{"product_id":"0396349-lower-unit-seal-kit-for-johnson-evinrude-jlm-marine","title":"0396349 Lower Unit Seal Kit for Johnson Evinrude | JLM Marine","description":"\u003ch2\u003eLower Unit Seal Kit for Johnson Evinrude Outboards – 0396349\u003c\/h2\u003e\n\n\u003cp\u003eThis lower unit seal kit is engineered to fit a wide range of Johnson and Evinrude outboard motors, including \u003cstrong\u003e40–75 HP 3-cylinder models (1975–2001)\u003c\/strong\u003e and \u003cstrong\u003e40–60 HP E-TEC engines (2004–2008)\u003c\/strong\u003e. Designed to restore watertight integrity to your gearcase, this kit provides reliable protection against water intrusion and oil leakage in demanding marine environments.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly crosses to \u003cstrong\u003eOMC 0396349, 5000309, 0777558\u003c\/strong\u003e, \u003cstrong\u003eSierra 18-2660\u003c\/strong\u003e, \u003cstrong\u003eGLM 87601\u003c\/strong\u003e, and \u003cstrong\u003eMallory 9-74103\u003c\/strong\u003e, ensuring broad compatibility across OEM and aftermarket service parts.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eComplete seal kit for lower unit gearcase service\u003c\/li\u003e\n  \u003cli\u003eFits both standard 3-cylinder and E-TEC models\u003c\/li\u003e\n  \u003cli\u003eDirect cross-reference to multiple OEM and aftermarket part numbers\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\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n      \u003ctd\u003e5000309\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n      \u003ctd\u003e0396349\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n      \u003ctd\u003e0777558\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eGLM\u003c\/td\u003e\n      \u003ctd\u003e87601\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMallory\u003c\/td\u003e\n      \u003ctd\u003e9-74103\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSierra\u003c\/td\u003e\n      \u003ctd\u003e18-2660\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 Johnson\/Evinrude owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/johnson-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eJohnson\/Evinrude Serial Number Guide\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\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003eE-TEC\u003c\/td\u003e\n        \u003ctd\u003e40 HP\u003c\/td\u003e\n        \u003ctd\u003e2004–2008\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003eE-TEC\u003c\/td\u003e\n        \u003ctd\u003e50 HP\u003c\/td\u003e\n        \u003ctd\u003e2004–2008\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003eE-TEC\u003c\/td\u003e\n        \u003ctd\u003e60 HP\u003c\/td\u003e\n        \u003ctd\u003e2004–2008\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003e3 Cylinder\u003c\/td\u003e\n        \u003ctd\u003e50 HP\u003c\/td\u003e\n        \u003ctd\u003e1995–2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003e3 Cylinder\u003c\/td\u003e\n        \u003ctd\u003e60 HP\u003c\/td\u003e\n        \u003ctd\u003e1975–2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003e3 Cylinder\u003c\/td\u003e\n        \u003ctd\u003e65 HP\u003c\/td\u003e\n        \u003ctd\u003e1975–2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003e3 Cylinder\u003c\/td\u003e\n        \u003ctd\u003e70 HP\u003c\/td\u003e\n        \u003ctd\u003e1975–2001\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003e3 Cylinder\u003c\/td\u003e\n        \u003ctd\u003e75 HP\u003c\/td\u003e\n        \u003ctd\u003e1975–2001\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\u003e0396349, 18-2660\u003c\/td\u003e\n    \u003c\/tr\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\u003eFitment\u003c\/td\u003e\n      \u003ctd\u003eJohnson\/Evinrude 40–75 HP Outboards\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:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e\u003cstrong\u003e1 x Lower Unit Seal Kit (all seals as shown in product image)\u003c\/strong\u003e\u003c\/span\u003e\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 remove the propeller for safety.\u003c\/li\u003e\n  \u003cli\u003eDrain all gear oil from the lower unit and clean the exterior surfaces.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit from the motor following your service manual instructions.\u003c\/li\u003e\n  \u003cli\u003eDisassemble the gearcase, keeping track of shims and bearing positions.\u003c\/li\u003e\n  \u003cli\u003eRemove all old seals, O-rings, and gaskets from the housing and shafts.\u003c\/li\u003e\n  \u003cli\u003eClean all seal surfaces thoroughly with marine-grade solvent and inspect for damage.\u003c\/li\u003e\n  \u003cli\u003eLubricate new seals with marine grease and install them carefully using the correct drivers.\u003c\/li\u003e\n  \u003cli\u003eReassemble the gearcase, ensuring proper shimming and bearing preload per service specifications.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit onto the motor and torque all fasteners to manufacturer specs.\u003c\/li\u003e\n  \u003cli\u003eRefill with the correct grade and quantity of lower unit gear oil.\u003c\/li\u003e\n  \u003cli\u003eCheck for leaks by running the motor in a test tank or on muffs for several minutes.\u003c\/li\u003e\n  \u003cli\u003eReinstall the propeller and perform a water test under normal operating conditions.\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 Johnson or Evinrude engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Check the Compatible Engine Models table above for your HP rating and year range. You can also verify by cross-referencing your original OEM part number (0396349, 5000309, 0777558) or aftermarket equivalents (Sierra 18-2660, GLM 87601, Mallory 9-74103) against this kit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my lower unit seals?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace seals whenever you service the lower unit, typically every 2–3 years or 100–200 hours of operation, or immediately if you notice milky gear oil or signs of water intrusion.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my lower unit seals are failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include milky or discolored gear oil, excessive oil consumption, water in the gearcase, unusual noise or vibration from the lower unit, and visible oil leaks around the propeller shaft or shift shaft.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse old seals during lower unit service?\u003c\/strong\u003e\u003cbr\u003e\nA: No. Seals are designed for single use and lose their sealing ability once removed. Always install new seals during gearcase service to prevent leaks and potential damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. 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":51981023052089,"sku":"24OSK709","price":42.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/c99c7ff1cf550687.jpg?v=1772414758","url":"https:\/\/jlmmarine.com\/products\/0396349-lower-unit-seal-kit-for-johnson-evinrude-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}