{"title":"Mercury 100, 150, 200, 250 (1290910 THRU 1499331) Parts \u0026 Diagrams","description":"\u003cp\u003eOEM and aftermarket replacement parts for Mercury 100, 150, 200, 250. Scroll down for exploded parts diagrams (16), specifications, and maintenance reference.\u003c\/p\u003e","products":[{"product_id":"lower-unit-non-magnetic-oil-plug-for-mercury-mariner-outboard-and-mercruiser-sterndrive-79953q04","title":"Gearcase Drain Plug – Fits Mercury\/MerCruiser Marine Engines (Replaces 10-79953Q04, 79953Q04)","description":"\n\u003ch2\u003eGearcase Drain Plug – Fits Mercury\/MerCruiser Marine Engines (Replaces 10-79953Q04, 79953Q04)\u003c\/h2\u003e\n\n\u003cp\u003eThis gearcase drain and fill plug is designed for a wide range of Mercury outboard engines, including 30-125 HP EFI models, and various MerCruiser sterndrive units. It serves as a crucial component for draining and refilling gearcase lubricant in the lower unit.\u003c\/p\u003e\n\n\u003cp\u003eThis part is a direct replacement for Mercury part numbers \u003cstrong\u003e10-79953Q04, 79953Q04, 10-79953A2, 10-79953Q2\u003c\/strong\u003e and Sierra part number \u003cstrong\u003e18-2244\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation Method:\u003c\/strong\u003e Simple threaded screw-in installation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Constructed from durable brass for corrosion resistance in marine environments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e Includes the required sealing washer\/gasket for a leak-proof fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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\u003c\/td\u003e\n            \u003ctd\u003e10-79953Q04\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003e79953Q04\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003e10-79953A2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003e10-79953Q2\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSierra\u003c\/td\u003e\n            \u003ctd\u003e18-2244\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\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\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable\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\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003eEFI Outboards\u003c\/td\u003e\n            \u003ctd\u003e30, 40, 75, 80, 90, 115, 125\u003c\/td\u003e\n            \u003ctd\u003e3 Cyl EFI models\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\/MerCruiser\u003c\/td\u003e\n            \u003ctd\u003eVarious Sterndrive\/Outdrive\u003c\/td\u003e\n            \u003ctd\u003eN\/A\u003c\/td\u003e\n            \u003ctd\u003eUsed in gearcase\/lower unit\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\u003ctable\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\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eGearcase Drain\/Fill Plug\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eThreaded\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eConnection\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eLower Unit Gearcase\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eMetal (Brass)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eHousing Color\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eSilver\/Metallic\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eFitting Type\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eScrew with Gasket\/Seal\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cstrong\u003eOther Technical Attributes\u003c\/strong\u003e\u003c\/td\u003e\n            \u003ctd\u003eIncludes sealing washer\/gasket; used for both draining and filling gear oil in lower units\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e1 x Lower Unit Gear Lube Drain w\/Fill Hole Screw (79953Q04)\u003c\/li\u003e\n    \u003cli\u003e1 x \u003cspan style=\"color:red;\"\u003eSeal\/Gasket (included with assembly)\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003eLocate the gearcase drain\/fill plugs on the lower unit. There are typically two: an upper (vent) and a lower (drain).\u003c\/li\u003e\n    \u003cli\u003ePosition a suitable drain pan underneath the lower plug.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower drain plug using a large flathead screwdriver, allowing the old gear lube to drain completely.\u003c\/li\u003e\n    \u003cli\u003eRemove the upper vent plug to allow air to enter, which speeds up the draining process.\u003c\/li\u003e\n    \u003cli\u003eInspect the old plugs and magnetic tips for any metal shavings, which can indicate excessive gear wear.\u003c\/li\u003e\n    \u003cli\u003eClean the threads on the gearcase housing before installation.\u003c\/li\u003e\n    \u003cli\u003eInstall the new drain plug with its gasket in the lower hole and tighten it securely, but do not overtighten.\u003c\/li\u003e\n    \u003cli\u003eFill the gearcase with the manufacturer-specified lubricant through the upper vent hole until fluid begins to flow out.\u003c\/li\u003e\n    \u003cli\u003eInstall the new upper vent plug with its gasket and tighten securely.\u003c\/li\u003e\n    \u003cli\u003eClean any excess lubricant from the lower unit housing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this fits my engine?\u003c\/strong\u003e\u003cbr\u003e\nFirst, check your existing part for a part number and compare it to those listed in our cross-reference table. Second, review the compatible engine models table. For Mercury engines, use the provided \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 to confirm your model details.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this used for both draining and filling the gearcase?\u003c\/strong\u003e\u003cbr\u003e\nYes, this screw and seal assembly is used for both the lower drain hole and the upper vent\/fill hole on compatible Mercury and MerCruiser lower units.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the purpose of the included gasket?\u003c\/strong\u003e\u003cbr\u003e\nThe gasket (seal) is critical for preventing gear lube from leaking out and water from entering the gearcase. \u003cstrong\u003eAlways use a new gasket\u003c\/strong\u003e with each installation to ensure a proper seal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOEM vs. Aftermarket?\u003c\/strong\u003e\u003cbr\u003e\nThis 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\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nWe 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\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nThis 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\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\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\n\n","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":49546754785593,"sku":"22GK033","price":15.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Lower_Unit_Non-Magnetic_Oil_Plug_for_Mercury_Mariner_Outboard_and_MerCruiser_Sterndrive_______79953Q04_-_JLM_MARINE-8287053.jpg?v=1755052041"},{"product_id":"drain-screw-gasket-for-mercury-mercruiser-and-johnson-evinrude-lower-unit-12-19183","title":"Drain Screw Gasket for Mercury MerCruiser and Johnson Evinrude Lower Unit 12-19183","description":"\u003ch2\u003eDrain Screw Gasket – Fits Mercury MerCruiser \u0026amp; Johnson Evinrude Outboards\u003c\/h2\u003e\n\u003cp\u003eThis rubber-coated stainless steel washer forms a tear-resistant seal for the \u003cstrong\u003e3\/8-16 drain\/fill screw holes\u003c\/strong\u003e in outboard and stern drive gearcases. It is designed for use on a wide range of Mercury, MerCruiser, Johnson, and Evinrude marine engines, providing a reliable, leak-free fit without requiring compression.\u003c\/p\u003e\n\u003cp\u003eThis part directly replaces Mercury 12-19183Q02, 12-19183K02, 12-191833, 191832, 19183, 19183B, 20260B, 20260, F8186, F50556, F8077; Johnson Evinrude 307552, 300434; Sierra 18-2244, 18-2945, 18-29451-9; GLM 31170; Mallory 9-60101, 9-60102; and SEI Marine 98-102-09.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTear-Resistant Seal:\u003c\/strong\u003e Creates a durable seal for 3\/8-16 drain\/fill screw holes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Material:\u003c\/strong\u003e Made from high-quality, rubber-coated stainless steel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModern Design:\u003c\/strong\u003e The newer yellow design seals effectively without needing to be crushed like older fiber gaskets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable\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\u003e12-19183Q02, 12-19183K02, 12-191833, 191832, 19183, 19183B, 20260B, 20260, F8186, F50556, F8077\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson \/ Evinrude\u003c\/td\u003e\n\u003ctd\u003e307552, 300434\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-2244, 18-2945, 18-29451-9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e31170\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-60101, 9-60102\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSEI Marine\u003c\/td\u003e\n\u003ctd\u003e98-102-09\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\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 rel=\"nofollow noopener\" href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca rel=\"nofollow noopener\" href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\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 rel=\"nofollow noopener\" href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/johnson-serial-number-guide\" target=\"_blank\"\u003eJohnson\/Evinrude Serial Number Guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003ch3\u003eMercury\/MerCruiser\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable\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\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\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\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eOutboard Motors\u003c\/td\u003e\n\u003ctd\u003eAll*\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003e12-19183\u003c\/td\u003e\n\u003ctd\u003e*Except Japanese origin models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eOutboard Lower Units\u003c\/td\u003e\n\u003ctd\u003eAll*\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003e12-19183\u003c\/td\u003e\n\u003ctd\u003e*For 3\/8-16 drain\/fill screw holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003eAll Stern Drives\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003e12-19183\u003c\/td\u003e\n\u003ctd\u003eFor 3\/8-16 drain\/fill screw holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e4.3L, 5.0L, 5.7L, 6.2L\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003e12-19183\u003c\/td\u003e\n\u003ctd\u003eConfirmed fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e350, 377, 383 MPI\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003e12-19183\u003c\/td\u003e\n\u003ctd\u003eConfirmed fit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eJohnson\/Evinrude\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable\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\u003eStroke\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\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\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eOutboard Lower Units\u003c\/td\u003e\n\u003ctd\u003eAll*\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e307552\u003c\/td\u003e\n\u003ctd\u003e*For 3\/8-16 drain\/fill screw holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eMultiple Models\u003c\/td\u003e\n\u003ctd\u003e18-75 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n\u003ctd\u003e307552\u003c\/td\u003e\n\u003ctd\u003eUsed with compatible drain screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eChrysler\/Force\/US Marine\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable\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\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\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\u003eChrysler\/Force\/US Marine\u003c\/td\u003e\n\u003ctd\u003eOutboard Lower Units\u003c\/td\u003e\n\u003ctd\u003eAll*\u003c\/td\u003e\n\u003ctd\u003e2-Stroke \u0026amp; 4-Stroke\u003c\/td\u003e\n\u003ctd\u003eAll\u003c\/td\u003e\n\u003ctd\u003eF50556, F8077, F8186\u003c\/td\u003e\n\u003ctd\u003e*For 3\/8-16 drain\/fill screw holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eDrain\/Fill Screw Gasket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eUse with 3\/8-16 drain\/fill screw holes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Material\u003c\/td\u003e\n\u003ctd\u003eRubber-coated stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing Color\u003c\/td\u003e\n\u003ctd\u003eYellow (newer design) or Blue (older design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size\u003c\/td\u003e\n\u003ctd\u003e3\/8-16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther Technical Attributes\u003c\/td\u003e\n\u003ctd\u003eDesigned to form tear-resistant seal without requiring compression\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e12 x Drain Screw Gasket (\u003cspan style=\"color: red;\"\u003e12-19183Q02\u003c\/span\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eLocate the drain and fill screws on the lower unit gearcase. They are typically large, flathead screws.\u003c\/li\u003e\n\u003cli\u003ePosition a suitable drain pan under the lower screw (drain screw).\u003c\/li\u003e\n\u003cli\u003eRemove the top screw (vent screw) first, then remove the bottom drain screw to allow the oil to drain completely.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the old gasket from each screw. Clean the screw threads and the sealing surface on the gearcase.\u003c\/li\u003e\n\u003cli\u003eSlide the new gasket onto each screw.\u003c\/li\u003e\n\u003cli\u003eReinstall the bottom drain screw first and tighten until snug. \u003cstrong\u003eDo not overtighten.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFill the gearcase with the recommended lubricant through the bottom hole until it flows out of the top vent hole.\u003c\/li\u003e\n\u003cli\u003eReinstall the top vent screw and tighten securely. Wipe away any excess oil and inspect for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if this gasket will fit my engine?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: This gasket is designed for most Mercury, MerCruiser, Johnson, and Evinrude models with \u003cstrong\u003e3\/8-16 drain\/fill screw holes\u003c\/strong\u003e. The best way to confirm fitment is to check your OEM part number against the cross-reference list provided on this page. Also, verify your engine model is listed in the compatibility tables.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between the yellow gasket and the older blue ones?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: The \u003cstrong\u003eyellow gasket is a newer design\u003c\/strong\u003e made of a rubber-coated stainless steel that seals effectively without being crushed. The older style blue, orange, or black gaskets were a fiber design that required compression to create a seal and were typically single-use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace my drain screw gaskets?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It is highly recommended to \u003cstrong\u003ereplace the drain and fill screw gaskets every time you change your gearcase oil\u003c\/strong\u003e. This ensures a proper, leak-free seal and protects your engine's lower unit from water intrusion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: OEM vs. Aftermarket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: 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\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: 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\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: 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\u003ch2\u003eImportant Notes\u003c\/h2\u003e\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\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\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":49568093995321,"sku":"2151","price":12.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Drain_Screw_Gasket_for_Mercury_MerCruiser_and_Johnson_Evinrude_Lower_Unit________12-19183_-_JLM_MARINE-8287485.jpg?v=1755742140"}],"url":"https:\/\/jlmmarine.com\/collections\/mercury-100-150-200-250-sn-1290910.oembed","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}