{"product_id":"3888821-lower-unit-seal-kit-for-volvo-penta-sx-a-jlm-marine","title":"3888821 Lower Unit Seal Kit for Volvo Penta SX-A | JLM Marine","description":"\u003ch2\u003eLower Unit Seal Kit – Fits Volvo Penta SX-A Sterndrive\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eLower Unit Seal Kit\u003c\/strong\u003e is engineered for \u003cstrong\u003eVolvo Penta SX-A\u003c\/strong\u003e sterndrive models, delivering reliable sealing performance for lower gearcase assemblies. Designed to meet OEM specifications, this kit ensures proper protection against water and contamination in transom-mounted sterndrive applications.\u003c\/p\u003e\n\n\u003cp\u003eDirect replacement for \u003cstrong\u003eVolvo Penta 3888821\u003c\/strong\u003e, \u003cstrong\u003eOrbitrade 23022\u003c\/strong\u003e, and \u003cstrong\u003eSierra 18-2583\u003c\/strong\u003e. This aftermarket seal kit provides a cost-effective solution for maintaining your lower unit during routine service or gearcase rebuilds.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComprehensive seal kit for complete lower unit service\u003c\/li\u003e\n\u003cli\u003ePrecision-engineered for SX-A transom sterndrive systems\u003c\/li\u003e\n\u003cli\u003eDirect cross-reference compatibility with multiple aftermarket brands\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\" style=\"border-collapse:collapse; width:100%;\"\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\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3888821\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrbitrade\u003c\/td\u003e\n\u003ctd\u003e23022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-2583\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.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003eSX-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%;\"\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eLower Unit \/ Gearcase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive Type\u003c\/td\u003e\n\u003ctd\u003eTransom Sterndrive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit Type\u003c\/td\u003e\n\u003ctd\u003eComplete Seal Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Reference\u003c\/td\u003e\n\u003ctd\u003e3888821\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 kit includes all necessary seals and gaskets for a complete lower unit service:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete seal kit\u003c\/strong\u003e for Volvo Penta SX-A lower gearcase assembly\u003c\/li\u003e\n\u003cli\u003eAll seals, gaskets, and O-rings required for lower unit rebuild\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Package contents are designed for one complete lower unit service.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and remove the sterndrive unit from the transom assembly following manufacturer procedures.\u003c\/li\u003e\n\u003cli\u003eDrain all gear oil from the lower unit and clean the exterior thoroughly to prevent contamination.\u003c\/li\u003e\n\u003cli\u003eDisassemble the lower gearcase, removing the propeller shaft, drive shaft, and gear assemblies. Keep all components organized.\u003c\/li\u003e\n\u003cli\u003eRemove all old seals, gaskets, and O-rings from their housings using appropriate seal removal tools.\u003c\/li\u003e\n\u003cli\u003eClean all mating surfaces with a non-abrasive cleaner and inspect for scoring, corrosion, or damage that may affect seal performance.\u003c\/li\u003e\n\u003cli\u003eInstall new seals from the kit using a seal driver or appropriate-sized socket to ensure proper seating without damage.\u003c\/li\u003e\n\u003cli\u003eApply marine-grade grease to seal lips before installation to prevent dry starts and ensure proper initial lubrication.\u003c\/li\u003e\n\u003cli\u003eReassemble the lower unit components in reverse order, ensuring all bearings, shims, and gears are correctly positioned.\u003c\/li\u003e\n\u003cli\u003eTorque all fasteners to manufacturer specifications using a calibrated torque wrench.\u003c\/li\u003e\n\u003cli\u003eReinstall the lower unit to the transom, ensuring proper alignment and secure mounting.\u003c\/li\u003e\n\u003cli\u003eRefill the gearcase with the correct grade and quantity of gear oil through the fill hole until it reaches the vent hole.\u003c\/li\u003e\n\u003cli\u003ePerform a pressure test if possible, then run the engine briefly and recheck oil levels for leaks or irregularities.\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 kit fits my Volvo Penta sterndrive?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify that your drive is an \u003cstrong\u003eSX-A model\u003c\/strong\u003e by checking your sterndrive identification plate or owner's manual. Cross-reference your current seal kit part number with \u003cstrong\u003e3888821\u003c\/strong\u003e, and ensure the seal dimensions match before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the lower unit seals?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace lower unit seals during major gearcase service or whenever you notice gear oil leaks, water contamination in the oil, or after approximately 3–5 years of use. Annual inspection during winterization is recommended.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are signs that my lower unit seals are failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Watch for milky or discolored gear oil (indicating water intrusion), oil dripping from the lower unit, difficulty shifting gears, or unusual noise from the gearcase. Any of these symptoms warrant immediate seal inspection and replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse seals if I'm only inspecting the lower unit?\u003c\/strong\u003e\u003cbr\u003e\nA: No, seals should always be replaced once removed. Even if they appear intact, the removal process typically damages the seal lips or compromises their ability to maintain a proper seal, risking water intrusion and gearcase damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between OEM and aftermarket seal kits?\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":51981005619513,"sku":"23SK648","price":57.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/A8aa1c41a5c0145e1be12c25898ab9f0dm.webp?v=1772455051","url":"https:\/\/jlmmarine.com\/ru\/products\/3888821-lower-unit-seal-kit-for-volvo-penta-sx-a-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}