim motor.\u003c\/li\u003e\n    \u003cli\u003eCarefully unbolt and remove the old motor. Be prepared for potential residual hydraulic fluid.\u003c\/li\u003e\n    \u003cli\u003eClean the mounting surface and surrounding area to ensure a good seal.\u003c\/li\u003e\n    \u003cli\u003eMount the new tilt trim motor, ensuring it is aligned correctly, and tighten the mounting bolts to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eConnect the electrical leads of the new motor, matching the wire colors to the harness.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery terminals.\u003c\/li\u003e\n    \u003cli\u003eCarefully disengage the tilt lock and test the motor's operation, checking for smooth up and down movement and listening for any unusual noises.\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 my tilt trim motor is failing?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs of a failing motor include slow or jerky operation, a humming or clicking sound without movement, or the motor failing to operate entirely. You may also notice hydraulic fluid leaks around the motor seals.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eWill this fit models outside the listed years?\u003c\/summary\u003e\n    \u003cp\u003eWe can only guarantee fitment for the models and years specified. Using this part on other models is not recommended, as even small differences can affect performance and safety. Always compare your old part to the images and specifications.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between the various replacement part numbers?\u003c\/summary\u003e\n    \u003cp\u003eThe numbers listed (e.g., 878265A1, 8M0031551) represent different revisions or part numbers used by Mercury\/Mariner and various aftermarket brands over time for the same component. This part is designed to be a direct replacement for all of them.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eIs the motor's rotation reversible?\u003c\/summary\u003e\n    \u003cp\u003eYes, this motor is reversible. The direction of operation (up or down) is controlled by reversing the polarity of the DC current, which is handled by your boat's trim relay and switch system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eWhat maintenance does this motor require?\u003c\/summary\u003e\n    \u003cp\u003eThe motor itself is a sealed unit and requires no internal maintenance. Periodically inspect the electrical connections for corrosion and ensure the motor housing remains clean and free of debris.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n    \u003csummary\u003eCan I replace just the motor without replacing the whole trim assembly?\u003c\/summary\u003e\n    \u003cp\u003eYes, this part is just the electric motor. If your hydraulic pump and ram assembly are in good condition, you can replace only the motor, which is often the point of failure.\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":50718260658491,"sku":"23TM408","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/87-SERY-5C02.png?v=1762958299","url":"https:\/\/seasierra.com\/products\/tilt-trim-motor-fits-mercury-mariner-135-250hp-replaces-878265a1-828708t","provider":"SeaSierra","version":"1.0","type":"link"}