{"title":"Tohatsu 4-Stroke 4-5HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page is dedicated to Tohatsu 4-Stroke 4–5HP outboard engines. Use it to find compatible parts and practical service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Tohatsu collection at any time. Scroll to the bottom of the page to start browsing parts for this engine, and remember you can use the “Filter \u0026amp; Sort” controls on the collection page to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a4;border-radius:4px;text-decoration:none;\"\u003eBrowse All Tohatsu 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 4–5HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eFind the nameplate\/serial label on the transom bracket or swivel bracket. It lists the model (e.g., MFS4 or MFS5) and serial number.\u003c\/li\u003e\n    \u003cli\u003eModel code suffixes indicate shaft length and options: S\/L for short\/long shaft, and E for electric start where applicable.\u003c\/li\u003e\n    \u003cli\u003eThese portable 4–5HP engines are 4‑stroke and carbureted. Confirm you are not looking at a 2‑stroke legacy model, as parts differ.\u003c\/li\u003e\n    \u003cli\u003eCheck the cowling decal and carburetor style; 4‑stroke MFS4\/MFS5 share many service parts with the MFS6 platform, but verify by serial.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eTohatsu MFS4\/MFS5 Portable 4‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:100%;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;\"\u003eSingle‑cylinder, carbureted 4‑stroke, CDI ignition, manual or optional electric start\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;\"\u003eMFS4, MFS5 (S\/L shaft variants); many service parts overlap with MFS6\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;\"\u003eLightweight, fuel‑efficient, simple maintenance, reliable low‑speed torque for trolling and dinghy duty\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;\"\u003eCarbureted models are sensitive to stale fuel—keep filters clean and use fresh fuel. Water pump service is key for cooling performance.\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 portable 4‑stroke outboards. Always follow the official service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:100%;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;\"\u003eEngine oil (and filter\/screen)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInitial 20 hrs; then every 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eMost 4–6HP models use a strainer rather than a spin‑on filter; change oil more often in harsh use.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\"\u003eTohatsu Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\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 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect for water intrusion and metal on the drain plug magnet; replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\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 100 hrs; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSet to the specified gap; fouling often indicates rich idle or stale fuel.\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 strainer\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace or clean more often when using portable tanks or if ethanol fuel is stored.\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 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCritical for cooling; replace sooner if weak tell‑tale or after sand\/silt operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-water-pump-repair-kits\"\u003eTohatsu Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAnodes (internal \u0026amp; external)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 50 hrs; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEssential for corrosion protection, especially in brackish\/salt water.\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    \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\/tohatsu-water-pump-repair-kits\"\u003eTohatsu Water Pump Repair Kits\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\u003eCarburetion — \u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetors\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition — \u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eLower Unit — \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-lower-unit-seal-kits\"\u003eTohatsu Lower Unit Seal Kits\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  \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:100%;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 or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect intake screen for debris; verify impeller condition; check thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eWater pump kit, impeller, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConfirm fresh fuel and open tank vent; check fuel filter\/strainer and carb jets; inspect spark plug.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filter, carburetor kit, spark plug\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eVerify choke\/enrichment function; drain old fuel; clean idle circuit; check for air leaks on fuel line.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCarburetor components, fuel connector\/line, spark plug\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect gear oil level\/condition; check for water intrusion; evaluate prop shaft seal area.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eLower unit seal kit, gear oil (service)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eLow‑oil warning or engine stops when tilted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConfirm crankcase oil level and correct engine trim angle; avoid overfilling.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEngine oil service, breather inspection\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 between MFS4, MFS5, and MFS6?\u003c\/summary\u003e\n    \u003cp\u003eMany routine service parts overlap across these portable platforms, but jetting, gearing, and certain gaskets can differ by model, year, and shaft length. Verify by model and serial number 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 rule of thumb, replace every 2–3 seasons or ~200 hours, and sooner after sandy\/silty use or any overheat event.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eEvery 100 hours or annually. If you find milky oil or metal particles, service seals and re‑inspect after short use.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the complete model code, serial number, shaft length (S\/L), and any options (manual vs. electric start). Photos of the nameplate and the old part 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 parts by horsepower and model? Browse our main Tohatsu collection and use the filters to narrow by engine family and category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/tohatsu-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a4;border-radius:4px;text-decoration:none;\"\u003eShop Tohatsu Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#444;\"\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-fits-tohatsu-nissan-4-5-hp-4-stroke-replaces-3r1-03200-1-18-7608","title":"Replacement Carburetor for Tohatsu\/Nissan 4–5 HP 4-Stroke Outboards — Replaces 3R1-03200-1, Sierra 18-7608","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\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 replacement \u003cstrong\u003ecarburetor assembly\u003c\/strong\u003e is intended for selected Tohatsu and Nissan 4-stroke outboard engines in the 4–5 HP range. It is listed as a replacement for Tohatsu part number \u003cstrong\u003e3R1-03200-1\u003c\/strong\u003e and Sierra reference \u003cstrong\u003e18-7608\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFitment can vary by model, production year, market and serial-number range. Before ordering, compare the part number on your original carburetor and confirm the complete engine model details against the compatibility information below.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket replacement carburetor assembly.\u003c\/li\u003e\n  \u003cli\u003eDesigned for direct replacement of the corresponding original assembly when the part-number and engine details match.\u003c\/li\u003e\n  \u003cli\u003eSuitable for gasoline-powered marine outboard applications covered by the confirmed fitment.\u003c\/li\u003e\n  \u003cli\u003eCarburetor assembly only; gasket and other installation hardware are not included unless specifically stated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe references below identify the replacement application. Part-number matching alone does not confirm every model, year or serial-number range.\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\u003eReference Type\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003e3R1-03200-1\u003c\/td\u003e\n        \u003ctd\u003eOriginal-equipment reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-7608\u003c\/td\u003e\n        \u003ctd\u003eAftermarket 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\u003eThis replacement is associated with selected Tohatsu and Nissan 4-stroke outboards in the 4–5 HP class. Use the original carburetor number and the engine identification label to confirm fitment before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel Family\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eFitment Condition\u003c\/th\u003e\n        \u003cth\u003eReference Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eTohatsu\u003c\/td\u003e\n        \u003ctd\u003eSelected 4–5 HP models\u003c\/td\u003e\n        \u003ctd\u003e4–5 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eConfirm model, year and serial number\u003c\/td\u003e\n        \u003ctd\u003e3R1-03200-1\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNissan\u003c\/td\u003e\n        \u003ctd\u003eSelected 4–5 HP models\u003c\/td\u003e\n        \u003ctd\u003e4–5 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003eConfirm model, year and serial number\u003c\/td\u003e\n        \u003ctd\u003e3R1-03200-1\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\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected gasoline outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eEngine Class\u003c\/dt\u003e\n  \u003cdd\u003e4–5 HP\u003c\/dd\u003e\n  \u003cdt\u003eEngine Type\u003c\/dt\u003e\n  \u003cdd\u003e4-Stroke\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement when fitment is confirmed\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n  \u003cdd\u003eDirect mount\u003c\/dd\u003e\n  \u003cdt\u003eIncluded Gasket\u003c\/dt\u003e\n  \u003cdd\u003eNot included\u003c\/dd\u003e\n  \u003cdt\u003ePart-Number References\u003c\/dt\u003e\n  \u003cdd\u003eTohatsu 3R1-03200-1; Sierra 18-7608\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 x\u003c\/span\u003e Carburetor assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA mounting gasket, fuel-line components and adjustment tools are not included unless separately specified. Inspect the original hardware and replace worn or damaged sealing components as required.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eReview the engine service information and verify the replacement part number before beginning work.\u003c\/li\u003e\n  \u003cli\u003eTurn off the fuel supply, disconnect the battery if applicable, and work in a well-ventilated area away from ignition sources.\u003c\/li\u003e\n  \u003cli\u003eRemove the air-intake components as required to access the carburetor.\u003c\/li\u003e\n  \u003cli\u003eLabel or photograph the throttle linkage, choke control and fuel-line positions before disconnecting them.\u003c\/li\u003e\n  \u003cli\u003eRemove the original carburetor and discard the old gasket if it is damaged or specified as single-use.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surfaces and install the replacement using a suitable gasket in good condition.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel line, throttle linkage and choke control, then check that each moves freely.\u003c\/li\u003e\n  \u003cli\u003ePrime the fuel system, start the engine in accordance with the manufacturer’s procedure, and inspect carefully for fuel leaks.\u003c\/li\u003e\n  \u003cli\u003eSet idle speed or other adjustments only as specified in the applicable service information.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm that this carburetor fits my engine?\u003c\/summary\u003e\u003cp\u003eMatch the number on your original carburetor to Tohatsu 3R1-03200-1 or Sierra 18-7608, then confirm the engine brand, model, horsepower, 4-stroke configuration, year and serial-number range. If any of these details differ, obtain confirmation before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this listing include a gasket?\u003c\/summary\u003e\u003cp\u003eNo. This listing is for the carburetor assembly only. A gasket may need to be purchased separately unless your existing gasket is approved for reuse and remains undamaged.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this carburetor fit a 6 HP outboard?\u003c\/summary\u003e\u003cp\u003eDo not assume compatibility with a 6 HP engine. The listed application is selected 4–5 HP 4-stroke outboards. A 6 HP engine should be treated as unconfirmed unless its exact model and original part number match the replacement application.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat symptoms can indicate a carburetor problem?\u003c\/summary\u003e\u003cp\u003ePossible symptoms include hard starting, unstable idle, stalling, hesitation during acceleration, poor running under load, excessive fuel use and fuel leakage. These symptoms can also result from fuel contamination, ignition faults, restricted fuel delivery or incorrect adjustment.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill adjustment be required after installation?\u003c\/summary\u003e\u003cp\u003eFollow the applicable engine service procedure. Idle or mixture adjustment may be required, but do not change settings beyond the manufacturer’s specified range.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM carburetor?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement. It is intended to replace the corresponding original assembly when the part number and engine fitment are confirmed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should a carburetor be replaced?\u003c\/summary\u003e\u003cp\u003eThere is no universal replacement interval. Regular fuel-system maintenance can help prevent deposits and corrosion. Replace the carburetor when cleaning and approved servicing cannot restore proper operation, or when the assembly is damaged or leaking.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat should I do if the part does not match my original?\u003c\/summary\u003e\u003cp\u003eDo not force installation or modify the mounting, linkage or fuel connections. Compare the part number and engine identification details, and contact support before installation if the configuration does not match.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the original part number and complete engine identification before purchase.\u003c\/li\u003e\n  \u003cli\u003eUse only in the application for which fitment has been confirmed.\u003c\/li\u003e\n  \u003cli\u003eGasoline is flammable. Work in a ventilated area, keep the part away from flames and relieve fuel-system hazards before removal.\u003c\/li\u003e\n  \u003cli\u003eInspect all fuel connections after installation and stop immediately if leakage is observed.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when you are not familiar with marine fuel systems or carburetor adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We supply replacement components for a range of marine service applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Verify the complete engine and part-number details before installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport for Installation Questions\u003c\/strong\u003e — Contact support if the replacement does not match the original configuration or application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723963797819,"sku":"JLM19CA3R1","price":58.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Carburetor_for_Tohatsu_Nissan_4_5_HP__3R1-03200-1_18-7365_-_JLM_MARINE-8285955_bc95a394-8f8c-4740-b350-35d1b5c2a060.jpg?v=1763038513"}],"url":"https:\/\/seasierra.com\/collections\/tohatsu-4-stroke-4-5hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}