{"title":"Volvo Penta 4-Stroke 145-480HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003e\n    This page is for Volvo Penta 4‑Stroke 145–480 HP marine diesel engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Volvo Penta collection. Scroll to the bottom 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  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a5;border-radius:6px;text-decoration:none;\"\u003eBrowse All Volvo Penta Parts\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 145–480HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the engine identification plate: commonly on the top of the rocker\/valve cover or on the starboard side of the cylinder block; the sterndrive or inboard gear also has a separate serial plate.\u003c\/li\u003e\n    \u003cli\u003eModel code format typically appears as D4-xxx or D6-xxx (e.g., D4-260, D6-370); suffix letters indicate generation and equipment updates.\u003c\/li\u003e\n    \u003cli\u003eD4 vs D6 distinction: D4 is an inline‑4; D6 is an inline‑6. Cylinder count and overall engine length are quick visual cues.\u003c\/li\u003e\n    \u003cli\u003eNote your EVC\/drive configuration (e.g., DPS\/DPH sterndrive or inboard) as some cooling and anode parts vary by installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eVolvo Penta D4 Platform (Inline‑4 Common‑Rail Diesel)\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 #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\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\u003eInline‑4, common‑rail injected, turbocharged aftercooled 4‑stroke diesel\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eD4‑145 to D4‑320 across multiple generations (approx. 2003–present)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong mid‑range torque, efficient fuel consumption, compact footprint for twin installations\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eBelts, filters, and impellers are platform‑specific by model year\/serial; confirm with your engine data plate.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eVolvo Penta D6 Platform (Inline‑6 Common‑Rail Diesel)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\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\u003eInline‑6, common‑rail injected, turbocharged aftercooled 4‑stroke diesel\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eD6‑280 to D6‑480 across multiple generations (approx. 2003–present)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eVery high torque output, smooth running, robust for heavy hulls and commercial duty\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eCooling, anodes, and belt lengths differ from D4; verify serial range and installation (sterndrive vs inboard).\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; always follow your official Volvo Penta service manual and local operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\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\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eUse marine‑grade diesel oil meeting Volvo Penta specs; replace filter at each oil change\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-service-maintenance-kits\"\u003eVolvo Penta Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eDrive\/gear oil (sterndrive)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eChange and inspect for water contamination or metal debris\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-service-maintenance-kits\"\u003eVolvo Penta Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePrimary fuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd\u003eInspect 50 hours; replace 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eDrain water frequently; carry spares onboard\u003c\/td\u003e\n        \u003ctd\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\u003eSecondary (engine) fuel filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 200 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace more often with poor fuel quality\u003c\/td\u003e\n        \u003ctd\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\u003eAir filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 200 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eCheck for restriction; replace if soiled or wet\u003c\/td\u003e\n        \u003ctd\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\u003eRaw‑water pump impeller\u003c\/td\u003e\n        \u003ctd\u003eEvery 200 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace sooner if overheating, low flow, or vane set shows cracking\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-impellers\"\u003eVolvo Penta 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 monthly; replace as needed\u003c\/td\u003e\n        \u003ctd\u003eChange when 50% consumed; ensure the correct alloy for your water\u003c\/td\u003e\n        \u003ctd\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\u003eSerpentine\/drive belt\u003c\/td\u003e\n        \u003ctd\u003eInspect 100 hours; replace 2–3 years or 300–500 hours\u003c\/td\u003e\n        \u003ctd\u003eLook for glazing, cracks, fraying, or noise on startup\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\u003eThermostat and seals\u003c\/td\u003e\n        \u003ctd\u003eInspect annually; replace ~2 years\u003c\/td\u003e\n        \u003ctd\u003eReplace if overheating at cruise or temp swings\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-gaskets\"\u003eVolvo Penta Gaskets\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eClosed‑cooling coolant (if equipped)\u003c\/td\u003e\n        \u003ctd\u003ePer manual (often 2–5 years)\u003c\/td\u003e\n        \u003ctd\u003eUse approved coolant; do not mix types\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta\"\u003eVolvo Penta\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:12px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service Kits – \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 Filters – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-fuel-filters\"\u003eVolvo Penta Fuel filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition\/Charging \u0026amp; Starting – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-alternators\"\u003eVolvo Penta Alternators\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eAir Intake – \u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta-air-filters\"\u003eVolvo Penta Air Filters\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\u003eBelts \u0026amp; Tensioners – \u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelt\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:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOverheat alarm or rising temperature\u003c\/td\u003e\n        \u003ctd\u003eInspect seawater intake screens\/strainor, raw‑water pump impeller, and thermostat; verify belt is driving the pump\u003c\/td\u003e\n        \u003ctd\u003eWater pump impeller kit, thermostat, intake screen, belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or low top‑end power\u003c\/td\u003e\n        \u003ctd\u003eCheck for clogged fuel filters, boost\/charge‑air hose leaks, soiled air filter, fouled prop or heavy growth\u003c\/td\u003e\n        \u003ctd\u003eFuel filters, turbo hoses, turbocharger, air filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003eConfirm battery voltage and cranking speed, replace fuel filters, inspect for air in fuel, scan sensors\u003c\/td\u003e\n        \u003ctd\u003eFuel filters, starters, sensors, hoses\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNo charge or belt squeal\u003c\/td\u003e\n        \u003ctd\u003eCheck serpentine belt condition\/tension and tensioner; test alternator output\u003c\/td\u003e\n        \u003ctd\u003eBelt, tensioner pulley, alternator\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in oil (sterndrive)\u003c\/td\u003e\n        \u003ctd\u003eVerify oil level\/condition; inspect for water intrusion; check prop shaft seals\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, bearings, prop shaft seals, gear oil\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 between D4 and D6 engines or different years?\u003c\/summary\u003e\n    \u003cp\u003eSome service items look similar but many parts differ by platform and generation. Always confirm with the full model designation and serial number to ensure proper fit.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the raw‑water impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAt least annually or every 200 hours. Replace sooner if you see reduced flow, rising temperatures, or visible vane wear.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should sterndrive gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100 hours or annually, with inspection for water or metal debris at each service. Follow your manual if operating in severe conditions.\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 engine model (D4 or D6 and horsepower rating), full serial number, installation type (sterndrive\/inboard), and if possible the OEM part number from your existing component.\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 the right parts? Browse the main Volvo Penta collection by horsepower, year, and model.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/volvo-penta\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0a5;border-radius:6px;text-decoration:none;\"\u003eShop Volvo Penta Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"font-size:0.95em;color:#444;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"serpentine-drive-belt-fits-volvo-penta-d4-d6-series-engines-replaces-21405494-3583729-21405444","title":"Volvo Penta D4 \u0026 D6 Marine V-Belt – Replaces 21405494, 21405444 \u0026 3583729","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\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\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\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\n  \/* Small screen optimization *\/\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\u003emarine V-belt\u003c\/strong\u003e is designed for Volvo Penta D4 and D6 engine applications. It provides dependable belt drive performance for the engine's belt-driven components when the original belt is worn, cracked, glazed, or otherwise due for replacement.\u003c\/p\u003e\n\u003cp\u003eThe belt is listed as a replacement for Volvo Penta reference numbers \u003cstrong\u003e21405494\u003c\/strong\u003e, \u003cstrong\u003e21405444\u003c\/strong\u003e, and \u003cstrong\u003e3583729\u003c\/strong\u003e. Confirm the reference number and belt profile against the belt removed from your engine before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Marine V-belt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Volvo Penta D4 and D6 engines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement references:\u003c\/strong\u003e 21405494, 21405444, and 3583729\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Replacement belt for marine engine service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following manufacturer reference numbers when comparing the replacement belt with your existing part.\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\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e21405494\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e21405444\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3583729\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe company catalog identifies this belt for \u003cstrong\u003eVolvo Penta D4 and D6\u003c\/strong\u003e applications. The available company fitment does not specify individual model suffixes, horsepower ratings, production years, serial-number ranges, or stroke variations. Verify the engine identification and reference number before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine Family\u003c\/th\u003e\n        \u003cth\u003eApplication\u003c\/th\u003e\n        \u003cth\u003eReference Numbers\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eD4\u003c\/td\u003e\n        \u003ctd\u003eMarine engine application\u003c\/td\u003e\n        \u003ctd\u003e21405494, 21405444, 3583729\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003eD6\u003c\/td\u003e\n        \u003ctd\u003eMarine engine application\u003c\/td\u003e\n        \u003ctd\u003e21405494, 21405444, 3583729\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\u003eMarine V-belt\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eVolvo Penta D4 and D6 engine applications\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eEngine-mounted belt drive\u003c\/dd\u003e\n  \u003cdt\u003eReference Numbers\u003c\/dt\u003e\n  \u003cdd\u003e21405494, 21405444, and 3583729\u003c\/dd\u003e\n  \u003cdt\u003eProduct Status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Marine V-belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eSwitch off the engine and disconnect the vessel's battery to prevent accidental starting.\u003c\/li\u003e\n  \u003cli\u003eAllow the engine to cool, then locate the belt and its tensioning or adjustment components.\u003c\/li\u003e\n  \u003cli\u003eRelease belt tension according to the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the old belt and note its routing before installation.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement belt over the correct pulleys, ensuring that it is fully seated in the V-grooves.\u003c\/li\u003e\n  \u003cli\u003eRestore the specified belt tension using the engine manufacturer's procedure.\u003c\/li\u003e\n  \u003cli\u003eTurn the engine by hand where appropriate and recheck belt alignment before reconnecting the battery and starting the engine.\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 belt fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eThis belt is cataloged for Volvo Penta D4 and D6 applications and replaces reference numbers 21405494, 21405444, and 3583729. Because individual model suffixes, years, and serial-number ranges are not specified in the available fitment data, compare the reference number and belt profile with your existing belt before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a worn or failing belt?\u003c\/summary\u003e\n  \u003cp\u003eInspect the belt for cracks, fraying, glazing, hardening, visible damage, or abnormal wear. Squealing or chirping during operation can also indicate a belt, alignment, or tension problem. Investigate the cause before installing a replacement.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the belt be replaced?\u003c\/summary\u003e\n  \u003cp\u003eInspect the belt during routine engine service and replace it when it shows damage, deterioration, abnormal wear, or insufficient tension. Follow the maintenance guidance for your specific Volvo Penta engine.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDo I need a special tool to change this belt?\u003c\/summary\u003e\n  \u003cp\u003eThe required tools depend on the engine installation and belt-tensioning arrangement. Use the tools and procedure specified in the applicable Volvo Penta service documentation, and do not force the belt over a pulley.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM belt?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement belt. The listed Volvo Penta numbers are reference numbers used to help identify the intended replacement application; this product is not represented as a Volvo Penta original-equipment component.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow fast is shipping and what does it cost?\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide, and typical transit time is 5–15 days. Standard shipping is free for most orders. If available for your location, expedited shipping options and their costs will be displayed at checkout.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n  \u003cp\u003eReturns are accepted within our standard return window for unused items in their original condition. Please contact our support team with your order details if you have a product question or need return instructions. Warranty coverage, where applicable, follows the terms provided with the order.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the belt profile, reference number, pulley arrangement, and engine application against your original part before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not install a belt that is damaged, incorrectly sized, or not fully seated in the pulley grooves.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and follow the engine manufacturer's safety and service instructions before beginning work.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct belt routing or tension procedure 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\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine replacement parts selected for dependable service in real-world applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — We offer free standard delivery to most regions with a typical transit time of 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — By working directly with manufacturing partners, we provide practical replacement parts at competitive prices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718270128443,"sku":"23BL342","price":35.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL342_1.jpg?v=1762958695"},{"product_id":"power-steering-drive-belt-fits-volvo-penta-d4-d6-series-145-480hp-replaces-21407028-3582696","title":"Volvo Penta Stern \/ Out Drive Marine Rubber Belt – OEM Reference 21407028, 3582696","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 \u003cstrong\u003eVolvo Penta Stern \/ Out Drive Marine Rubber Belt\u003c\/strong\u003e is a single replacement belt listed for marine belt applications. The supplied product information identifies it with Volvo Penta OEM reference numbers \u003cstrong\u003e21407028\u003c\/strong\u003e and \u003cstrong\u003e3582696\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eConfirm the reference number, belt dimensions, routing, and the specific stern-drive or out-drive application before ordering. The available product record does not specify an engine model, horsepower, year range, belt dimensions, or individual drive system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine rubber belt for Volvo Penta stern \/ out-drive applications.\u003c\/li\u003e\n  \u003cli\u003eSold as one individual belt.\u003c\/li\u003e\n  \u003cli\u003eUse the OEM reference numbers for application cross-checking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Information\u003c\/h2\u003e\n\u003cp\u003eThe following numbers are listed in the product record as OEM references for this belt.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Information\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n        \u003cth\u003eApplication Note\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e21407028\u003c\/td\u003e\n        \u003ctd\u003eReference number listed for this marine belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3582696\u003c\/td\u003e\n        \u003ctd\u003eReference number listed for this marine belt\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eApplication Information\u003c\/h2\u003e\n\u003cp\u003eThis belt is categorized for \u003cstrong\u003eVolvo Penta stern \/ out-drive\u003c\/strong\u003e marine applications. No verified engine model, serial-number range, horsepower range, year range, stroke specification, shaft specification, or belt size was provided in the available product record.\u003c\/p\u003e\n\u003cp\u003eBefore installation, compare the old belt with the replacement and confirm both OEM reference numbers with the engine or drive manufacturer's parts information. Do not rely on a broad engine-family match alone.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eMarine rubber belt\u003c\/dd\u003e\n  \u003cdt\u003eApplication Category\u003c\/dt\u003e\n  \u003cdd\u003eVolvo Penta stern \/ out drive\u003c\/dd\u003e\n  \u003cdt\u003eOEM References\u003c\/dt\u003e\n  \u003cdd\u003e21407028; 3582696\u003c\/dd\u003e\n  \u003cdt\u003ePackage Type\u003c\/dt\u003e\n  \u003cdd\u003eSingle belt, not a kit\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n  \u003cdd\u003eRubber\u003c\/dd\u003e\n  \u003cdt\u003eBelt Dimensions\u003c\/dt\u003e\n  \u003cdd\u003eNot specified; compare with the original belt before ordering\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 Marine rubber belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo additional hardware, pulleys, tensioners, seals, or other components are included unless separately stated in the order.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the engine, allow all components to cool, and follow the manufacturer's safety procedures.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery when required by the vessel or engine service instructions.\u003c\/li\u003e\n  \u003cli\u003eRecord the original belt routing before removal.\u003c\/li\u003e\n  \u003cli\u003eRemove the old belt using the correct service procedure for the specific stern-drive or out-drive assembly.\u003c\/li\u003e\n  \u003cli\u003eInspect the pulleys, belt guides, tensioning components, and surrounding parts for wear, misalignment, contamination, or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement belt in the original routing and ensure it is fully seated in every groove or contact surface.\u003c\/li\u003e\n  \u003cli\u003eSet belt tension only according to the manufacturer's service specification; do not estimate tension unless the service procedure permits it.\u003c\/li\u003e\n  \u003cli\u003eAfter installation, rotate or inspect the assembly as directed by the service manual, then check belt tracking during the initial run.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eInspection \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInspect the belt during scheduled maintenance and before extended operation.\u003c\/li\u003e\n  \u003cli\u003eReplace the belt if it shows cracking, fraying, glazing, contamination, missing material, abnormal stretching, or other damage.\u003c\/li\u003e\n  \u003cli\u003eInvestigate unusual noise, vibration, belt dust, or tracking problems before continued use.\u003c\/li\u003e\n  \u003cli\u003eCorrect pulley, alignment, or tensioning problems rather than installing a new belt over a damaged component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this belt fits?\u003c\/summary\u003e\n  \u003cp\u003eVerify that your original belt or parts documentation lists Volvo Penta OEM reference 21407028 or 3582696. Also compare the belt's dimensions, routing, and contact profile. The available product information does not confirm a specific engine model, year, horsepower, or serial-number range.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete belt kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for one individual marine rubber belt. Pulleys, tensioners, hardware, and other service components are not included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I check before installation?\u003c\/summary\u003e\n  \u003cp\u003eCheck the original belt reference, dimensions, routing, pulley condition, alignment, and tension requirements for your specific Volvo Penta stern-drive or out-drive assembly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I use the engine model or horsepower alone to select this belt?\u003c\/summary\u003e\n  \u003cp\u003eNo. The available record does not establish a model or horsepower fitment range. Confirm the OEM reference and the complete application details before purchase.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the belt be replaced?\u003c\/summary\u003e\n  \u003cp\u003eFollow the manufacturer's maintenance schedule and replace the belt sooner if inspection reveals wear, damage, contamination, abnormal noise, or tracking problems.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the OEM reference, dimensions, routing, and application before ordering.\u003c\/li\u003e\n  \u003cli\u003eDo not install a belt on worn, damaged, contaminated, or misaligned components.\u003c\/li\u003e\n  \u003cli\u003eUse the manufacturer's service instructions for belt tension and installation procedure.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct service procedure is not known.\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 Parts Support\u003c\/strong\u003e — We provide replacement components for marine service and maintenance applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Verification\u003c\/strong\u003e — Compare OEM references and the original component before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePractical Maintenance Guidance\u003c\/strong\u003e — Follow the manufacturer's service information for installation and inspection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718270161211,"sku":"23BL351","price":53.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL351_1.jpg?v=1762958696"}],"url":"https:\/\/seasierra.com\/collections\/volvo-penta-4-stroke-145-480hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}