{"product_id":"26-32511a1-upper-unit-seal-kit-for-mercruiser-alpha-one-gen-i-1a-1b-1c-ez-shift-mc-1-r-mr-jlm-marine","title":"26-32511A1 Upper Unit Seal Kit for Mercruiser Alpha One Gen I 1A 1B 1C EZ Shift MC-1 R MR | JLM Marine","description":"\u003ch2\u003eUpper Unit Seal Kit – Fits Mercruiser Alpha One Gen I, 1A, 1B, 1C, EZ Shift, MC-1, R, MR\u003c\/h2\u003e\n\n\u003cp\u003eThis upper unit seal kit is engineered to fit Mercruiser sterndrive upper units including Alpha One Gen I, 1A, 1B, 1C, EZ Shift, MC-1, R, and MR models. Designed to restore proper sealing and performance, this kit is essential for maintaining your sterndrive's reliability and preventing water intrusion.\u003c\/p\u003e\n\n\u003cp\u003eThis seal kit directly replaces \u003cstrong\u003eMercury Marine\/Quicksilver 26-32511A1\u003c\/strong\u003e, along with aftermarket equivalents \u003cstrong\u003eGLM 87500\u003c\/strong\u003e and \u003cstrong\u003eSierra Marine 18-2648\u003c\/strong\u003e, ensuring broad compatibility across sterndrive maintenance applications.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete seal kit for upper unit service and rebuild\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM and aftermarket part numbers\u003c\/li\u003e\n\u003cli\u003eSuitable for Mercruiser sterndrive applications\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 Marine\/Quicksilver\u003c\/td\u003e\n\u003ctd\u003e26-32511A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e87500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-2648\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\"\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\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003e1A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003e1B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003e1C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003eEZ Shift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003eMC-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003eR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003eMR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercruiser\u003c\/td\u003e\n\u003ctd\u003eAlpha One Gen I\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\"\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\u003e26-32511A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eUpper Unit Seal Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Drive Type\u003c\/td\u003e\n\u003ctd\u003eSterndrive\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 for upper unit service on compatible Mercruiser sterndrive models.\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 boat following manufacturer procedures.\u003c\/li\u003e\n\u003cli\u003eSeparate the upper unit from the lower unit by removing the retaining bolts.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the old seals from the upper unit housing, taking note of their positions and orientations.\u003c\/li\u003e\n\u003cli\u003eClean all seal surfaces thoroughly to remove old sealant, debris, and corrosion.\u003c\/li\u003e\n\u003cli\u003eInspect seal grooves and shafts for wear, scoring, or damage that could compromise new seals.\u003c\/li\u003e\n\u003cli\u003eLubricate the new seals with marine-grade grease before installation.\u003c\/li\u003e\n\u003cli\u003eInstall each new seal carefully, ensuring proper orientation and seating in the grooves.\u003c\/li\u003e\n\u003cli\u003eApply marine-grade sealant to mating surfaces as specified in your service manual.\u003c\/li\u003e\n\u003cli\u003eReassemble the upper and lower units, torquing all fasteners to manufacturer specifications.\u003c\/li\u003e\n\u003cli\u003eReinstall the sterndrive unit onto the boat and reconnect the shift and throttle cables.\u003c\/li\u003e\n\u003cli\u003eRefill the gear case with the correct type and quantity of gear lube, checking for leaks.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and perform a functional test before returning to service.\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 seal kit fits my Mercruiser sterndrive?\u003c\/strong\u003e\u003cbr\u003e\nA: Verify your sterndrive model against the compatibility table above. This kit fits Alpha One Gen I, 1A, 1B, 1C, EZ Shift, MC-1, R, and MR models. Cross-reference your existing OEM part number (26-32511A1) with the numbers listed to ensure a proper match.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my upper unit seals need replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include gear oil leaking from the upper unit, water contamination in the gear oil (milky appearance), visible seal damage during inspection, or difficulty shifting. If you notice any of these issues, inspect and replace the seals promptly to prevent further damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the upper unit seals?\u003c\/strong\u003e\u003cbr\u003e\nA: Seal replacement intervals depend on usage and operating conditions. Inspect seals during annual maintenance or gear oil changes. Replace seals if you notice leaks, during upper unit rebuilds, or every 3-5 years as preventive maintenance in high-use applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this seal kit myself or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: Installation requires mechanical aptitude, specialized tools, and knowledge of sterndrive systems. While experienced DIYers can perform this service with a proper manual and tools, professional installation is recommended to ensure correct assembly, torque specifications, and sealing.\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.\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","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51981037502777,"sku":"24SK445","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_67c34bf9-d6c0-4b89-aecd-61f0e6250577.jpg?v=1772447708","url":"https:\/\/jlmmarine.com\/ru\/products\/26-32511a1-upper-unit-seal-kit-for-mercruiser-alpha-one-gen-i-1a-1b-1c-ez-shift-mc-1-r-mr-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}