{"product_id":"mercury-mercruiser-seacore-starboard-trim-cylinder-assembly-8m0128693-bravo","title":"Mercury MerCruiser SeaCore Starboard Trim Cylinder Assembly — OEM 8M0128693 | Bravo One, Two, Three","description":"\u003ch2\u003eMercury MerCruiser SeaCore Starboard Trim Cylinder Assembly — OEM 8M0128693 | Bravo One, Two, Three\u003c\/h2\u003e\u003cp\u003eThis genuine OEM starboard power-trim cylinder is the SeaCore-configuration replacement for selected MerCruiser Bravo sterndrives. It forms the starboard side of the hydraulic trim system, working together with the port cylinder to raise, lower, and hold the sterndrive at the correct trim angle under hydraulic pressure. If the starboard side of your Bravo trim system is leaking, won’t hold trim position, or has a damaged rod or cylinder body, 8M0128693 is the OEM replacement — but confirming SeaCore configuration is critical before ordering.\u003c\/p\u003e\u003ch2\u003ePart Information\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 8M0128693\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury \/ MerCruiser\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Starboard hydraulic power-trim cylinder assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e SeaCore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition:\u003c\/strong\u003e Starboard (right side)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 8M0108282, 866464A02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatching Port Cylinder:\u003c\/strong\u003e 8M0128692 (SeaCore port side)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Hydraulic power-trim system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One starboard cylinder per trim assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN \/ UPC:\u003c\/strong\u003e 745061776890\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser Bravo One — SeaCore trim-cylinder configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo Two — SeaCore trim-cylinder configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo Three — SeaCore trim-cylinder configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo X One \/ Two \/ Three — SeaCore configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo XR One \/ Three — SeaCore configuration\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo XR SportMaster — SeaCore configuration\u003c\/li\u003e\n\u003cli\u003eSelected high-performance and integrated transom applications using this SeaCore starboard cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImportant:\u003c\/strong\u003e Confirm the drive model, transom assembly, and trim-cylinder configuration before ordering — standard Bravo systems use a different starboard trim cylinder; see \u003ca href=\"\/products\/mercury-mercruiser-quicksilver-bravo-trim-cylinder-assy-starboard-8m0132610\"\u003e8M0132610\u003c\/a\u003e for the standard (non-SeaCore) starboard cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Parts\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003ca href=\"\/products\/mercury-mercruiser-quicksilver-bravo-trim-cylinder-assy-starboard-8m0132610\"\u003eMercury MerCruiser Bravo Trim Cylinder Assembly Starboard — 8M0132610\u003c\/a\u003e (standard non-SeaCore version)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHydraulic fluid leaking from the cylinder body, rod seal, or fitting connections\u003c\/li\u003e\n\u003cli\u003eSterndrive will not hold trim position and diagnosis points to cylinder failure\u003c\/li\u003e\n\u003cli\u003eCylinder rod is bent, scored, or corroded beyond service limits\u003c\/li\u003e\n\u003cli\u003eCylinder body is cracked or physically damaged\u003c\/li\u003e\n\u003cli\u003eInternal cylinder wear causing erratic or weak trim operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInspect hydraulic hoses, fittings, mounting pins, anodes, and mating hardware while the cylinder is removed\u003c\/li\u003e\n\u003cli\u003eReplace hoses and seals as needed rather than reusing worn components\u003c\/li\u003e\n\u003cli\u003eFollow the applicable Mercury service procedure for cylinder installation and hydraulic-system bleeding\u003c\/li\u003e\n\u003cli\u003eVerify smooth, full-range trim operation and check for fluid leakage before returning the drive to service\u003c\/li\u003e\n\u003cli\u003eTorque all hydraulic fittings to Mercury specification to prevent leaks under pressure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical FAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between SeaCore and standard Bravo trim cylinders?\u003c\/strong\u003e\u003cbr\u003eMercury’s SeaCore configuration uses a corrosion-protection package designed for saltwater environments, including specific cylinder materials and coatings. Standard Bravo drives use a different starboard cylinder (\u003ca href=\"\/products\/mercury-mercruiser-quicksilver-bravo-trim-cylinder-assy-starboard-8m0132610\"\u003e8M0132610\u003c\/a\u003e). The two are not interchangeable — always confirm whether your transom assembly is SeaCore or standard before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part numbers did 8M0128693 supersede?\u003c\/strong\u003e\u003cbr\u003e8M0128693 is the current OEM replacement for 8M0108282 and 866464A02. If you have been ordering either of those numbers, 8M0128693 is the updated part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this listing include the port cylinder?\u003c\/strong\u003e\u003cbr\u003eNo. This listing is for the starboard (right-side) cylinder only. The matching SeaCore port-side cylinder is 8M0128692. Both cylinders are typically replaced together when servicing a hydraulic leak or major trim system overhaul.\u003c\/p\u003e\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\u003cp\u003eThe most common ordering error on Bravo trim cylinders is not confirming SeaCore vs. standard — both configurations are listed in Mercury’s catalog for the same drive models, and the part numbers look similar. The most reliable way to confirm is to check the existing cylinder part number or match the transom assembly number. It’s also worth noting that trim cylinders rarely fail in isolation — if one side is leaking, inspecting the hoses, fittings, and port cylinder at the same time often prevents a repeat visit. Browse the full \u003ca href=\"\/collections\/mercruiser-marine-engine-parts\"\u003eMerCruiser Marine Engine Parts\u003c\/a\u003e collection for related sterndrive components.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":51324693970980,"sku":"8M0128693","price":1109.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/39dbb344-ea2c-4713-945f-9edc05bface6.png?v=1788215265","url":"https:\/\/marisolmarine.com\/products\/mercury-mercruiser-seacore-starboard-trim-cylinder-assembly-8m0128693-bravo","provider":"Marisol Marine Company","version":"1.0","type":"link"}