{"product_id":"8m0137703-trim-line-manifold-for-mercury-mercruiser-alpha-bravo-jlm-marine","title":"8M0137703 Trim Line Manifold for Mercury MerCruiser Alpha Bravo | JLM Marine","description":"\u003ch2\u003eTrim Line Manifold for Mercury MerCruiser Alpha Bravo – 8M0137703\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eTrim Line Manifold\u003c\/strong\u003e is designed for \u003cstrong\u003eMerCruiser Alpha One Gen I \u0026amp; Gen II sterndrives (1972–1990)\u003c\/strong\u003e and \u003cstrong\u003eMerCruiser R\/MR\/Bravo drives (1983 and newer)\u003c\/strong\u003e. It serves as a critical hydraulic connector for the trim system, ensuring reliable fluid routing and proper outdrive operation.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly replaces Mercury MerCruiser OEM part numbers \u003cstrong\u003e98825A4\u003c\/strong\u003e, \u003cstrong\u003e8M0080805\u003c\/strong\u003e, \u003cstrong\u003e8M0137703\u003c\/strong\u003e, and \u003cstrong\u003e98825A12\u003c\/strong\u003e. It is compatible with most MerCruiser outdrives that use \u003cstrong\u003e1\/4\" tube fittings\u003c\/strong\u003e from 1983 onward.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete manifold assembly kit with all necessary mounting hardware and gaskets\u003c\/li\u003e\n  \u003cli\u003eFits hydraulic trim hoses on MerCruiser outdrives with 1\/4\" tube fittings (1983–present)\u003c\/li\u003e\n  \u003cli\u003eEssential component for maintaining proper trim and tilt function\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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 MerCruiser\u003c\/td\u003e\n      \u003ctd\u003e8M0137703\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n      \u003ctd\u003e98825A4\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n      \u003ctd\u003e8M0080805\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n      \u003ctd\u003e98825A12\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eYears\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\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eAlpha One Gen I \u0026amp; Gen II Sterndrives\u003c\/td\u003e\n        \u003ctd\u003e1972–1990\u003c\/td\u003e\n        \u003ctd\u003eAll models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eR\/MR\/Bravo Drives\u003c\/td\u003e\n        \u003ctd\u003e1983–Up\u003c\/td\u003e\n        \u003ctd\u003eOutdrives with 1\/4\" tube fittings\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\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Number\u003c\/td\u003e\n      \u003ctd\u003e8M0137703\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eType\u003c\/td\u003e\n      \u003ctd\u003eManifold Assembly HYD CONNECTOR\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eEngine Type\u003c\/td\u003e\n      \u003ctd\u003eMercury MerCruiser Sterndrives\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eTube Fitting Size\u003c\/td\u003e\n      \u003ctd\u003e1\/4\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eThis trim line manifold kit includes the following components:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × Plate\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × Junction block body\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e2 × Gaskets\u003c\/li\u003e\n  \u003cli\u003e2 × Lockwashers\u003c\/li\u003e\n  \u003cli\u003e2 × Mounting bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and relieve hydraulic pressure from the trim system before beginning work.\u003c\/li\u003e\n  \u003cli\u003eRemove the old trim line manifold by disconnecting the hydraulic lines and unbolting the mounting hardware. Be prepared for minor fluid spillage.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surface thoroughly to remove old gasket material and debris.\u003c\/li\u003e\n  \u003cli\u003ePosition one new gasket on the mounting surface, aligning all bolt holes.\u003c\/li\u003e\n  \u003cli\u003eInstall the junction block body onto the gasket, ensuring proper alignment with hydraulic line ports.\u003c\/li\u003e\n  \u003cli\u003ePlace the plate over the junction block body with the second gasket in between.\u003c\/li\u003e\n  \u003cli\u003eInsert the two mounting bolts with lockwashers and tighten in a cross-pattern to ensure even compression. Do not overtighten.\u003c\/li\u003e\n  \u003cli\u003eReconnect all hydraulic trim lines to the appropriate ports on the manifold, ensuring connections are snug and leak-free.\u003c\/li\u003e\n  \u003cli\u003eBleed air from the hydraulic trim system according to your engine's service manual.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and test the trim function through its full range of motion.\u003c\/li\u003e\n  \u003cli\u003eInspect all connections for leaks while the system is under pressure.\u003c\/li\u003e\n  \u003cli\u003eIf any leaks are detected, relieve pressure, retighten connections, and retest. Professional installation is recommended if you are unfamiliar with hydraulic systems.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this manifold fits my MerCruiser outdrive?\u003c\/strong\u003e\u003cbr\u003e\nA: Check your outdrive model and year against the compatibility table above. This manifold fits Alpha One Gen I \u0026amp; Gen II (1972–1990) and R\/MR\/Bravo drives (1983–up) that use 1\/4\" hydraulic tube fittings. You can also cross-reference your existing part number with 98825A4, 8M0080805, 8M0137703, or 98825A12.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my trim line manifold needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include hydraulic fluid leaks around the manifold, slow or erratic trim\/tilt operation, loss of trim function, or visible corrosion and damage to the manifold body or fittings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to bleed the hydraulic system after installing this manifold?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes, bleeding the trim system is essential after installation to remove air that may have entered during the replacement process. Follow your engine's service manual for the proper bleeding procedure to ensure optimal trim performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this manifold myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and are comfortable working with hydraulic systems, you can install this yourself following the installation guide. However, professional installation is recommended to ensure proper sealing, correct torque specifications, and thorough system bleeding.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981001228601,"sku":"23KM150","price":36.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_0162ca11-347e-46ef-89d5-a86b10639e24.jpg?v=1772414225","url":"https:\/\/jlmmarine.com\/ru\/products\/8m0137703-trim-line-manifold-for-mercury-mercruiser-alpha-bravo-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}