{"title":"Yamaha 2-Stroke Outboard Engine Parts (4-350HP)","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px; max-width:1000px;\"\u003e\n  \u003cp\u003eThis page covers Yamaha 2‑Stroke 4–350HP outboard engines and helps you quickly find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yamaha collection for a wider parts selection. Scroll to the bottom of this page to start browsing parts for this engine, and when you land on the collection, 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\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 16px; background:#0b5cab; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 2‑Stroke 4–350HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial sticker on the transom or swivel bracket. It lists the model code, serial number, and horsepower rating.\u003c\/li\u003e\n    \u003cli\u003eRead the model code and suffix: letters typically indicate shaft length (S\/L\/XL), control type (tiller vs. remote), and sometimes production revision or year code. Suffix changes can affect parts compatibility.\u003c\/li\u003e\n    \u003cli\u003eConfirm oiling type: many Yamaha 2‑strokes are oil‑injected with a remote tank and small inline oil filter; others are pre‑mix. The oiling system type influences maintenance items.\u003c\/li\u003e\n    \u003cli\u003eNote platform cues: compact portables (small cowling, 1–2 cyl), mid‑range (often inline platforms), and larger high‑output models (bigger gearcases and cowlings). Platform differences can change impeller size, ignition components, and fuel system parts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"platforms\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003ePortable 2‑Stroke (Approx. 4–15HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eLightweight 2‑stroke portable platforms (single or twin‑cylinder, carbureted).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eSmall 4–15HP 2‑stroke variants used on tenders, inflatables, and small skiffs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eVery light, easy to service, strong low‑end thrust for size.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck shaft length (S\/L). Impellers, spark plugs, and carb settings are platform‑specific; verify with model code.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMid‑Range 2‑Stroke (Approx. 20–90HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInline carbureted 2‑stroke platforms; many are oil‑injected with remote tanks and inline oil filters.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003ePopular 40–90HP classes for bay boats, jons, and light center consoles.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eGood power‑to‑weight, simple fuel systems, responsive mid‑range torque.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCarb jetting\/links and gearcase sizes vary by HP and year; match parts to the exact model suffix.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eHigh‑Output 2‑Stroke (Approx. 115–300HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eLarger 2‑stroke platforms including carb\/EFI and high‑pressure direct injection (HPDI) variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eOffshore‑capable 115–300HP classes for heavier hulls and multi‑species fishing.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eHigh power density with strong top‑end; HPDI improves fuel economy and emissions vs. carb setups.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eHPDI fuel pumps and filters are unique to that system. Gearcase, water pump, and ignition parts differ by year\/HP—confirm with the model code and suffix.\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; max-width:1000px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Yamaha 2‑stroke outboards. Always follow the official service manual for your exact model and usage conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInspect for water (milky oil) or metal; reseal if contamination is present.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInspect every 50 hours; replace ~100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eCheck heat range and gap per model; fouling indicates fuel or oiling issues.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\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:8px; border-bottom:1px solid #f1f5f9;\"\u003eFuel filter \/ water separator (inline or under‑cowl)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eReplace more often with ethanol fuel or dirty tanks; prime system after service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\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:8px; border-bottom:1px solid #f1f5f9;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eEvery 2 years or 200 hours (yearly in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eWeak telltale or overheat alarm often indicates wear; inspect housing and key.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eAnodes (internal \u0026amp; external)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInspect each service; replace at ~50% depletion\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eMatch alloy to water type (salt\/brackish\/fresh) and keep mounting points clean.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003e2‑stroke oil system service (oil‑injected models)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eSeasonally or every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInspect\/replace small inline oil filter, check remote tank, lines, and prime pump.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eFuel\/oil mix (pre‑mix models)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEach refuel\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eUse the ratio specified in your manual (commonly 50:1 with TC‑W3 oil) and fresh gasoline.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\"\u003eYamaha Outboard Parts\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; max-width:1000px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha 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\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-starters\"\u003eYamaha Starters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \/ Sealing – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px; max-width:1000px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; padding:8px; border-bottom:1px solid #e5e7eb;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eWeak telltale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eInspect intake screens for debris; verify impeller and housing; check thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eWater pump kit, intake screen, thermostat, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eConfirm clean fuel and proper venting; replace fuel filter; inspect plugs; check prop condition\/pitch.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eFuel filters, spark plugs, carburetor components, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003ePrime bulb and check for air leaks; verify choke\/enricher; clean carbs; inspect plug gap\/condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eFuel hose\/primer, carb kits, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eVerify oil injection setting or pre‑mix ratio; ensure choke isn’t sticking; use fresh fuel\/oil.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f1f5f9;\"\u003eHoses, oil system filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eDrain and inspect oil; check for water intrusion; evaluate shaft seals and bearing condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\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; max-width:1000px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome common service items may cross over, but many components differ by horsepower, platform, and model suffix. Always match parts to the exact model code and serial range for best results.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule, every 2 years or ~200 hours, and yearly if you run sandy or shallow water. Replace sooner if you see weak telltale flow or any overheat condition.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange at least annually or every 100 hours. If the engine has been submerged or you find milky oil or metal, service immediately and inspect seals and bearings.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model code and suffix from the nameplate, serial number, shaft length, control type (tiller\/remote), and a brief description of the symptom or service being performed.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb; max-width:1000px;\"\u003e\n  \u003cp\u003eReady to find the right parts? Browse the main Yamaha collection by horsepower, year, and model.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 16px; background:#0b5cab; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#475569;\"\u003eIf you’re unsure about your model, send us a clear photo of the nameplate and the part you need—we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"5-16-fuel-line-assembly-fits-yamaha-outboard-motors-4-350-hp-replaces-6y1-24306-55","title":"5\/16\" (8 mm) × 7.5 ft Fuel Line Assembly with Connectors for Yamaha Outboards – OEM Reference 6Y2-24306","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\u003e5\/16\" (8 mm) × 7.5 ft fuel line assembly with connectors\u003c\/strong\u003e is intended for Yamaha outboard fuel-system applications. It provides a replacement line for connecting a compatible portable fuel tank and outboard engine. The assembly is supplied with connectors and uses a 5\/16-inch (8 mm) line diameter.\u003c\/p\u003e\n\u003cp\u003eThe company catalog identifies Yamaha OEM reference \u003cstrong\u003e6Y2-24306\u003c\/strong\u003e for this product. Confirm the connector style, hose diameter, length, and engine requirements before ordering.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e7.5-foot replacement fuel line assembly.\u003c\/li\u003e\n\u003cli\u003e5\/16-inch (8 mm) fuel-line size.\u003c\/li\u003e\n\u003cli\u003eSupplied with compatible end connectors.\u003c\/li\u003e\n\u003cli\u003eDesigned for external fuel-tank-to-outboard connections.\u003c\/li\u003e\n\u003cli\u003eAftermarket replacement; not manufactured by Yamaha.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePart Number Reference\u003c\/h2\u003e\n\u003cp\u003eUse the following reference when comparing this assembly with your original fuel line.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Part Number Reference\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference Type\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003ctd\u003e6Y2-24306\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis fuel line assembly is cataloged for Yamaha outboard applications. Exact fitment depends on the engine connection, fuel-tank connection, hose size, and routing. Yamaha model, year, horsepower, stroke, shaft length, and serial-number fitment were not specified in the company catalog, so verify those details against your engine and the original assembly before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\u003ctable class=\"ss-table\" aria-label=\"Compatibility Information\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eHose Size\u003c\/th\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003cth\u003eOEM Reference\u003c\/th\u003e\n\u003cth\u003eFitment Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003eYamaha Outboard\u003c\/td\u003e\n\u003ctd\u003eExternal fuel-tank-to-outboard connection\u003c\/td\u003e\n\u003ctd\u003e5\/16 in (8 mm)\u003c\/td\u003e\n\u003ctd\u003e7.5 ft\u003c\/td\u003e\n\u003ctd\u003e6Y2-24306\u003c\/td\u003e\n\u003ctd\u003eVerify the connector style and specific engine\/tank requirements before installation.\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\u003eFuel line assembly with connectors\u003c\/dd\u003e\n\u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eYamaha outboard fuel-system connection\u003c\/dd\u003e\n\u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eExternal, portable fuel tank to outboard engine\u003c\/dd\u003e\n\u003cdt\u003eHose Size\u003c\/dt\u003e\n\u003cdd\u003e5\/16 inch (8 mm)\u003c\/dd\u003e\n\u003cdt\u003eLength\u003c\/dt\u003e\n\u003cdd\u003e7.5 ft\u003c\/dd\u003e\n\u003cdt\u003eOEM Reference\u003c\/dt\u003e\n\u003cdd\u003eYamaha 6Y2-24306\u003c\/dd\u003e\n\u003cdt\u003eProduct Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement, not an OEM Yamaha component\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 5\/16-inch (8 mm) × 7.5 ft fuel line assembly\u003c\/li\u003e\n\u003cli\u003eConnectors supplied as part of the assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTurn the engine off, allow it to cool, and work in a well-ventilated area away from sparks, flames, and other ignition sources.\u003c\/li\u003e\n\u003cli\u003eConfirm that the replacement line diameter, length, and connectors match the original assembly and the fuel tank and engine fittings.\u003c\/li\u003e\n\u003cli\u003eDisconnect the existing line from the fuel tank and outboard engine according to the manufacturer's service instructions.\u003c\/li\u003e\n\u003cli\u003eConnect the replacement assembly to the fuel tank and engine. Make sure each connector is fully seated and locked.\u003c\/li\u003e\n\u003cli\u003eRoute the line away from sharp edges, hot surfaces, moving parts, and areas where it can be pinched.\u003c\/li\u003e\n\u003cli\u003eBefore starting the engine, inspect the complete line and both connection points for leaks. Do not operate the engine if leakage, loose connections, swelling, cracking, or other damage is present.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm that this fuel line is suitable for my Yamaha outboard?\u003c\/summary\u003e\u003cp\u003eCheck that your original line uses a 5\/16-inch (8 mm) hose and that the tank-side and engine-side connectors match. Also compare the required length and consult the engine or fuel-system service information for your specific model and serial number.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the length and diameter of this assembly?\u003c\/summary\u003e\u003cp\u003eThe company specification is 7.5 ft in length with a 5\/16-inch (8 mm) fuel-line size.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this product include connectors?\u003c\/summary\u003e\u003cp\u003eYes. The company catalog identifies this product as a fuel line set with connectors, and the connectors are supplied as part of the assembly.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement assembly. Yamaha 6Y2-24306 is provided as the OEM reference for comparison and fitment checking.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat should I do if the connectors do not match?\u003c\/summary\u003e\u003cp\u003eDo not force or modify the connection. Stop installation and compare the original connector style, hose size, and engine and tank fittings with the product specifications. Use the manufacturer's service information or consult a qualified marine technician if needed.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhen should a fuel line be replaced?\u003c\/summary\u003e\u003cp\u003eInspect the line regularly and replace it if you find cracking, hardening, swelling, abrasion, fuel odor, leakage, damaged connectors, or other signs of deterioration. Follow the maintenance guidance for your engine and fuel system.\u003c\/p\u003e\u003c\/details\u003e\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFuel is flammable. Work in a well-ventilated area with the engine stopped and away from ignition sources.\u003c\/li\u003e\n\u003cli\u003eVerify the hose diameter, 7.5-foot length, connector style, and engine-specific requirements before purchase.\u003c\/li\u003e\n\u003cli\u003eDo not use the assembly if any part is damaged or if a connection leaks.\u003c\/li\u003e\n\u003cli\u003eThis is an aftermarket replacement and is not an OEM Yamaha component.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when you are uncertain about fuel-system connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Practical replacement components for routine boat and outboard maintenance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product details are provided to help you compare dimensions, connectors, and reference numbers before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupport for Fitment Checks\u003c\/strong\u003e — Verify your original part and engine details before installation for the best result.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723976282427,"sku":"21FL801","price":37.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/65_FT_5-16_Inch_Fuel_Line_for_Yamaha_4-350_HP__6Y1-24306-55_-_JLM_MARINE-8287021.jpg?v=1763039021"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-2-stroke-outboard-engine-parts-4-350hp.oembed","provider":"SeaSierra","version":"1.0","type":"link"}