{"product_id":"carburetor-assembly-fits-yamaha-40hp-2-stroke-replaces-66t-14301-02-66t-14301-03","title":"Carburetor Assembly – Fits Yamaha 40HP 2-Stroke (Replaces 66T-14301-02, 66T-14301-03)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis is a complete \u003cstrong\u003eCarburetor Assembly – Fits Yamaha 40HP 2-Stroke Outboards (Replaces 66T-14301-02, 66T-14301-03)\u003c\/strong\u003e, designed for a wide range of Yamaha 40HP 2-stroke outboard motors manufactured between 1998 and 2012. It is engineered to fit models including the Enduro T30\/T40 series, E40X, E40XMH, and related variants, ensuring reliable fuel delivery and engine performance.\u003c\/p\u003e\n\u003cp\u003eThis assembly provides a direct interchange for Yamaha part numbers 66T-14301-00, 66T-14301-01, 66T-14301-02, and 66T-14301-03, as well as aftermarket equivalents Sierra 18-34605 and Mallory 9-34605.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003eDesigned for direct, bolt-on installation with no modifications required.\u003c\/li\u003e\n    \u003cli\u003eConstructed from a durable alloy housing to withstand the marine environment.\u003c\/li\u003e\n    \u003cli\u003eProduced in an ISO9002 certified facility for consistent quality and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-00\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by subsequent versions\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-01\u003c\/td\u003e\n        \u003ctd\u003eSuperseded by subsequent versions\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003ePrimary replacement\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-03\u003c\/td\u003e\n        \u003ctd\u003ePrimary replacement\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-34605\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-34605\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model and year range in the tables below to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003eThis carburetor is confirmed to fit a variety of Yamaha 40HP 2-Stroke engines. Please match your specific model and year.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\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\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e40X, 40XW\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1998–2000\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e40XMH\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003–2005\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e40XMH, XMHS, XMHL\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2009–2012\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eE40X, MLH\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1998–2000\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eE40X, XMH, XMHS, XMHL, MLHZ\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2001–2005\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eE40X, XMHS, XMHL, XMHX\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2006–2012\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT30\u003c\/td\u003e\n        \u003ctd\u003e30\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003eEnduro Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eT40\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e66T-14301-02\u003c\/td\u003e\n        \u003ctd\u003eEnduro Series\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eParsun\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e40\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003ePer JLM Marine\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eCarburetor Assembly\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n  \u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eGasoline\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eAlloy\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/Metallic\u003c\/dd\u003e\n  \u003cdt\u003eWarranty\u003c\/dt\u003e\n\u003cdd\u003eVaries by seller (typically 1 year)\u003c\/dd\u003e\n  \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eISO9002 certified production (per JLM Marine)\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1\u003c\/span\u003e x Carburetor Assembly (Replaces 66T-14301-02 \/ 66T-14301-03)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and shut off the fuel supply to the engine.\u003c\/li\u003e\n  \u003cli\u003eCarefully disconnect the fuel lines, throttle linkage, and any choke or electrical connections from the old carburetor. Label them to ensure correct reassembly.\u003c\/li\u003e\n  \u003cli\u003eRemove the nuts or bolts securing the carburetor to the intake manifold and carefully detach it.\u003c\/li\u003e\n  \u003cli\u003eClean the manifold mounting surface, ensuring it is free of old gasket material or debris.\u003c\/li\u003e\n  \u003cli\u003ePlace a new gasket (if not integrated) and mount the new carburetor assembly.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting nuts or bolts evenly to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel lines, throttle linkage, and any other connections removed in step 2.\u003c\/li\u003e\n  \u003cli\u003eTurn the fuel supply back on and check for any leaks.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery. Before starting, prime the fuel system if necessary.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and allow it to warm up. Check for smooth idling and throttle response. Minor idle speed or air\/fuel mixture adjustments may be necessary.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm this carburetor fits my specific engine?\u003c\/summary\u003e\n  \u003cp\u003eThe best way is to match your engine's model and year to the compatibility table. Additionally, compare the part numbers stamped on your original carburetor with those listed in our Part Number Matrix. Visual comparison with our product photos is also highly recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing outboard carburetor?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include difficulty starting, rough idling, stalling at low speeds, poor acceleration, increased fuel consumption, or fuel leaking from the carburetor body. These issues often arise from internal blockages, worn components, or improper float levels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill I need to tune or adjust this carburetor after installation?\u003c\/summary\u003e\n  \u003cp\u003eThis carburetor is designed to work out of the box for most listed applications. However, minor adjustments to the idle speed or air\/fuel mixture screws may sometimes be needed to achieve optimal performance for your specific engine and operating conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should a carburetor be serviced or replaced?\u003c\/summary\u003e\n  \u003cp\u003eService intervals depend heavily on fuel quality, usage, and storage habits. For preventative maintenance, cleaning the carburetor every 1-2 seasons is good practice. Replacement is typically only necessary when cleaning no longer resolves performance issues or when internal components are excessively worn.\u003c\/p\u003e\n\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. The unit is manufactured in an ISO 9002 facility and batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images and specifications against your original part before ordering. If anything differs—even if your model appears on our compatibility list—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is highly recommended for safety, performance, and to prevent damage to your engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions, with an average transit time of 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723966320955,"sku":"JLM17CA66T","price":98.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Carburetor_for_Yamaha_40HP__66T-14301_18-34605_-_JLM_MARINE-8285830.jpg?v=1763038625","url":"https:\/\/seasierra.com\/products\/carburetor-assembly-fits-yamaha-40hp-2-stroke-replaces-66t-14301-02-66t-14301-03","provider":"SeaSierra","version":"1.0","type":"link"}