{"product_id":"65l-14984-00-vst-float-chamber-gasket-for-mercury-mariner-yamaha-jlm-marine","title":"65L-14984-00 VST Float Chamber Gasket for Mercury Mariner Yamaha | JLM Marine","description":"\u003cbody\u003e\n\n\n\u003cmeta charset=\"UTF-8\"\u003e\n\n\n\n\u003ch2\u003e65L-14984-00 VST Float Chamber Gasket for Mercury Mariner Yamaha | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eVST Float Chamber Gasket (O-Ring)\u003c\/strong\u003e is designed for \u003cstrong\u003eMercury, Mariner, and Yamaha\u003c\/strong\u003e outboard engines ranging from \u003cstrong\u003e150 HP to 300 HP\u003c\/strong\u003e. It ensures a reliable seal for the VST (Vapor Separator Tank) float chamber, preventing fuel leaks and maintaining optimal fuel system performance.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly crosses to multiple OEM part numbers, including \u003cstrong\u003e65L-14984-00-00, 18-0715, 809086, and 25-809086\u003c\/strong\u003e, providing a cost-effective solution for fuel system maintenance across Mercury, Mariner, and Yamaha platforms.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eDirect replacement for OEM VST float chamber gaskets\u003c\/li\u003e\n\u003cli\u003eSuitable for 6-cylinder 76-degree V-block Yamaha engines (200–250 HP models)\u003c\/li\u003e\n\u003cli\u003eEssential component for fuel system integrity and leak prevention\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\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e65L-14984-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e25-809086\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e809086\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAftermarket\u003c\/td\u003e\n\u003ctd\u003e18-0715\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e65L-14984-00-00\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 Yamaha owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha 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\" 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\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMariner\u003c\/td\u003e\n\u003ctd\u003eALL\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eALL\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6 Cyl 3.544 Bore 76 Degree 200\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6 Cyl 3.544 Bore 76 Degree 225\u003c\/td\u003e\n\u003ctd\u003e1997-1998\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6 Cyl 3.544 Bore 76 Degree 250\u003c\/td\u003e\n\u003ctd\u003e1997-1998\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\" 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\u003ePart Type\u003c\/td\u003e\n\u003ctd\u003eVST Float Chamber Gasket (O-Ring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eVapor Separator Tank (VST) Seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Brands\u003c\/td\u003e\n\u003ctd\u003eMercury, Mariner, Yamaha\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHP Range\u003c\/td\u003e\n\u003ctd\u003e150 - 300 HP\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 package includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 x VST Float Chamber O-Ring Gasket\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eThe package contains all the parts shown in the product images.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and relieve fuel system pressure before beginning work. Ensure the work area is well-ventilated and free from ignition sources.\u003c\/li\u003e\n\u003cli\u003eLocate the VST (Vapor Separator Tank) assembly on your outboard engine. Remove any covers or components obstructing access.\u003c\/li\u003e\n\u003cli\u003eCarefully disconnect fuel lines from the VST float chamber, using a rag to catch any residual fuel.\u003c\/li\u003e\n\u003cli\u003eRemove the retaining screws or clamps securing the VST float chamber cover.\u003c\/li\u003e\n\u003cli\u003eLift off the float chamber cover and inspect the old O-ring gasket for damage or wear.\u003c\/li\u003e\n\u003cli\u003eClean the mating surfaces of both the cover and the chamber body thoroughly, removing all old gasket material and debris.\u003c\/li\u003e\n\u003cli\u003ePosition the new VST O-ring gasket into the designated groove on the float chamber or cover. Ensure it seats evenly without twisting.\u003c\/li\u003e\n\u003cli\u003eReinstall the float chamber cover, aligning it carefully with the chamber body.\u003c\/li\u003e\n\u003cli\u003eTighten the retaining screws or clamps in a cross-pattern to the manufacturer's specified torque to ensure even pressure.\u003c\/li\u003e\n\u003cli\u003eReconnect fuel lines securely, ensuring all connections are tight and properly seated.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and turn the ignition to the \"on\" position to prime the fuel system. Check for leaks around the newly installed gasket.\u003c\/li\u003e\n\u003cli\u003eStart the engine and allow it to run at idle, inspecting the VST area for any signs of fuel seepage or leaks.\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 gasket fits my specific engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your original part number with the numbers listed in our Part Number Cross-Reference table above. Also verify your engine model and year in the Compatible Engine Models section. If your model is listed and the part number matches, this gasket will fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the VST float chamber gasket?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace the gasket whenever you service the VST assembly, or if you notice fuel odors, leaks, or hard starting issues. As a preventive measure, inspect the gasket annually and replace it every 2-3 years or sooner if it shows signs of hardening, cracking, or fuel degradation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my VST gasket is failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include fuel odor around the VST area, visible fuel weeping from the float chamber seam, difficulty starting the engine, rough idle, or fuel pressure inconsistencies. If you experience any of these issues, inspect and replace the gasket as needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gasket if it looks okay?\u003c\/strong\u003e\u003cbr\u003e\nA: No, it is not recommended. O-ring gaskets compress and conform to mating surfaces over time, and reusing them can result in improper sealing and fuel leaks. Always install a new gasket when reassembling the VST float chamber.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or an aftermarket replacement?\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\n\n\n\u003c\/body\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51983453585721,"sku":"3509","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_6a952c7f-d92e-4710-b93d-bd0f55eb7274.jpg?v=1772505163","url":"https:\/\/jlmmarine.com\/ru\/products\/65l-14984-00-vst-float-chamber-gasket-for-mercury-mariner-yamaha-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}