{"title":"Mercury 2-Stroke 4.5-25HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e3e3e3; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Mercury 2-Stroke 4.5–25HP outboard engines. Use it to find compatible parts and practical service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Mercury collection at any time. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0b5cab; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\"\u003e\n  \u003ch2\u003eHow to Identify Your 4.5–25HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eSerial\/nameplate location: typically on the lower starboard side of the powerhead and on the starboard side of the swivel bracket. Record the full serial number before ordering.\u003c\/li\u003e\n    \u003cli\u003eModel code and suffix: note shaft length (short\/long\/extra‑long), tiller vs. remote control, and starting system (manual\/electric). These suffixes affect cables, harnesses, and brackets.\u003c\/li\u003e\n    \u003cli\u003ePlatform differences: 4.5–8HP and 9.9–15HP small twins are carbureted 2‑strokes; later 9.9\/15 variants (e.g., Sailpower) may use different mid‑sections or charging options. Older 20–25HP 2‑strokes are also carbureted twins with different gearcase and cooling parts. Match parts by serial range.\u003c\/li\u003e\n    \u003cli\u003e2‑Stroke specifics: confirm premix or oil‑injection configuration, spark plug type\/heat range, and charging system (if equipped) in your service manual or serial‑specific parts list.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\"\u003e\n  \u003ch2\u003eEngine\/Platform Overview\u003c\/h2\u003e\n  \u003ch3\u003eSmall-Frame 4.5–8HP (Carbureted 2‑Stroke)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLightweight, carbureted 2‑stroke twin (some early low‑HP variants may differ). Manual or electric start depending on model.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e4.5\/6\/8HP 2‑stroke outboards across multiple serial ranges (tiller or remote).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePortable, simple to service, good low‑weight to power ratio.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarb, ignition, and cooling parts vary by year\/serial. Verify shaft length and control type when selecting cables and brackets.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMid-Frame 9.9–15HP (Carbureted 2‑Stroke)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarbureted 2‑stroke twin with shared architecture across 9.9\/10\/15HP families; manual or electric start; some models include charging coil and long‑shaft “Sailpower.”\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e9.9\/10\/15HP 2‑stroke variants; early vs. later serial ranges use different carb\/jetting and ignition parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eBroad parts availability, robust gearcases, easy seasonal service.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eMatch impeller, carb kits, and ignition components to the serial number. Prop pitch and shaft length vary by application.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e20–25HP (Carbureted 2‑Stroke)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarbureted 2‑stroke twin with heavier mid‑section and different gear ratio vs. small‑frame motors.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e20\/25HP 2‑stroke models across multiple serial breaks; remote or tiller variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eStronger thrust and load‑carrying capability while remaining service‑friendly.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWater pump, carburetor components, and sealing kits differ from 9.9–15HP families; confirm by serial number.\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\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general 2‑stroke guidelines; always follow your official Mercury service manual and your engine’s serial‑specific requirements, especially for earlier platforms and regional variants.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eDrain, inspect for water\/metal; replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 100 hours; replace as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eUse correct heat range and gap for your serial range; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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;\"\u003eInline\/fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect every 50–100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eDrain\/replace if water or debris is present; verify primer bulb and hoses are sound.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 2–3 seasons (or 300 hours)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace sooner if weak tell‑tale, overheat, or sandy\/silty use. Kit recommended for worn housings.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAnodes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect often; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eDo not paint anodes; essential for corrosion protection—especially in salt\/brackish water.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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;\"\u003ePropeller and hardware\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCheck each trip\/100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eRemove for fishing line checks; grease shaft; verify cotter\/lock hardware; pitch affects WOT RPM.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel\/oil mixture (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery refuel\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eTypical premix is 50:1 with NMMA TC‑W3 2‑stroke oil (after break‑in). Verify in your manual\/decals.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit seals (if water in oil)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAs needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eIf milky oil is found, pressure test and reseal the gearcase.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px; color:#666;\"\u003e*Intervals are typical for recreational use. Severe duty (heavy loads, sandy\/silty water, long idle time) may require shorter intervals.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service \u0026amp; Tune-Up: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System (impellers, pump kits): \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System (filters, carb items): \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 (props \u0026amp; hardware): \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase Sealing: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury 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\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWeak tell‑tale \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect intake screens for debris; verify strong tell‑tale; impeller age\/housing wear; thermostat sticking.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eWater pump repair kit, intake screen, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel quality; primer bulb firmness; filter contamination; prop pitch\/damage; spark plug condition; compression (baseline).\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel filter, spark plugs, propeller, carb kit (if needed)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eHard starting \/ rough idle (cold)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eChoke\/primer operation; idle mixture baseline; plug gap\/fouling; air leaks at fuel lines; stale fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eSpark plugs, fuel filter, carb components, primer\/choke parts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eExcessive blue smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eConfirm correct fuel\/oil ratio; flooded carb\/needle not seating; extended low‑speed operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eCarb needle\/seat kit, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect and change gear oil; check for water intrusion; prop shaft fishing line; pressure test gearcase.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit seal kit, prop hardware\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\"\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 components are shared, but many items (carb kits, ignition parts, water pump components, seals) change across serial ranges and between 4.5–8HP, 9.9–15HP, and 20–25HP families. Always match by serial number and configuration (shaft length, controls, start type).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, every 2–3 seasons or ~300 hours. Replace sooner if cooling flow is weak, the engine overheats, or the motor is used in sandy\/silty or weedy water.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eAt least annually or every 100 hours. If the oil appears milky (water contamination) or contains metal shavings, reseal and service the gearcase before further use.\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 serial number, horsepower, shaft length, start type (manual\/electric), tiller vs. remote control, and any accessories (charging system, Sailpower). 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; border:1px solid #e3e3e3; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year and model? Browse the main Mercury collection and use the filters to narrow results for your engine.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0b5cab; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; font-size:12px; color:#666;\"\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":"fuel-pump-fits-johnson-evinrude-4-5-25-hp-replaces-397839","title":"Fuel Pump – Fits Johnson\/Evinrude 4.5–15 HP 2-Stroke Outboards (Replaces 397839)","description":"\u003csection\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 aftermarket \u003cstrong\u003efuel pump\u003c\/strong\u003e is designed for selected Johnson\/Evinrude outboard motors in the 4.5–15 HP range. The documented application is for \u003cstrong\u003e2-stroke outboards manufactured from 1970 through 1992\u003c\/strong\u003e, including selected 6 HP, 8 HP, 9.9 HP, and 15 HP OMC\/BRP Marine applications.\u003c\/p\u003e\n\u003cp\u003eThis pump is supplied as a single replacement fuel-pump assembly. It is intended to replace the applicable original pump when the engine model, year, mounting arrangement, fuel-line connections, and original part number match.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket replacement for selected Johnson\/Evinrude outboard applications.\u003c\/li\u003e\n  \u003cli\u003eDesigned for 2-stroke outboard fuel systems.\u003c\/li\u003e\n  \u003cli\u003eApplicable power range: 4.5–15 HP, subject to the specific engine model and year.\u003c\/li\u003e\n  \u003cli\u003eSingle fuel-pump assembly; additional installation parts are not specified as included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the following manufacturer and aftermarket references to compare with the pump being replaced. Part-number references do not replace model-specific fitment verification.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand or Reference Type\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\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e397839\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e397274\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e395091\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e391638\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra aftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-7350\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMallory aftermarket reference\u003c\/td\u003e\n\u003ctd\u003e9-35350\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\u003eThe company fitment information identifies this pump for selected OMC\/BRP Marine Johnson\/Evinrude applications. Keep the horsepower, stroke, year, and original part number together when confirming compatibility.\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\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eReference Part Numbers\u003c\/th\u003e\n        \u003cth\u003eFitment Notes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003eSelected OMC\/BRP Marine outboards\u003c\/td\u003e\n        \u003ctd\u003e4.5–15 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1970–1992\u003c\/td\u003e\n        \u003ctd\u003e397839, 397274, 395091, 391638\u003c\/td\u003e\n        \u003ctd\u003eVerify the specific model and original pump before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n        \u003ctd\u003eSelected small outboard applications\u003c\/td\u003e\n        \u003ctd\u003e6 HP, 8 HP, 9.9 HP, 15 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1970–1992\u003c\/td\u003e\n        \u003ctd\u003e397839, 397274, 395091, 391638\u003c\/td\u003e\n        \u003ctd\u003eApplication coverage depends on the exact engine model and year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eNot documented for this product:\u003c\/strong\u003e 4-stroke engines, 20 HP or 25 HP applications, or Mercury-specific applications. Do not use this listing for those applications without separate, model-specific confirmation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eOutboard engine fuel pump\u003c\/dd\u003e\n  \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n  \u003cdd\u003eSingle replacement fuel-pump assembly\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Johnson\/Evinrude and OMC\/BRP Marine outboards\u003c\/dd\u003e\n  \u003cdt\u003eEngine Type\u003c\/dt\u003e\n  \u003cdd\u003e2-stroke outboards\u003c\/dd\u003e\n  \u003cdt\u003eRated Horsepower\u003c\/dt\u003e\n  \u003cdd\u003e4.5–15 HP, subject to model-specific fitment\u003c\/dd\u003e\n  \u003cdt\u003eDocumented Years\u003c\/dt\u003e\n  \u003cdd\u003e1970–1992\u003c\/dd\u003e\n  \u003cdt\u003eFuel\u003c\/dt\u003e\n  \u003cdd\u003eGasoline outboard fuel systems\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Type\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Fuel pump assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGaskets, cable ties, fuel hose, clamps, and other installation hardware are not specified as included. Reuse or purchase installation parts only after confirming the requirements of the specific engine.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery, place the engine in a well-ventilated area, and allow the engine to cool.\u003c\/li\u003e\n  \u003cli\u003eShut off the fuel supply and follow the engine manufacturer's procedure for relieving fuel-system pressure.\u003c\/li\u003e\n  \u003cli\u003eIdentify and mark the fuel-line connections before removing the original pump.\u003c\/li\u003e\n  \u003cli\u003eRemove the original pump and inspect the mounting surface, fuel lines, fittings, and mounting hardware.\u003c\/li\u003e\n  \u003cli\u003eCompare the replacement pump with the original part, including mounting points, ports, and hose routing.\u003c\/li\u003e\n  \u003cli\u003eInstall any required gasket or seal specified by the engine service documentation; no gasket is specified as included with this product.\u003c\/li\u003e\n  \u003cli\u003eMount the replacement pump and tighten fasteners according to the engine manufacturer's service specifications.\u003c\/li\u003e\n  \u003cli\u003eReconnect the fuel lines to the correct fittings and secure them properly.\u003c\/li\u003e\n  \u003cli\u003ePrime the fuel system, inspect all connections for leaks, and confirm correct operation before normal use.\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 that this fuel pump fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eConfirm that your engine is a Johnson\/Evinrude or OMC\/BRP Marine 2-stroke outboard in the documented 4.5–15 HP range and within the 1970–1992 application period. Then compare the original pump, mounting arrangement, fuel-line connections, and reference numbers such as 397839, 397274, 395091, or 391638. Exact model and year verification is recommended before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this pump for 2-stroke or 4-stroke engines?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for documented 2-stroke Johnson\/Evinrude applications. A 4-stroke application is not documented for this product.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this pump fit 20 HP or 25 HP engines?\u003c\/summary\u003e\n  \u003cp\u003eThe company fitment information documents applications up to 15 HP. Compatibility with 20 HP or 25 HP engines is not established for this product.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs a gasket included?\u003c\/summary\u003e\n  \u003cp\u003eNo gasket is specified as included. Check the engine service documentation and compare the original installation before ordering any required gasket or seal.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a failing outboard fuel pump?\u003c\/summary\u003e\n  \u003cp\u003ePossible symptoms include hard starting, stalling, hesitation, loss of power, surging, or poor operation at higher engine speed. Fuel-line leaks, tank-vent problems, filters, carburetor issues, and ignition faults can cause similar symptoms, so diagnose the complete fuel system before replacing the pump.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement fuel pump, not an original equipment manufacturer part.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWork only in a well-ventilated area away from flames, sparks, and other ignition sources.\u003c\/li\u003e\n  \u003cli\u003eFuel is flammable. Clean spilled fuel immediately and follow all applicable safety procedures.\u003c\/li\u003e\n  \u003cli\u003eVerify the engine model, year, stroke, horsepower, original part number, mounting points, and hose connections before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not assume compatibility based only on horsepower; model-specific variations may exist.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct fuel-system procedure or torque specification is unavailable.\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 — Replacement components for selected outboard and marine applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Use the documented model, year, horsepower, stroke, and part-number information to select the correct component.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePractical Support\u003c\/strong\u003e — Compare the original component and consult the engine service documentation before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723971268923,"sku":"24FP097","price":31.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/JLM24FP097-1_c8225628-cf06-4049-8c1e-28aedf9fe799.jpg?v=1763038824"}],"url":"https:\/\/seasierra.com\/collections\/mercury-2-stroke-4-5-25hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}