{"title":"Volvo Penta D4 D6 Impeller Kit 3808857 (145-7533) - Fits Stern Drive Engines","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003e\n    This page is dedicated to Volvo Penta D4\/D6 diesel sterndrive engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse the main Volvo Penta 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.\n  \u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta\" style=\"display:inline-block; padding:10px 14px; background:#0a4; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Volvo Penta Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your Volvo Penta D4\/D6 Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the engine identification plate on the top\/front of the engine block and the transom shield or drive unit plate for Aquamatic sterndrives. Record the engine model (e.g., D4-300, D6-370) and serial number.\u003c\/li\u003e\n    \u003cli\u003eRead the full model code and suffix (e.g., D4-300A, D6-370D). Suffix letters often indicate revision level, emissions stage, or ancillary differences that affect parts selection.\u003c\/li\u003e\n    \u003cli\u003eDistinguish platforms: D4 is an inline-4 common-rail turbodiesel; D6 is an inline-6 common-rail turbodiesel. Many cooling and fuel components are platform-specific.\u003c\/li\u003e\n    \u003cli\u003eConfirm drive type (Aquamatic sterndrive vs inboard) because raw-water pumps, anodes, and gearcase components can differ by installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eD4 Platform (Inline-4 Diesel)\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 #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline-4, 4-stroke common-rail turbodiesel for Aquamatic sterndrive or inboard installations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eExamples include D4-225, D4-260, D4-300 (various revision letters A–G across years).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eStrong mid-range torque, efficient fuel burn, compact package for twin installations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eRaw-water pump and anodes are service-critical; some parts differ by revision letter and drive ratio—verify by serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"margin-top:20px;\"\u003eD6 Platform (Inline-6 Diesel)\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 #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline-6, 4-stroke common-rail turbodiesel, widely used on Aquamatic sterndrives and inboards.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eExamples include D6-280, D6-330, D6-370, D6-400, D6-435, D6-480 (various revision letters).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eHigh output with broad torque curve; robust cooling and charging systems for heavy-duty use.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eImpeller kits, anodes, and fuel filtration components are service items; some parts vary by model year and installation—check 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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for diesel sterndrives. Always follow the official Volvo Penta service manual for your exact model, hours, and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEngine oil \u0026amp; oil filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEvery 100–200 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eUse marine‑approved diesel engine oil; replace filter at each oil change.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\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:8px; border-bottom:1px solid #f0f0f0;\"\u003eDrive gear oil (Aquamatic)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect for water intrusion; replace sealing washers as needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-parts\"\u003eVolvo Penta Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003ePrimary\/secondary fuel filters\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEvery 200 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eReplace both filters; prime system and check for air leaks after service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-fuel-filters\"\u003eVolvo Penta Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eRaw water pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEvery 1–2 seasons (or 200–300 hours)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eReplace proactively; inspect pump cam\/wear plate and cover for scoring.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-water-pump-repair-kits\"\u003eVolvo Penta Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAnodes (engine \u0026amp; drive)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEvery 50–100 hours; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eMatch anode material (zinc\/aluminum\/magnesium) to your water type.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-anodes\"\u003eVolvo Penta Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAir filter \/ intake service\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect every 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eReplace if restricted; check for debris\/salt accumulation in intake path.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-air-filters\"\u003eVolvo Penta Air Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eSerpentine belt (drive belt)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect every 100 hours; replace 2–3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLook for cracks, glazing, or fraying; verify tensioner operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\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 vary by model year and duty cycle; consult your service manual.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-service-maintenance-kits\"\u003eVolvo Penta Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-water-pumps\"\u003eVolvo Penta Water Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-fuel-filters\"\u003eVolvo Penta Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eImpellers – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-impellers\"\u003eVolvo Penta Impellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-anodes\"\u003eVolvo Penta Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eElectrical \u0026amp; Sensors – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-sensors\"\u003eVolvo Penta Sensors\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion \u0026amp; Props – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-propellers\"\u003eVolvo Penta Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\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 #ddd; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eOverheat alarm \/ weak discharge\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect seawater intake screens, hoses, and raw-water pump impeller; verify heat exchanger cleanliness.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eWater pump repair kit, impeller, thermostat, intake screen, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCheck fuel filters for restriction, air leaks on suction side, and turbo\/charge-air hoses for leaks.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eFuel filters, sensors (MAP\/boost), turbo gasket set, hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eVerify fuel prime, water-in-fuel, and glow plug\/relay operation; confirm battery and starter performance.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eFuel filters, sensors, starter, glow plug relay\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metallic oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck drive oil level\/condition; inspect for water intrusion and sealing washer condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, gear lube, drain\/fill gaskets\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre D4 and D6 parts interchangeable across all years?\u003c\/summary\u003e\n    \u003cp\u003eMany items are platform-specific, and revisions (A, B, C, etc.) or installation type (sterndrive vs inboard) can change part selection. Always confirm by engine model and serial number before ordering.\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\u003eFor reliability, replace every 1–2 seasons or 200–300 hours, and sooner if you encounter overheating, low flow, or if the pump was run dry. Inspect the pump housing and wear components during each impeller service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change Aquamatic drive gear oil?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, service annually or every 100 hours. If the oil appears milky or metallic, service immediately and inspect seals and bearings.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full engine model (e.g., D4-300A), serial number, drive model, and a photo of the raw-water pump or the part you’re replacing. This ensures the correct kit or component is selected.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts? Browse the main Volvo Penta collection by model and category to locate components for your D4\/D6.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta\" style=\"display:inline-block; margin-top:6px; padding:10px 14px; background:#0a4; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Volvo Penta 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":[],"url":"https:\/\/seasierra.com\/collections\/volvo-penta-d4-d6-impeller-kit-3808857-145-7533-fits-stern-drive-engines.oembed","provider":"SeaSierra","version":"1.0","type":"link"}