{"product_id":"carburetor-fits-mercury-mariner-10hp-15hp-20hp-4-stroke-replaces-853720t14-853720t15-853720t19-853720t21-8m0109535","title":"Carburetor – Fits Mercury Mariner 10HP 15HP 20HP 4-stroke (Replaces 853720T14, 853720T15, 853720T19, 853720T21, 8M0109535)","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\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  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\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 \u003cstrong\u003eCarburetor – Fits Mercury Mariner 10HP 15HP 20HP 4-stroke\u003c\/strong\u003e is designed for Mercury Mariner outboard engines rated 15HP–20HP with 4-stroke, 2-cylinder configuration. Engineered to deliver reliable fuel metering for remote-control models with serial numbers 0R235168 through 0R833819 (carburetor serial 0R686020 and below).\u003c\/p\u003e\n\u003cp\u003eDirect replacement for OEM part numbers 853720T14, 853720T15, 853720T19, 853720T21, and 8M0109535.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete carburetor assembly ready for installation\u003c\/li\u003e\n  \u003cli\u003eCompatible with remote-control Mercury Mariner 4-stroke outboards\u003c\/li\u003e\n  \u003cli\u003eFits 2-cylinder engines in the 10HP–20HP range\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.\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\u003e853720T14\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e853720T15\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e853720T19\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e853720T21\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e8M0109535\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\/year in the table below.\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\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eConfiguration\u003c\/th\u003e\n        \u003cth\u003eSerial Range\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 Mariner\u003c\/td\u003e\n        \u003ctd\u003e15HP–20HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2CYL\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eRemote models\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e20HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2CYL\u003c\/td\u003e\n        \u003ctd\u003e0R235168–0R833819\u003c\/td\u003e\n        \u003ctd\u003eCarburetor 0R686020 and below\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e15HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2CYL\u003c\/td\u003e\n        \u003ctd\u003e0R235949–0R833819\u003c\/td\u003e\n        \u003ctd\u003eCarburetor 0R686020 and below\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e15HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2CYL\u003c\/td\u003e\n        \u003ctd\u003e0R558208–0R833819\u003c\/td\u003e\n        \u003ctd\u003eJCI \/ Carburetor 0R686020 and below\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e10HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2CYL\u003c\/td\u003e\n        \u003ctd\u003e0R575531–0R833819\u003c\/td\u003e\n        \u003ctd\u003eCarburetor 0R686020 and below\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\u003eType\u003c\/dt\u003e\n  \u003cdd\u003eCarburetor Assembly\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eMercury Mariner 4-stroke outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eHP Range\u003c\/dt\u003e\n  \u003cdd\u003e10HP, 15HP, 20HP\u003c\/dd\u003e\n  \u003cdt\u003eStroke\u003c\/dt\u003e\n  \u003cdd\u003e4-Stroke\u003c\/dd\u003e\n  \u003cdt\u003eCylinder Configuration\u003c\/dt\u003e\n  \u003cdd\u003e2-Cylinder\u003c\/dd\u003e\n  \u003cdt\u003eControl Type\u003c\/dt\u003e\n  \u003cdd\u003eRemote models\u003c\/dd\u003e\n  \u003cdt\u003eOEM Equivalent\u003c\/dt\u003e\n  \u003cdd\u003e853720T15, 853720T21, 8M0109535\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × Carburetor 853720T15\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and fuel line before beginning work.\u003c\/li\u003e\n  \u003cli\u003eRemove the engine cover and locate the existing carburetor assembly.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the throttle linkage, choke cable, and fuel supply line from the old carburetor.\u003c\/li\u003e\n  \u003cli\u003eUnbolt the carburetor from the intake manifold using the appropriate socket or wrench.\u003c\/li\u003e\n  \u003cli\u003eInspect the intake manifold gasket and replace if damaged or worn.\u003c\/li\u003e\n  \u003cli\u003ePosition the new carburetor onto the manifold, ensuring proper alignment of mounting holes.\u003c\/li\u003e\n  \u003cli\u003eSecure with bolts and tighten evenly in a criss-cross pattern to the manufacturer's torque specification.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel line, throttle linkage, and choke cable in reverse order of removal.\u003c\/li\u003e\n  \u003cli\u003eDouble-check all connections for tightness and proper routing.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and perform a fuel system prime if equipped with a primer bulb.\u003c\/li\u003e\n  \u003cli\u003eStart the engine and allow it to idle, checking for fuel leaks and smooth operation.\u003c\/li\u003e\n  \u003cli\u003eAdjust idle speed and mixture settings as needed per the engine service manual.\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 engine?\u003c\/summary\u003e\n  \u003cp\u003eCross-reference your engine's serial number with the compatibility table above. Check the carburetor serial plate on your current unit; it should be 0R686020 or below. If your engine falls within the 0R235168–0R833819 range and is a 4-stroke 2-cylinder remote model rated 10HP–20HP, this carburetor is a direct fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs my carburetor needs replacement?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include rough idling, difficulty starting, poor acceleration, black smoke from the exhaust, fuel leaks around the carburetor body, or an engine that stalls frequently. If cleaning and rebuilding the existing carburetor does not resolve these issues, replacement is recommended.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I use this on a tiller-handle Mercury?\u003c\/summary\u003e\n  \u003cp\u003eThis carburetor is specified for remote-control models. Tiller-handle variants may have different throttle linkage configurations or fuel delivery systems. Verify your engine's catalog number and carburetor serial before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need to adjust the carburetor after installation?\u003c\/summary\u003e\n  \u003cp\u003eYes, most carburetors require idle speed and mixture adjustments after installation. Consult your Mercury service manual for the correct procedure and specification values. Fine-tuning ensures optimal fuel efficiency and engine performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the difference between the various OEM part numbers listed?\u003c\/summary\u003e\n  \u003cp\u003eThe part numbers 853720T14, 853720T15, 853720T19, 853720T21, and 8M0109535 represent different production batches or supersessions by Mercury. All are functionally interchangeable for the engines listed in the compatibility table.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this work with ethanol-blended fuel?\u003c\/summary\u003e\n  \u003cp\u003eThis carburetor is designed to handle modern fuel formulations, including ethanol blends up to E10. For best results, use fresh fuel, add a marine-grade fuel stabilizer, and drain the carburetor if storing the engine for extended periods.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications against 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","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":51025605656891,"sku":"23CA483","price":88.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Carburetor_for_Johnson_Evinrude_15HP__5040597_-_JLM_MARINE-8288132.jpg?v=1772928042","url":"https:\/\/seasierra.com\/products\/carburetor-fits-mercury-mariner-10hp-15hp-20hp-4-stroke-replaces-853720t14-853720t15-853720t19-853720t21-8m0109535","provider":"SeaSierra","version":"1.0","type":"link"}