{"product_id":"carburetor-rebuild-kit-fits-mercury-mariner-40-150-hp-replaces-1395-5109-1-18-7021","title":"Carburetor Rebuild Kit – Fits Mercury\/Mariner 40-150 HP (Replaces 1395-5109-1, 18-7021)","description":"\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\u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis comprehensive \u003cstrong\u003eCarburetor Rebuild Kit – Fits Mercury\/Mariner 40-150 HP\u003c\/strong\u003e provides all essential components to restore a single carburetor on 2-stroke outboard engines from 1976–1990 with specific WMK series designations. It ensures your engine receives the correct fuel-air mixture for reliable performance.\u003c\/p\u003e\n    \u003cp\u003eIt serves as a direct interchange for Mercury part 1395-5109-1, Sierra 18-7021, GLM 40480, and Pro Marine 7021.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eDesigned for a direct replacement of OEM service components.\u003c\/li\u003e\n        \u003cli\u003eIncludes all necessary gaskets, seals, and a needle valve for a complete overhaul of one carburetor.\u003c\/li\u003e\n        \u003cli\u003eNote: Three kits are required to service engines with a three-carburetor setup.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n    \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109 \/ 1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eSierra\u003c\/td\u003e\n                    \u003ctd\u003e18-7021\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eGLM\u003c\/td\u003e\n                    \u003ctd\u003e40480\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003ePro Marine\u003c\/td\u003e\n                    \u003ctd\u003e7021\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n    \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n    \u003cp\u003eThis kit is compatible with specific Mercury and Mariner outboard engines equipped with WMK-series carburetors manufactured between 1976 and 1990.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK series 1.8, 21, 24, 31, 33, 34, 38\u003c\/td\u003e\n                    \u003ctd\u003e40\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 8\u003c\/td\u003e\n                    \u003ctd\u003e50\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 5, 12, 13, 20\u003c\/td\u003e\n                    \u003ctd\u003e65 (650)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 4, 16, 17\u003c\/td\u003e\n                    \u003ctd\u003e85 (850)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 23, 27, 30, 35, 39\u003c\/td\u003e\n                    \u003ctd\u003e90 (900)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 3, 10, 15, 18, 26, 28, 32, 36, 40, 41\u003c\/td\u003e\n                    \u003ctd\u003e115 (1150)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 4\u003c\/td\u003e\n                    \u003ctd\u003e135 (1350)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 7, 9, 25, 29\u003c\/td\u003e\n                    \u003ctd\u003e140 (1400)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr\u003e\n                    \u003ctd\u003eMercury\u003c\/td\u003e\n                    \u003ctd\u003eWMK 11, 14, 19, 22\u003c\/td\u003e\n                    \u003ctd\u003e150 (1500)\u003c\/td\u003e\n                    \u003ctd\u003e2-Stroke\u003c\/td\u003e\n                    \u003ctd\u003e1976–1990\u003c\/td\u003e\n                    \u003ctd\u003e1395-5109-1\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n    \u003cdl\u003e\n        \u003cdt\u003eProduct Type\u003c\/dt\u003e\n        \u003cdd\u003eCarburetor Rebuild Kit\u003c\/dd\u003e\n        \u003cdt\u003eInstallation\u003c\/dt\u003e\n        \u003cdd\u003eDirect replacement for OEM service\u003c\/dd\u003e\n        \u003cdt\u003eFuel Type\u003c\/dt\u003e\n        \u003cdd\u003eGasoline\u003c\/dd\u003e\n        \u003cdt\u003eWeight\u003c\/dt\u003e\n        \u003cdd\u003e21 g (0.74 oz)\u003c\/dd\u003e\n        \u003cdt\u003ePackage Dimensions\u003c\/dt\u003e\n        \u003cdd\u003e18 × 15 × 2 cm\u003c\/dd\u003e\n        \u003cdt\u003eWarranty\u003c\/dt\u003e\n        \u003cdd\u003e1-year against manufacturing defects\u003c\/dd\u003e\n    \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003eComplete rebuild kit for a \u003cspan style=\"color:#d0021b;\"\u003esingle carburetor\u003c\/span\u003e.\u003c\/li\u003e\n        \u003cli\u003ePremium gaskets and O-rings\u003c\/li\u003e\n        \u003cli\u003eNeedle valve assembly\u003c\/li\u003e\n        \u003cli\u003eFloat pivot pin\u003c\/li\u003e\n        \u003cli\u003eOther essential small components for service (contents may vary slightly by manufacturer)\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003eEnsure the engine is off and the fuel supply is shut off before beginning work. Work in a well-ventilated area.\u003c\/li\u003e\n        \u003cli\u003eCarefully remove the carburetor(s) from the engine, noting the location of all linkages and fuel lines.\u003c\/li\u003e\n        \u003cli\u003eDisassemble the carburetor, cleaning all metal components with a dedicated carburetor cleaner. Do not use cleaner on rubber or plastic parts.\u003c\/li\u003e\n        \u003cli\u003eSystematically replace old gaskets, seals, and the needle valve with the new components from the kit.\u003c\/li\u003e\n        \u003cli\u003eReassemble the carburetor, ensuring the float is set to the manufacturer's specified height.\u003c\/li\u003e\n        \u003cli\u003eReinstall the carburetor(s) on the engine. For engines with multiple carburetors, it is recommended to service all at the same time. \u003cspan style=\"color:#d0021b;\"\u003eNote: Three kits are required to rebuild all carburetors on a 3-carburetor engine.\u003c\/span\u003e\n\u003c\/li\u003e\n        \u003cli\u003eAfter installation, check for leaks and adjust the idle and mixture screws as necessary.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow many kits do I need for my engine?\u003c\/summary\u003e\n        \u003cp\u003eEach kit services one carburetor. If your engine has multiple carburetors (e.g., many inline-6 models), you will need to purchase one kit per carburetor for a complete overhaul.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eDoes this kit fit all Mercury\/Mariner engines from 40-150 HP?\u003c\/summary\u003e\n        \u003cp\u003eNo. This kit is specifically for models from 1976–1990 that use WMK-series carburetors. Please verify your carburetor model number or check our compatibility table to ensure a match.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs my carburetor needs to be rebuilt?\u003c\/summary\u003e\n        \u003cp\u003eCommon symptoms include hard starting, rough idling, stalling, poor acceleration, black smoke from the exhaust, or fuel leaking from the carburetor body. These indicate that internal seals have degraded or passages are clogged.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eDoes this kit include a new float?\u003c\/summary\u003e\n        \u003cp\u003eThis kit includes the float pivot pin and needle valve assembly, but not the float itself. Floats are typically sold separately as they are not always required for a standard rebuild.\u003c\/p\u003e\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). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, 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 5–15 days. Standard shipping is free; expedited options 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\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n    \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n    \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n        \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n        \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\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 tested for real-world conditions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718262493499,"sku":"24CR431","price":26.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Carburetor_Repair_Kit_for_Mercury_40-150HP_1395-5109_1_18-7021_-_JLM_MARINE-8290593.jpg?v=1763038905","url":"https:\/\/seasierra.com\/products\/carburetor-rebuild-kit-fits-mercury-mariner-40-150-hp-replaces-1395-5109-1-18-7021","provider":"SeaSierra","version":"1.0","type":"link"}