{"title":"Indmar 4-Stroke 420HP Inboard Marine Engine","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eFor Indmar 4‑Stroke ~420 HP inboard engines, this page helps you zero in on compatible replacement parts and key service information. Below you’ll find maintenance schedules, commonly used parts, and troubleshooting guidance. You can also browse our main parts collections by category, and at the bottom of this page start browsing parts for this engine. On collection pages, use the Filter \u0026amp; Sort controls to narrow results by part category and other attributes.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0b5; border-radius:6px; text-decoration:none;\"\u003eBrowse Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n  \u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your ~420 HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the engine serial\/nameplate: commonly on the intake manifold or near the bellhousing; some Indmar V8s also have a label on the starboard valve cover or ECM bracket.\u003c\/li\u003e\n    \u003cli\u003eRead the model designation and suffix: series (e.g., Raptor 400\/440\/460), calibration, emissions package (CAT), and cooling type (raw water vs. closed) can be indicated by suffix codes.\u003c\/li\u003e\n    \u003cli\u003eConfirm platform details: most ~420 HP Indmar units are 6.2L V8 EFI 4‑Stroke. Supercharged “ROUSHcharged” variants will note the supercharger in the model name; naturally aspirated versions will not.\u003c\/li\u003e\n    \u003cli\u003eRecord serial number and model year to verify parts compatibility; small changes in pumps, sensors, and belt routing can vary by year\/configuration.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eIndmar V8 EFI (Approx. 6.2L) Inboard\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eV8, 4‑Stroke, closed- or raw‑water cooled, multi‑port EFI; typically naturally aspirated around 400–460 HP in tow‑sport applications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaptor Series examples such as 400, 440, and 460. Verify exact model\/serial for belt, pump, and sensor variations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eStrong low‑to‑midrange torque for towing, reliable EFI hot starts, robust cooling components for long idle times.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaw‑water pump impellers, belts, anodes, and filters are routine service items. Some parts interchange across Raptor variants, but always match by serial\/model year.\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:12px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑Stroke inboard tow‑sport use. Always follow the official service manual and your exact model’s maintenance schedule.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFirst 25 hrs, then every 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse marine‑approved oil; change filter each service.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel\/water separator \u0026amp; inline fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace elements to prevent lean conditions and surging.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 300 hrs or 3 years (inspect annually)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck gap and replace sooner if misfire or fouling occurs.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaw‑water pump impeller\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 200 hrs or annually (tow‑sport use)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace proactively; heat and idling shorten impeller life.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eAnodes (heat exchanger\/blocks)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 50 hrs; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEssential for corrosion protection in brackish\/salt water.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSerpentine\/alternator belt\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect every 100 hrs; replace 300–400 hrs or if cracked\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck tensioner and idlers for noise and alignment.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eTransmission\/V‑drive fluid\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eUse the specified fluid; inspect for water or debris.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance 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:#555;\"\u003e*Intervals are typical for recreational use; adjust for heavy towing, high heat, or extended idling.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eRaw‑Water Pump\/Impeller: \u003ca href=\"https:\/\/seasierra.com\/collections\/impellers\"\u003eImpellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition\/Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eBelts \u0026amp; Tensioners: \u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/tensioner-pulley\"\u003eTensioner Pulleys\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eOverheat alarm or weak transom stream\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect raw‑water strainer for debris; check impeller condition and hose clamps; confirm thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eRaw‑water pump impeller\/kit, intake screen\/strainer gasket, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eReplace fuel\/water separator; verify fuel pressure; inspect plugs and belt‑driven accessories for drag.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eFuel filter, spark plugs, belt\/tensioner\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eHard starting or rough idle (hot or cold)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eCheck battery condition and connections; inspect plugs; look for vacuum leaks; confirm clean fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSpark plugs, electrical connectors, fuel filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eBelt squeal or charging warning\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eInspect belt wear and tension; spin idlers\/tensioner by hand for noise; check alternator pulley alignment.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px 0;\"\u003eSerpentine belt, tensioner pulley, alternator\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:12px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across Raptor 400\/440\/460 engines?\u003c\/summary\u003e\n    \u003cp\u003eSome wear items (impellers, many filters, belts) may interchange, but calibrations, accessory brackets, and cooling layouts can differ. Always verify by serial number and model year.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace the raw‑water impeller?\u003c\/summary\u003e\n    \u003cp\u003eIn tow‑sport use with extended idling, replace annually or every ~200 hours—whichever comes first. Replace sooner if you see elevated temperature at idle or reduced flow.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should transmission\/V‑drive fluid be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypical guidance is every 100 hours or annually. Check the fluid for discoloration or water contamination and follow the specs in your exact transmission’s manual.\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 engine serial number, model designation (e.g., Raptor 440), year, cooling type (raw vs. closed), and any emission package notes (e.g., CAT). Photos of the nameplate and the part being replaced are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find what you need? Browse our main parts collections and filter by category to match your Indmar 4‑Stroke inboard.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0b5;border-radius:6px;text-decoration:none;\"\u003eShop Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n  \u003c\/p\u003e\n  \u003cp style=\"font-size:12px;color:#555;\"\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":"impeller-repair-kit-fits-volvo-penta-3-0-8-1l-gas-engines-replaces-21213664-3584350-3588914","title":"Aftermarket Impeller Repair Kit for Volvo Penta 3.0–8.1L Gas Engines — Replaces 21213664, 3584350 and 3588914","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 { 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\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eaftermarket impeller repair kit\u003c\/strong\u003e is intended for servicing the raw-water cooling pump on selected Volvo Penta V6 and V8 gasoline engines, including applications in the 3.0L, 4.3L, 5.0L, 5.7L and 8.1L displacement ranges. Replacing a worn or damaged impeller can help restore proper water circulation and cooling-system performance.\u003c\/p\u003e\n\u003cp\u003eThe impeller is listed as a replacement for Volvo Penta part numbers \u003cstrong\u003e21213664\u003c\/strong\u003e, \u003cstrong\u003e3584350\u003c\/strong\u003e and \u003cstrong\u003e3588914\u003c\/strong\u003e. Additional aftermarket and manufacturer references are provided below as cross-reference leads. Always compare the engine model, pump configuration, existing part number and impeller dimensions before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpline-drive installation for compatible raw-water pump applications.\u003c\/li\u003e\n  \u003cli\u003eNeoprene rubber impeller with a brass hub.\u003c\/li\u003e\n  \u003cli\u003eService kit includes the impeller, O-ring and gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following references to help identify a comparable replacement. A number match alone does not confirm fitment for every engine or pump configuration.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e21213664\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3584350\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3588914\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3841696\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3842786\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e21951354\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e09-812B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJohnson\u003c\/td\u003e\n\u003ctd\u003e09-812B-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJabsco\u003c\/td\u003e\n\u003ctd\u003e13554-0001\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6TA-12457-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3306\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndmar\u003c\/td\u003e\n\u003ctd\u003eS685007\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYanmar\u003c\/td\u003e\n\u003ctd\u003e119773-42600\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 applications below reflect the stated cross-reference range for compatible raw-water pump configurations. Model years, serial numbers, pump housings and shaft arrangements can vary, so confirm the complete application before installation.\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\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eReference Part No.\u003c\/th\u003e\n\u003cth\u003eApplication Notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e3.0GL, 3.0GS\u003c\/td\u003e\n\u003ctd\u003e130–140\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e21213664, 3584350\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e4.3GL, 4.3GS, 4.3GXi\u003c\/td\u003e\n\u003ctd\u003e180–225\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e21213664, 3588914\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e5.0GL, 5.0GXi\u003c\/td\u003e\n\u003ctd\u003e220–270\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e21213664, 3588914\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e5.7GL, 5.7GS, 5.7GXi\u003c\/td\u003e\n\u003ctd\u003e250–320\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e21213664, 3588914\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e8.1Gi, 8.1GXi\u003c\/td\u003e\n\u003ctd\u003e375–420\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e21213664, 3588914\u003c\/td\u003e\n\u003ctd\u003eRaw-water pump applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndmar\u003c\/td\u003e\n\u003ctd\u003eMonsoon\u003c\/td\u003e\n\u003ctd\u003e320–350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eS685007\u003c\/td\u003e\n\u003ctd\u003eListed for selected 320–350 HP configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eRaw-water pump impeller service kit\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eSpline drive\u003c\/dd\u003e\n  \u003cdt\u003eHub Material\u003c\/dt\u003e\n\u003cdd\u003eBrass\u003c\/dd\u003e\n  \u003cdt\u003eImpeller Material\u003c\/dt\u003e\n\u003cdd\u003eNeoprene rubber\u003c\/dd\u003e\n  \u003cdt\u003eOutside Diameter\u003c\/dt\u003e\n\u003cdd\u003e57 mm (2-1\/4 in)\u003c\/dd\u003e\n  \u003cdt\u003eWidth\u003c\/dt\u003e\n\u003cdd\u003e48.3 mm (1-15\/16 in)\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n\u003cdd\u003e12\u003c\/dd\u003e\n  \u003cdt\u003eCenter Bore\u003c\/dt\u003e\n\u003cdd\u003e14.5 mm\u003c\/dd\u003e\n  \u003cdt\u003eColor\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003ePackage Contents\u003c\/dt\u003e\n\u003cdd\u003e1 impeller, 1 O-ring and 1 gasket\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\u003cstrong\u003e1 × Impeller\u003c\/strong\u003e — neoprene rubber with brass hub; listed as a replacement for Volvo Penta 21213664\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × O-ring\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003e1 × Gasket\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eClose the seacock or water-intake valve and allow the engine to cool before servicing.\u003c\/li\u003e\n  \u003cli\u003eAccess the raw-water pump and remove the cover-plate screws.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller with suitable pliers or an impeller puller, taking note of the vane direction.\u003c\/li\u003e\n  \u003cli\u003eClean debris from the pump housing and inspect the housing, cover plate and key or drive interface for wear or damage.\u003c\/li\u003e\n  \u003cli\u003eLightly lubricate the replacement impeller and the inside of the pump housing with a suitable water-based marine lubricant.\u003c\/li\u003e\n  \u003cli\u003eInstall the impeller with the vanes oriented in the same direction as the original, unless the pump manufacturer specifies otherwise.\u003c\/li\u003e\n  \u003cli\u003eFit the new gasket and O-ring in their correct locations.\u003c\/li\u003e\n  \u003cli\u003eReinstall the cover plate and tighten the screws evenly in a crisscross pattern.\u003c\/li\u003e\n  \u003cli\u003eOpen the seacock, start the engine and check immediately for leaks, overheating and proper water discharge.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm that this impeller fits my engine?\u003c\/summary\u003e\u003cp\u003eCompare your engine brand, model, horsepower, stroke, pump configuration and existing part number with the information on this page. Also compare the impeller dimensions and drive interface with the removed part. If the model year or serial-number range is not shown, consult the engine or pump manufacturer before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs of a failing impeller?\u003c\/summary\u003e\u003cp\u003eSymptoms can include engine overheating at idle or low speed, reduced water discharge, damaged or missing vanes, cracking, hardening or visible wear. Inspect the pump and replace the impeller if it has run dry or shows damage.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should an impeller be inspected or replaced?\u003c\/summary\u003e\u003cp\u003eInspect the impeller at least annually and replace it according to the engine or pump manufacturer’s maintenance schedule. Frequent operation in sandy, silty or debris-laden water may require more frequent service.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat lubricant should be used during installation?\u003c\/summary\u003e\u003cp\u003eUse a water-based marine lubricant or a small amount of dish soap to help the impeller enter the housing. Avoid petroleum-based grease unless it is specifically approved for neoprene impellers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eAre there exceptions to the listed fitment?\u003c\/summary\u003e\u003cp\u003eYes. Similar engine models may use different pump housings, drive arrangements or impeller dimensions. The listed references and dimensions should be treated as application-identification information, not as a substitute for checking the complete engine and pump configuration.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement service kit. The manufacturer names and part numbers shown on this page are used only to identify intended applications and cross-reference references.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are the shipping and return terms?\u003c\/summary\u003e\u003cp\u003eShipping availability, delivery time, warranty coverage and returns are determined by the applicable store policies shown at checkout. Contact customer support before installation if the supplied parts do not match the ordered application.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model, model year or serial range where applicable, pump configuration, dimensions and reference number before purchase.\u003c\/li\u003e\n  \u003cli\u003eClose the water intake and allow the engine to cool before beginning service.\u003c\/li\u003e\n  \u003cli\u003eDo not operate the engine without an adequate water supply; a dry-running impeller can be damaged quickly.\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, cooling system or engine configuration is uncertain.\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 — Service components for selected recreational and marine engine applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Reference numbers, dimensions and installation information are provided to support part identification.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e — Contact support with your engine and pump details if you need help confirming an application before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718268227899,"sku":"XR17FI015","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/XR17FI015.png?v=1762958623"}],"url":"https:\/\/seasierra.com\/collections\/indmar-4-stroke-420hp-inboard-marine-engine.oembed","provider":"SeaSierra","version":"1.0","type":"link"}