{"title":"Mercury Mercruiser 4-Stroke 320HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px; max-width:980px;\"\u003e\n  \u003cp\u003eThis page is for Mercury MerCruiser 4‑Stroke 320HP sterndrive engines. Use it to find compatible parts and service information, including maintenance tips, commonly replaced items, and troubleshooting guidance. You can also browse the main MerCruiser collection. 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.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0d6efd; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All MerCruiser Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px; max-width:980px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 320HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate serial tags: engine serial is typically on a decal near the throttle body\/ECM or starboard side of the block; the drive (Alpha\/Bravo) serial is on the transom assembly\/drive housing.\u003c\/li\u003e\n    \u003cli\u003eModel wording: common 320HP variants include V8 platforms such as 377 MAG MPI (earlier) or 6.2L ECT (newer, with catalyst). The model label often lists displacement, emission family, and drive pairing.\u003c\/li\u003e\n    \u003cli\u003eDrive identification: Alpha models pair with lower outputs; most 320HP engines are matched to Bravo One\/Two\/Three drives. Confirm your exact drive to ensure propeller, anode, and seal compatibility.\u003c\/li\u003e\n    \u003cli\u003eCooling type: raw-water vs. closed-cooling (heat exchanger). Thermostats, anodes, pump style, and some hoses differ—verify your cooling configuration before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px; max-width:980px;\"\u003e\n  \u003ch2\u003eEngine Platform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eV8 377 MAG MPI (320 HP)\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;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eV8, multi-port fuel injection 4‑stroke, often paired with Bravo drives\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e377 MAG MPI 320; Bravo One\/Two\/Three applications\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong mid‑range torque, proven EFI reliability, broad parts availability\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eVerify raw‑water vs. closed‑cooling, and drive type for anodes, impellers, and prop fitment\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV8 6.2L ECT (320 HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:10px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eV8, EFI 4‑stroke with Emissions Control Technology (catalyst), typically with Bravo drives\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e6.2L 320 ECT; Bravo One\/Two\/Three variations\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eImproved fuel economy, cleaner emissions, refined calibration and diagnostics\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eMany service parts interchange with earlier V8s, but emissions and cooling components may differ—confirm by serial\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:980px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for recreational use; always follow the official MerCruiser service manual for your exact model and duty cycle.\u003c\/p\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;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; 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\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eWarm engine before draining; use marine‑rated oil and replace crush seals as required\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-oil-filters\"\u003eMerCruiser Oil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eDrive gear oil (Alpha\/Bravo)\u003c\/td\u003e\n        \u003ctd\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect for water intrusion and metal; pressure test if contamination is found\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-service-maintenance-kits\"\u003eMerCruiser Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003e300 hours or 3 years\u003c\/td\u003e\n        \u003ctd\u003eCheck gap and heat range; replace earlier if fouling occurs\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plug\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eDrain and inspect for water; replace element and bowl seals\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSea water pump impeller\u003c\/td\u003e\n        \u003ctd\u003e2–3 seasons or 200 hours\u003c\/td\u003e\n        \u003ctd\u003eShorten interval for high‑silt, sandy, or brackish use\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-impellers\"\u003eMerCruiser Impellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (engine\/drive)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 3 months; replace at ~50% loss\u003c\/td\u003e\n        \u003ctd\u003eMatch alloy (zinc\/aluminum\/magnesium) to your water type\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSerpentine\/accessory belt\u003c\/td\u003e\n        \u003ctd\u003eInspect each season; replace on wear\/noise\u003c\/td\u003e\n        \u003ctd\u003eVerify routing and tension after replacement\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelt\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase seals (pressure test)\u003c\/td\u003e\n        \u003ctd\u003eTest if water or excessive metal is found\u003c\/td\u003e\n        \u003ctd\u003eCheck prop shaft for fishing line; renew seals and O‑rings as needed\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\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:980px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-service-maintenance-kits\"\u003eMerCruiser Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-impellers\"\u003eMerCruiser Impellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – Filters: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – Pumps: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-pumps\"\u003eMerCruiser Fuel Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-alternators\"\u003eMerCruiser Alternators\u003c\/a\u003e \u0026amp; \u003ca href=\"https:\/\/seasierra.com\/collections\/starters\"\u003eStarters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion \/ Propellers: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-propellers\"\u003eMerCruiser Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGaskets \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-gaskets\"\u003eMerCruiser Gaskets\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:980px;\"\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; border-bottom:1px solid #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; 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\u003eOverheat alarm \/ high temperature\u003c\/td\u003e\n        \u003ctd\u003eInspect sea strainer and drive water inlets for blockage; verify impeller condition; test thermostat\u003c\/td\u003e\n        \u003ctd\u003eWater pump impeller kit, thermostat, intake screens, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd\u003eCheck fuel quality and filter restriction; inspect prop for damage\/ventilation; verify throttle linkage\u003c\/td\u003e\n        \u003ctd\u003eFuel filter\/water separator, fuel pump, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eConfirm battery voltage and connections; inspect spark plugs; look for vacuum leaks and fouled fuel\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, starter, fuel filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eCheck gear oil level\/condition; inspect for fishing line at prop shaft; pressure test drive\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, prop shaft seals, gear lube\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBattery not charging\u003c\/td\u003e\n        \u003ctd\u003eVerify belt condition\/tension; test alternator output and wiring; inspect grounds\u003c\/td\u003e\n        \u003ctd\u003eAlternator, serpentine belt, electrical connectors\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:980px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between 377 MAG MPI and 6.2L ECT platforms?\u003c\/summary\u003e\n    \u003cp\u003eMany routine service parts are similar, but emissions, cooling, and some sensors\/hoses differ. Always confirm by engine serial number and drive model to ensure proper fit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the raw‑water impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace every 2–3 seasons (or ~200 hours), sooner for sandy\/silty or high‑temperature operation. Any overheating event warrants immediate inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the drive gear oil?\u003c\/summary\u003e\n    \u003cp\u003eFor most recreational use, change every 100 hours or annually. If you find water or metal debris, pressure test and service seals before returning to service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eEngine serial number, model designation (e.g., 377 MAG MPI or 6.2L ECT), drive type (Bravo 1\/2\/3), cooling type (raw vs. closed), and any emissions labels. Photos of the serial tag 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 #e5e7eb; border-radius:8px; max-width:980px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse our main MerCruiser collection and use the Filter \u0026amp; Sort controls to refine your results.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; margin:8px 0; padding:10px 14px; background:#0d6efd; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop MerCruiser Parts\u003c\/a\u003e\n  \u003cp style=\"font-size:0.95em; color:#374151;\"\u003eIf you’re unsure about your model, send us a clear photo of the serial\/nameplate and the part you need—we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"90-amp-fuse-assembly-fits-mercruiser-3-0l-8-2l-replaces-79023a91-88-79023a91-8m0207795","title":"90 Amp Fuse Assembly for MerCruiser 3.0L–8.2L Stern Drive Engines – Replaces 79023A91 and 88-79023A91","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e90 Amp Fuse Assembly\u003c\/strong\u003e is a replacement circuit-protection component for applicable Mercury MerCruiser stern drive engines in the 3.0L–8.2L range. It is intended to replace the original fuse assembly when the existing component is damaged, blown, or otherwise requires replacement.\u003c\/p\u003e\n\u003cp\u003eUse the part number and the physical configuration of your original component to confirm compatibility before ordering. Application details can vary by engine model, year, and serial number.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90-amp fuse assembly for applicable MerCruiser stern drive applications.\u003c\/li\u003e\n\u003cli\u003eDesigned as a replacement for the listed Mercury\/MerCruiser reference numbers.\u003c\/li\u003e\n\u003cli\u003eSingle replacement fuse assembly; mounting hardware and additional fuses are not included unless specifically shown in the product photos or order details.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThese are the reference numbers associated with this replacement assembly.\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\u003eReference Part Number\u003c\/th\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e79023A91\u003c\/td\u003e\n        \u003ctd\u003eReference number for comparison\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury \/ MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e88-79023A91\u003c\/td\u003e\n        \u003ctd\u003eReference number for comparison\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eReference numbers are provided for identification and comparison. Confirm the exact engine model, year, serial number, and original fuse configuration before installation.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThis replacement is listed for applicable \u003cstrong\u003eMercury MerCruiser 3.0L–8.2L stern drive engines\u003c\/strong\u003e. The displacement range alone does not confirm fitment for every engine configuration.\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\u003eEngine Application\u003c\/th\u003e\n        \u003cth\u003eEngine Type\u003c\/th\u003e\n        \u003cth\u003eDisplacement Range\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\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003eApplicable stern drive engines\u003c\/td\u003e\n        \u003ctd\u003eInboard marine gasoline engine used with a stern drive\u003c\/td\u003e\n        \u003ctd\u003e3.0L–8.2L\u003c\/td\u003e\n        \u003ctd\u003e79023A91; 88-79023A91\u003c\/td\u003e\n        \u003ctd\u003eVerify model, year, serial number, and the original fuse assembly before purchase.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eThis listing should not be used as confirmation for Mercury outboard, Verado, or unrelated inboard applications unless the original part number and application documentation match.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003e90 Amp fuse assembly\u003c\/dd\u003e\n  \u003cdt\u003eRated Capacity\u003c\/dt\u003e\n  \u003cdd\u003e90 amp\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eApplicable Mercury MerCruiser stern drive engines\u003c\/dd\u003e\n  \u003cdt\u003eDisplacement Coverage\u003c\/dt\u003e\n  \u003cdd\u003e3.0L–8.2L, subject to exact model and serial-number verification\u003c\/dd\u003e\n  \u003cdt\u003eReplacement References\u003c\/dt\u003e\n  \u003cdd\u003e79023A91 and 88-79023A91\u003c\/dd\u003e\n  \u003cdt\u003eProduct Format\u003c\/dt\u003e\n  \u003cdd\u003eSingle replacement assembly\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 90 Amp fuse assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAdditional fuses, mounting hardware, cables, and installation tools are not included unless specifically stated in the order details.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTurn off all electrical power and disconnect the battery before beginning work. Follow the engine manufacturer's electrical-service procedures.\u003c\/li\u003e\n\u003cli\u003eLocate the existing fuse assembly and compare its part-number markings, terminal arrangement, and physical mounting configuration with the replacement.\u003c\/li\u003e\n\u003cli\u003eRemove the cable connections only after the battery has been disconnected. Label the cables if necessary so they can be returned to their original positions.\u003c\/li\u003e\n\u003cli\u003eRemove the existing fuse assembly from its mounting location.\u003c\/li\u003e\n\u003cli\u003eInstall the replacement assembly securely in the original position without forcing or stressing the cables.\u003c\/li\u003e\n\u003cli\u003eClean and inspect the cable terminals. Reconnect them to the correct terminals and tighten the connections securely.\u003c\/li\u003e\n\u003cli\u003eReconnect the battery and test the electrical system. If the replacement fuse opens again, locate and repair the underlying short circuit or electrical fault before installing another fuse.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eMarine electrical repairs should be performed by a qualified technician when the correct circuit, fuse rating, or wiring configuration is uncertain.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know whether the fuse assembly needs replacement?\u003c\/summary\u003e\n\u003cp\u003eA failed fuse may interrupt power to the protected circuit and can prevent the engine from cranking or operating normally. Inspect the fuse and test it with suitable electrical equipment. Always identify the cause of a blown fuse before replacing it.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich engines does this replacement fit?\u003c\/summary\u003e\n\u003cp\u003eThe recorded application is for applicable Mercury MerCruiser stern drive engines from 3.0L through 8.2L. Engine displacement alone is not sufficient to confirm fitment, so compare the original part number and verify the exact model, year, and serial number.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this replacement for a Mercury outboard or Verado power-steering circuit?\u003c\/summary\u003e\n\u003cp\u003eThat application is not confirmed by the available product record. Do not use this listing for an outboard or Verado application unless the original part number and manufacturer application information match exactly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I install a fuse with a different amperage rating?\u003c\/summary\u003e\n\u003cp\u003eNo. Use the specified 90-amp rating only when it matches the manufacturer's required circuit protection. A higher-rated fuse can allow excessive current and wiring damage, while a lower-rated fuse may open unnecessarily.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM Mercury\/MerCruiser component?\u003c\/summary\u003e\n\u003cp\u003eThis listing is for a replacement fuse assembly. It is not presented as a genuine Mercury\/MerCruiser-branded component. Confirm the replacement's part-number and physical compatibility before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat if the replacement fuse fails immediately?\u003c\/summary\u003e\n\u003cp\u003eDo not continue replacing fuses without diagnosing the circuit. An immediate failure can indicate a short, damaged cable, faulty starter or alternator circuit, incorrect wiring, or another electrical problem. Have the system tested by a qualified marine technician.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the shipping and return options?\u003c\/summary\u003e\n\u003cp\u003eAvailable shipping methods, delivery estimates, and return conditions are shown at checkout and are governed by the store's current policies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify the original part number, terminal layout, physical configuration, engine model, year, and serial number before ordering.\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery before removing or installing any high-current fuse assembly.\u003c\/li\u003e\n\u003cli\u003eNever substitute a different fuse rating or bypass the fuse with wire or another conductive material.\u003c\/li\u003e\n\u003cli\u003eThis is a replacement component and is not represented as a genuine OEM-branded part.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when the electrical fault or correct application is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We provide replacement components for common marine-service applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-Focused Support\u003c\/strong\u003e — Compare the original part number and engine details before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService-Friendly Ordering\u003c\/strong\u003e — Review the product information and current store policies at checkout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718268129595,"sku":"C35JuW4T420","price":19.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/C35JuW4T420.png?v=1762958620"},{"product_id":"water-pump-impeller-kit-fits-mercruiser-bravo-1-2-3-4-3l-7-4l-v8-engines-replaces-47-59362t6-47-59362t1","title":"Water Pump Impeller Kit for MerCruiser One-Piece Sea Water Pumps – Replaces 47-59362T6","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis Sea Sierra \u003cstrong\u003eWater Pump Impeller Kit\u003c\/strong\u003e is an aftermarket replacement service kit for selected MerCruiser drive-mounted sea water pumps with a one-piece pump body. Catalog references identify this configuration as an upper sea water pump housing impeller kit for a MerCruiser one-piece pump. Confirm the pump-body design and the part number on your original component before ordering.\u003c\/p\u003e\n  \u003cp\u003eThis kit replaces the MerCruiser reference \u003cstrong\u003e47-59362T6\u003c\/strong\u003e. The reference is used to identify the application and is not a statement that this aftermarket product is manufactured by Mercury Marine.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eDesigned for service of compatible one-piece MerCruiser sea water pump assemblies.\u003c\/li\u003e\n    \u003cli\u003eSuitable for replacing a worn or damaged raw-water-pump impeller when the pump housing and drive configuration match.\u003c\/li\u003e\n    \u003cli\u003eApplication depends on the complete pump assembly, drive, and serial-number range; engine displacement alone is not sufficient for fitment.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Reference\u003c\/h2\u003e\n  \u003cp\u003eUse the following manufacturer reference to compare against the part removed from your pump.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Reference\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMerCruiser\u003c\/td\u003e\n          \u003ctd\u003e47-59362T6\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Pump Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThis product should be selected by pump configuration and verified reference number rather than by a broad engine-size range. Catalog information associates the reference with a drive-mounted impeller kit for a MerCruiser one-piece sea water pump. Other MerCruiser pump designs, including two-piece housings and different drive-mounted service kits, use different impeller references.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Compatible Pump Configuration\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eApplication\u003c\/th\u003e\n          \u003cth\u003eConfiguration\u003c\/th\u003e\n          \u003cth\u003eReference\u003c\/th\u003e\n          \u003cth\u003eFitment Requirement\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMerCruiser drive-mounted sea water pump\u003c\/td\u003e\n          \u003ctd\u003eOne-piece pump body\u003c\/td\u003e\n          \u003ctd\u003e47-59362T6\u003c\/td\u003e\n          \u003ctd\u003eVerify the original pump and impeller reference before installation\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMerCruiser Alpha or Bravo-related applications\u003c\/td\u003e\n          \u003ctd\u003eVaries by pump design, drive, and serial number\u003c\/td\u003e\n          \u003ctd\u003eNot confirmed solely by engine model\u003c\/td\u003e\n          \u003ctd\u003eDo not order without matching the complete pump configuration\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\u003eSea water pump impeller service kit\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eSelected MerCruiser drive-mounted one-piece sea water pump assemblies\u003c\/dd\u003e\n    \u003cdt\u003eReplacement Reference\u003c\/dt\u003e\n    \u003cdd\u003eMerCruiser 47-59362T6\u003c\/dd\u003e\n    \u003cdt\u003ePump Configuration\u003c\/dt\u003e\n    \u003cdd\u003eOne-piece pump body\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eReplacement service part for a compatible raw-water pump\u003c\/dd\u003e\n    \u003cdt\u003eBrand Status\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement; not an OEM Mercury Marine component\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 Water pump impeller service kit\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eConfirm the supplied seals, gaskets, wear plate, or cover components against the contents shown for your specific order before disassembly. Do not reuse damaged sealing parts.\u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and close the seacock or sea strainer valve before beginning service.\u003c\/li\u003e\n    \u003cli\u003eVerify that the pump body is the one-piece configuration and compare the existing impeller with the replacement.\u003c\/li\u003e\n    \u003cli\u003eLocate the sea water pump and note the hose routing and connection locations before removal.\u003c\/li\u003e\n    \u003cli\u003eRemove the necessary hoses, fasteners, cover, or pump components according to the engine and pump manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller with a suitable impeller puller or removal tool. Avoid damaging the pump housing, shaft, and sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eClean the housing and inspect it for scoring, cracks, distortion, or debris. Replace damaged pump components before installing the new impeller.\u003c\/li\u003e\n    \u003cli\u003eLubricate the impeller and sealing surfaces with a suitable marine lubricant compatible with the pump manufacturer's instructions. Do not run the pump dry.\u003c\/li\u003e\n    \u003cli\u003eInstall the impeller in the correct rotational direction and reinstall the cover and any supplied sealing components.\u003c\/li\u003e\n    \u003cli\u003eReinstall the pump, reconnect the hoses, open the seacock, and restore the cooling-water supply.\u003c\/li\u003e\n    \u003cli\u003eStart the engine only with adequate water supply. Check immediately for water flow, leaks, abnormal noise, and proper operating temperature.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if this impeller kit fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eConfirm that your engine uses a MerCruiser drive-mounted sea water pump with a one-piece pump body and that the existing impeller or pump reference is 47-59362T6. Engine displacement, model family, or drive name by itself does not confirm fitment.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a failing water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include higher-than-normal engine temperature, reduced cooling-water flow, overheating at idle or low speed, and cracked, torn, stiff, or permanently deformed impeller blades when inspected.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the impeller according to the engine manufacturer's maintenance schedule and replace it when the blades show wear, cracking, hardening, deformation, or damage. Frequent use in saltwater, sandy water, or other contaminated conditions may require more frequent inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat can cause premature impeller failure?\u003c\/summary\u003e\n    \u003cp\u003eCommon causes include operating the pump without an adequate water supply, abrasive sand or debris, extended storage, corrosion, incorrect installation direction, and a worn or damaged pump housing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement service kit referenced to MerCruiser 47-59362T6. It is not manufactured or branded by Mercury Marine.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat should I verify before ordering?\u003c\/summary\u003e\n    \u003cp\u003eMatch the pump-body design, drive-mounted configuration, original reference number, and available serial-number information. If the pump is a two-piece design or the reference does not match, select the service kit specified for that assembly instead.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNever operate a raw-water pump without an adequate water supply.\u003c\/li\u003e\n    \u003cli\u003eVerify the complete pump configuration and original reference before purchase and installation.\u003c\/li\u003e\n    \u003cli\u003eInspect the pump housing, cover, shaft, wear surfaces, and sealing surfaces during service.\u003c\/li\u003e\n    \u003cli\u003eFollow the engine and pump manufacturer's service instructions and torque specifications.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the pump assembly or engine service procedure is unfamiliar.\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 aftermarket components for routine marine maintenance and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Service\u003c\/strong\u003e — Match the pump configuration and manufacturer reference before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePractical Maintenance Support\u003c\/strong\u003e — Replace wear items promptly to help maintain reliable raw-water cooling performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723789766971,"sku":"QM-59362T6","price":31.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/QM-59362T6.png?v=1763031831"},{"product_id":"serpentine-belt-idler-pulley-fits-mercruiser-4-3-5-0-5-7-6-2l-v6-v8-engines-replaces-864625t-807757t","title":"Serpentine Belt Idler Pulley – Fits MerCruiser 4.3, 5.0, 5.7, 6.2L V6\/V8 Engines (Replaces 864625T)","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 aftermarket \u003cstrong\u003eserpentine belt idler pulley\u003c\/strong\u003e is designed as a replacement for selected Mercury MerCruiser engines, including 4.3L V6, 5.0L V8, 5.7L V8, and 6.2L V8 models. The pulley guides the serpentine belt and supports smooth, properly aligned accessory-belt operation.\u003c\/p\u003e\n\u003cp\u003eThis replacement pulley corresponds to Mercury\/MerCruiser part number \u003cstrong\u003e864625T\u003c\/strong\u003e. Always compare the original pulley, mounting arrangement, and engine-specific parts information before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement idler pulley for compatible MerCruiser serpentine-belt systems.\u003c\/li\u003e\n  \u003cli\u003eHelps guide the belt and maintain proper belt tracking.\u003c\/li\u003e\n  \u003cli\u003eSupplied as one idler pulley; mounting hardware is not included unless specifically stated.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Reference\u003c\/h2\u003e\n\u003cp\u003eUse the reference below to compare the replacement with the original application.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\/MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e864625T\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 product record identifies this pulley for the following MerCruiser engine displacements and configurations. Exact fitment can vary by model year, accessory arrangement, and serial-number range, so confirm the original part number and belt layout before ordering.\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\u003eEngine\u003c\/th\u003e\n        \u003cth\u003eConfiguration\u003c\/th\u003e\n        \u003cth\u003eReference Part No.\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\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L\u003c\/td\u003e\n        \u003ctd\u003eV6, 4-stroke\u003c\/td\u003e\n        \u003ctd\u003e864625T\u003c\/td\u003e\n        \u003ctd\u003eConfirm model year, belt routing, and serial range.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L\u003c\/td\u003e\n        \u003ctd\u003eV8, 4-stroke\u003c\/td\u003e\n        \u003ctd\u003e864625T\u003c\/td\u003e\n        \u003ctd\u003eConfirm model year, belt routing, and serial range.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L\u003c\/td\u003e\n        \u003ctd\u003eV8, 4-stroke\u003c\/td\u003e\n        \u003ctd\u003e864625T\u003c\/td\u003e\n        \u003ctd\u003eConfirm model year, belt routing, and serial range.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e6.2L\u003c\/td\u003e\n        \u003ctd\u003eV8, 4-stroke\u003c\/td\u003e\n        \u003ctd\u003e864625T\u003c\/td\u003e\n        \u003ctd\u003eConfirm model year, belt routing, and serial range.\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\u003eSerpentine belt idler pulley\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Mercury MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement when the original part and mounting arrangement match\u003c\/dd\u003e\n  \u003cdt\u003eReference Part Number\u003c\/dt\u003e\n  \u003cdd\u003e864625T\u003c\/dd\u003e\n  \u003cdt\u003ePackage Type\u003c\/dt\u003e\n  \u003cdd\u003eSingle component\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 Serpentine belt idler pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMounting bolts, belt tensioners, and other installation hardware are not included unless specifically stated.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the boat's battery and allow the engine to cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eReview the belt-routing diagram and identify the idler pulley mounting point.\u003c\/li\u003e\n  \u003cli\u003eUse the appropriate tool to release tension from the serpentine belt.\u003c\/li\u003e\n  \u003cli\u003eRemove the belt from the original idler pulley and inspect the belt for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eRemove the original pulley and retain the factory mounting hardware if it is serviceable.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement pulley in the original position and verify that it is seated correctly.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting fastener to the engine manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eRoute the serpentine belt according to the correct engine diagram.\u003c\/li\u003e\n  \u003cli\u003eRelease the tensioner gradually and confirm that the belt is fully seated in every pulley groove.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and run the engine briefly to verify smooth operation and proper belt tracking.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if my idler pulley is failing?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include squealing, chirping, or grinding from the belt area; visible wobble or excessive play; rough rotation; or physical damage to the pulley. Inspect the belt and neighboring pulleys at the same time.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the function of the idler pulley?\u003c\/summary\u003e\n  \u003cp\u003eAn idler pulley guides the serpentine belt and helps maintain correct belt alignment as the belt drives the engine accessories. It does not replace the belt tensioner.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs a special tool required for installation?\u003c\/summary\u003e\n  \u003cp\u003eA socket or wrench set is normally required for the pulley fastener. A belt-tensioner tool or suitable long-handled wrench may be needed to release belt tension, depending on the engine's design.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this pulley come with a new bolt?\u003c\/summary\u003e\n  \u003cp\u003eNo. The package contains the idler pulley only. The original mounting hardware is typically reused when it is undamaged and suitable for the application. Inspect all hardware before reinstallation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM pulley?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement pulley, not a Mercury\/MerCruiser-branded OEM component. Confirm the original part number and physical configuration before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I verify before ordering?\u003c\/summary\u003e\n  \u003cp\u003eCompare the original pulley, mounting point, belt path, and reference part number. Model year, engine configuration, and serial-number conditions may affect compatibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed and cost\u003c\/summary\u003e\n  \u003cp\u003eShipping methods, delivery estimates, and applicable costs are shown at checkout based on the destination and service selected.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty and returns\u003c\/summary\u003e\n  \u003cp\u003eReturns and warranty coverage are subject to the seller's current policies. Contact support with your order details if the product arrives damaged or a confirmed manufacturing issue occurs.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the original part number, pulley appearance, mounting arrangement, belt routing, and engine serial-number requirements before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the engine with a damaged, misaligned, or improperly tensioned serpentine belt.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and keep hands, tools, and clothing clear of moving components during inspection and testing.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct fitment or belt-routing procedure is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine replacement parts selected for practical service and repair applications.\u003c\/li\u003e\n  \u003cli\u003eClear product information to help customers compare part references and applications.\u003c\/li\u003e\n  \u003cli\u003eSupport for fitment questions and order-related assistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723789898043,"sku":"23TP206OC","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23TP206OC.png?v=1763031836"}],"url":"https:\/\/seasierra.com\/collections\/mercury-mercruiser-4-stroke-320hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}