{"title":"Quicksilver 2-Stroke 4HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page is dedicated to Quicksilver 2-Stroke 4HP outboard engines. Use it to find compatible parts and essential service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Quicksilver parts selection via our brand collection link. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #1b4; border-radius:6px; text-decoration:none;\"\u003eBrowse All Quicksilver Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 4HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/model plate on the transom bracket (typically on the clamp bracket or swivel bracket). Record model code, serial number, and any suffix letters.\u003c\/li\u003e\n    \u003cli\u003eModel suffixes often indicate shaft length (S\/L\/XL), starting method, and control type. Note these details before ordering parts.\u003c\/li\u003e\n    \u003cli\u003eConfirm it’s a 2‑Stroke: there’s no crankcase engine oil to change; lubrication comes from premix fuel or an oil‑injection system. If your engine has a dipstick and oil filter, it’s a 4‑Stroke.\u003c\/li\u003e\n    \u003cli\u003eMeasure propeller shaft spline count and note tiller vs. remote setup—useful when selecting propellers, fuel connections, and control components.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003ePortable 4HP Two‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCarbureted 2‑Stroke, lightweight portable outboard (commonly single‑ or twin‑cylinder, manual start, tiller steer).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eTypical 4HP 2‑Stroke models across major brands; verify your exact model code and serial to confirm parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eVery light, simple to service, strong low‑speed thrust for small boats and tenders.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eQuicksilver offers OEM‑quality service parts widely used across popular brands. Always match parts by model\/serial and dimensions (e.g., impeller size, plug type).\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for small 2‑Stroke portables. Always follow the official service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eChange before storage; inspect for water\/milky oil and metal on the drain plug magnet.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eShop compatible parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 50 hours; replace ~100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse the correct heat range and plug gap for your model.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filter \/ inline filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery season or 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace more often with stale fuel or debris; verify flow direction.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 2–3 seasons or 200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCritical for cooling; replace sooner if weak tell‑tale or overheating occurs.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 25–50 hours; replace when ~50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eChoose alloy for your water (zinc\/salt, aluminum\/brackish, magnesium\/fresh).\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e2‑Stroke oil mixing \/ oil injection check\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery fill‑up; pre‑season inspection\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse the manual‑specified ratio (commonly 50:1) or verify oil‑injection lines and pump operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/hoses\"\u003eHoses (oil\/fuel lines)\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service — \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System — \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System — \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical — \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion — \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection — \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eLower Unit Sealing — \u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect intake screen for blockage, verify tell‑tale hose is clear, assess impeller age.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWater pump kit, impeller, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck fuel freshness, prime bulb firmness, choke\/enrichment function, and plug condition\/gap.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs, fuel filter, carburetor kit, fuel hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect prop for damage or wrong pitch, look for fouled plugs, and confirm full throttle opening.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePropeller, spark plugs, fuel filter, ignition components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eVerify premix ratio; check oil‑injection settings\/lines if equipped; ensure warm‑up is complete.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs, fuel\/oil hoses, carburetor kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eGearcase noise \/ metal in oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eDrain gear oil and check for water\/metal; inspect prop shaft for fishing line; pressure test if needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eLower unit seal kit, bearings, gear lube\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or brands?\u003c\/summary\u003e\n    \u003cp\u003eSome service items are widely compatible, but fitment varies by model, serial, and platform. Always confirm dimensions and specifications for your exact 4HP 2‑Stroke model before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventive measure every 2–3 seasons (about 200 hours) or sooner if the tell‑tale weakens, the engine overheats, or you operated in sandy\/weedy water.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange at least annually or every 100 hours, and always before winter storage. Inspect the drained oil for water contamination and metal particles.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat details help confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model code, serial number, shaft length, and any noted modifications. Photos of the nameplate and the part being replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find the right components? Browse our brand collection to view Quicksilver-compatible parts by horsepower, year, and model.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #1b4; border-radius:6px; text-decoration:none;\"\u003eBrowse All Quicksilver Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;font-size:0.95em;color:#333;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"carburetor-assembly-fits-mercury-mariner-4-5hp-2-stroke-outboards-replaces-812648t-3303-812648t","title":"Aftermarket Carburetor Assembly for Mercury\/Mariner 4–5 HP 2-Stroke Outboards – Replaces 812648T, 812648 and 3303-812648T","description":"\u003cstyle\u003e.ss-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}table.ss-table{width:100%;border-collapse:collapse;min-width:640px}table.ss-table th,table.ss-table td{padding:10px 12px;border:1px solid #e5e7eb;text-align:left;vertical-align:top}table.ss-table th{white-space:nowrap;word-break:normal;letter-spacing:normal;font-weight:600;background:#f8fafc}@media(max-width:480px){table.ss-table th,table.ss-table td{padding:8px 10px;font-size:14px}}\u003c\/style\u003e\u003csection\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ecarburetor assembly\u003c\/strong\u003e is intended as a replacement for selected Mercury, Mariner and Quicksilver 4–5 HP two-stroke outboard applications. The listed applications cover models manufactured from approximately 1987 through 2006, subject to the model, year and serial-number conditions shown below.\u003c\/p\u003e\n\u003cp\u003eUse the part number and engine-identification information to confirm compatibility before ordering. This assembly is listed as a replacement for Mercury part numbers \u003cstrong\u003e812648T\u003c\/strong\u003e and \u003cstrong\u003e812648\u003c\/strong\u003e, and Mercury\/Quicksilver reference \u003cstrong\u003e3303-812648T\u003c\/strong\u003e. Tohatsu reference \u003cstrong\u003e369-03200-2\u003c\/strong\u003e is provided as a cross-reference only and should be verified against the specific Tohatsu engine.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement carburetor assembly for selected 4–5 HP two-stroke outboards.\u003c\/li\u003e\n\u003cli\u003eDesigned around the listed OEM mounting and connection configuration.\u003c\/li\u003e\n\u003cli\u003eZinc-alloy housing intended for use in a marine environment.\u003c\/li\u003e\n\u003cli\u003eConfirm the original carburetor number, model, horsepower, stroke and serial range before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following numbers are customer-facing OEM or manufacturer reference numbers associated with this replacement listing.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e812648\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3303-812648T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuicksilver\u003c\/td\u003e\n\u003ctd\u003e3303-812648T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e369-03200-2 — cross-reference only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eEngine and Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eFitment depends on the complete engine configuration. Match the brand, model or model family, rated horsepower, two-stroke configuration, year and serial range where applicable. A part-number match is helpful but does not replace verification of the complete engine identification.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Mercury Mariner and Quicksilver Engine Compatibility\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYear or Serial Condition\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004137\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004207\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004227\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004201BK\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004211BK\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1004216BK\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1005201BK\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e1005211BK\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\/Quicksilver\u003c\/td\u003e\n\u003ctd\u003e4 HP models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1989–2006; model suffixes may vary\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eVerify the exact model and serial number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\/Quicksilver\u003c\/td\u003e\n\u003ctd\u003e5 HP models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1989–2006; model suffixes may vary\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eVerify the exact model and serial number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4 HP models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0G710613–0T894438\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4 HP models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0P017000–0P400999\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4 HP models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0P401000 and later\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4 HP models\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0T894439 and later\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e5 HP models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0G710613–0T894438\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e5 HP models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0P017000–0P400999\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e5 HP models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0P401000 and later\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e5 HP models\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSerial 0T894439 and later\u003c\/td\u003e\n\u003ctd\u003e812648T\u003c\/td\u003e\n\u003ctd\u003eCarburetor application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp\u003eFor a Tohatsu application, the reference number \u003cstrong\u003e369-03200-2\u003c\/strong\u003e should be treated as a lead for verification rather than confirmation of every 4–5 HP two-stroke model.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Tohatsu Compatibility Reference\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eFitment Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003eSelected compatible models\u003c\/td\u003e\n\u003ctd\u003e4–5\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e369-03200-2\u003c\/td\u003e\n\u003ctd\u003eCross-reference only; verify the exact model and serial number\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eCarburetor assembly\u003c\/dd\u003e\n\u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected 4–5 HP two-stroke outboard engines\u003c\/dd\u003e\n\u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eReplacement installation using the listed OEM-style mounting configuration\u003c\/dd\u003e\n\u003cdt\u003eFuel Type\u003c\/dt\u003e\n\u003cdd\u003eGasoline for two-stroke outboard applications\u003c\/dd\u003e\n\u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eZinc alloy\u003c\/dd\u003e\n\u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\u003c\/dd\u003e\n\u003cdt\u003eReference Numbers\u003c\/dt\u003e\n\u003cdd\u003e812648T, 812648, 3303-812648T and Tohatsu 369-03200-2 cross-reference\u003c\/dd\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement, not an OEM-branded component\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003e1 × Carburetor assembly\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003eGaskets, hoses, linkages and other installation hardware are not listed as included components unless specifically shown with the item. Reuse or replace these parts as required for the particular engine.\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eShut off the fuel supply and disconnect the fuel line from the existing carburetor.\u003c\/li\u003e\n\u003cli\u003eRecord the position of the throttle linkage and choke mechanism, then disconnect them carefully.\u003c\/li\u003e\n\u003cli\u003eRemove the nuts or bolts securing the old carburetor to the engine.\u003c\/li\u003e\n\u003cli\u003eRemove the old carburetor and gasket. Clean the intake mounting surface and remove remaining gasket material.\u003c\/li\u003e\n\u003cli\u003eInstall a suitable new gasket if the original gasket is not reusable.\u003c\/li\u003e\n\u003cli\u003ePosition the replacement carburetor on the mounting studs or bolts and tighten the fasteners evenly to the engine manufacturer's specification. Do not overtighten.\u003c\/li\u003e\n\u003cli\u003eReconnect the throttle linkage and choke mechanism, checking that they move smoothly without binding.\u003c\/li\u003e\n\u003cli\u003eReconnect the fuel line and inspect the connection.\u003c\/li\u003e\n\u003cli\u003eTurn on the fuel supply and check carefully for leaks before starting the engine.\u003c\/li\u003e\n\u003cli\u003eAfter installation, follow the engine service manual for idle-speed, mixture and operating adjustments.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting and FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm that this carburetor fits my engine?\u003c\/summary\u003e\u003cp\u003eCompare the number on the existing carburetor with 812648T, 812648 or 3303-812648T, then confirm the engine brand, model, horsepower, two-stroke configuration, year and serial range. For a Tohatsu engine, verify the complete application rather than relying only on the 369-03200-2 cross-reference.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat symptoms can indicate a carburetor problem?\u003c\/summary\u003e\u003cp\u003eHard starting, rough idle, stalling, poor acceleration, excessive smoke and fuel leakage can be associated with carburetor problems. Fuel-system contamination, damaged gaskets, blocked passages and ignition issues can produce similar symptoms, so inspect the complete system before replacing parts.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill adjustment be required after installation?\u003c\/summary\u003e\u003cp\u003eA replacement carburetor may require idle-speed or mixture adjustment depending on the specific engine and operating conditions. Follow the engine manufacturer's service procedure and do not change factory settings unnecessarily.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs this an OEM carburetor?\u003c\/summary\u003e\u003cp\u003eNo. This listing is for an aftermarket replacement assembly. The OEM and manufacturer reference numbers are provided for identification and compatibility comparison only.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs the Tohatsu reference a guaranteed fit?\u003c\/summary\u003e\u003cp\u003eNo. Tohatsu 369-03200-2 is shown as a cross-reference. Confirm the exact Tohatsu model, year, serial number and original carburetor configuration before ordering.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat maintenance is recommended?\u003c\/summary\u003e\u003cp\u003eUse fresh, clean fuel, keep the fuel system free of contamination and inspect fuel lines and connections regularly. For extended storage, follow the engine manufacturer's fuel-stabilization and carburetor-draining procedure.\u003c\/p\u003e\u003c\/details\u003e\u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify the original part number and complete engine identification before purchase.\u003c\/li\u003e\n\u003cli\u003eDo not rely on horsepower alone; model, year, stroke and serial conditions must be considered together.\u003c\/li\u003e\n\u003cli\u003eInspect the carburetor, gasket surfaces, fuel line and connections for leaks before operating the engine.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement and is not an OEM-branded component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when the correct adjustment or service procedure is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — Marine replacement parts selected for dependable fit and service use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Practical replacement solutions for maintaining marine equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-Focused Support\u003c\/strong\u003e — Use the part-number and engine-identification details above to verify compatibility before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723969237307,"sku":"07-M6FG-X9UK","price":50.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/07-M6FG-X9UK.png?v=1763038753"}],"url":"https:\/\/seasierra.com\/collections\/quicksilver-2-stroke-4hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}