{"title":"Crusader 4-Stroke 320HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eThis page is dedicated to Crusader 4‑Stroke 320HP marine engines. Use it to find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Crusader 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\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\" style=\"display:inline-block;padding:10px 14px;background:#0b6cff;color:#fff;text-decoration:none;border-radius:4px;\"\u003eBrowse All Crusader Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 320HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/nameplate: commonly on or near the flywheel\/bellhousing area, valve cover tag, or a decal on the ECM\/engine cover. Photograph the plate for accuracy.\u003c\/li\u003e\n    \u003cli\u003eModel codes and suffixes can indicate rotation (LH\/RH), cooling setup (fresh‑water heat exchanger vs. raw‑water), and accessory drive (V‑belt vs. serpentine). Note these details when ordering parts.\u003c\/li\u003e\n    \u003cli\u003eFuel system type matters: many 320HP Crusader V8s use multi‑port fuel injection (MPI) with a Fuel Control Cell (FCC). Early‑2000s engines may differ in hose routing and pump\/electrical connectors.\u003c\/li\u003e\n    \u003cli\u003eConfirm harness connector style (e.g., 10‑pin vs. 16‑pin ECM\/boat harness on certain years) before selecting electrical components.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eCrusader 5.7L V8 MPI (approx. 320 HP)\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;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 #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eGM‑based small‑block 5.7L V8, 4‑stroke, multi‑port fuel injection (ECM controlled), marine cooling with raw‑water pump and often a heat exchanger (fresh‑water cooling).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e5.7 MPI variants around 300–320 HP; model markings may appear as MP5.7 or 5.7 MPI with LH\/RH rotation notes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eStrong mid‑range torque, broad parts availability, straightforward seasonal service, robust cooling options for marine duty.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eMatch parts to rotation (LH\/RH), fuel system plumbing (FCC\/return styles), belt system (V‑belt vs. serpentine), and harness connectors. Always confirm by engine serial and configuration.\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 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical Crusader V8 marine use. Always follow your official service manual and local operating conditions.\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;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 #eee;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eUse marine‑rated oil and a quality filter; warm engine before drain for thorough service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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 #eee;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace FCC element and\/or primary water‑separating filter; purge air per manual.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eRaw‑water pump impeller\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace before storage if running in sandy\/silty water or after any overheat event.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eHeat‑exchanger zinc anodes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect monthly; replace when \u0026gt;50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eCritical for corrosion protection in brackish\/salt water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e300 hours or 3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eGap to spec; inspect plug wires\/boots for heat or moisture damage.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eSerpentine\/V‑belt\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect every 100 hours; replace 2–3 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eLook for glazing, cracks, frayed ribs; verify tensioner operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\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:8px;border-bottom:1px solid #eee;\"\u003eThermostat \u0026amp; gaskets\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e2–3 years or if temp is unstable\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace if running too cool\/hot or after overheat; use marine‑rated parts.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/gaskets\"\u003eGaskets\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eRaw‑water pump (housing\/cam)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e3–5 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFull pump refresh prevents repeat impeller failures and low flow at idle.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\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 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\/crusader-service-maintenance-kits\"\u003eCrusader Service \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, \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\/alternators-1\"\u003eAlternators\u003c\/a\u003e, \u003ca href=\"https:\/\/seasierra.com\/collections\/starters\"\u003eStarters\u003c\/a\u003e, \u003ca href=\"https:\/\/seasierra.com\/collections\/sensors\"\u003eSensors\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    \u003cli\u003eBelts \u0026amp; Pulleys – \u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eExhaust Components – \u003ca href=\"https:\/\/seasierra.com\/collections\/manifolds\"\u003eManifolds\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px 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;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 #eee;\"\u003eWeak water flow or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect raw‑water intake and strainer, impeller condition, belt tension, and thermostat operation. Check heat‑exchanger zincs for depletion.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eWater pump impeller kit, thermostat, anodes, belts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eReplace primary fuel\/water separator and FCC element; verify fuel pressure, inspect spark plugs and ignition leads.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eFuel filters, low‑pressure\/high‑pressure fuel pump, spark plugs, plug wires\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eClean throttle body, confirm IAC operation, check for vacuum leaks and stale fuel; ensure proper battery voltage during cranking.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eIAC valve, throttle body gasket\/cleaner, fuel filter, sensors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eLow charging voltage or belt squeal\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eInspect serpentine\/V‑belt condition and tensioner; test alternator output and cable connections.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eBelts, belt tensioner, alternator\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eTransmission temp alarm or hot oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eVerify raw‑water flow through the transmission oil cooler; check hoses for kinks and debris; confirm fluid level\/condition per the transmission manual.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #eee;\"\u003eRaw‑water hoses, transmission oil cooler, clamps\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 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome are, but many components vary by rotation (LH\/RH), fuel system configuration (FCC and plumbing changes), belt system (serpentine vs. V‑belt), and wiring connector type (e.g., boat harness\/ECM connectors). Always confirm by engine serial, model label, and configuration.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventative service, replace the raw‑water pump impeller every 100 hours or annually—sooner if you run in sandy\/silty water or experience an overheat. Inspect the pump housing and cam every service and refresh the full pump every few seasons.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should transmission fluid be changed?\u003c\/summary\u003e\n    \u003cp\u003eFollow the transmission manufacturer’s schedule. Many applications call for inspection each season and fluid\/filter changes around 100–200 hours or annually. Use the specified fluid and verify cooler flow.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide engine serial and model designation, rotation (LH\/RH), fuel system type (FCC details), cooling type (fresh‑water heat exchanger vs. raw‑water), belt drive style, plus clear photos of the nameplate and the part being replaced.\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 parts by horsepower, year and model? Browse our Crusader collection and refine with the page’s Filter \u0026amp; Sort controls.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/crusader-service-maintenance-kits\" style=\"display:inline-block;padding:10px 14px;background:#0b6cff;color:#fff;text-decoration:none;border-radius:4px;\"\u003eBrowse All Crusader Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#555;\"\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":"belt-tensioner-fits-volvo-penta-4-3l-8-1l-pcm-crusader-replaces-3885250-3587858-ra068001","title":"Belt Tensioner for Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L Marine Engines – Replaces 3885250, 3587858, 3587859 and 3861010","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 aftermarket \u003cstrong\u003ebelt tensioner assembly\u003c\/strong\u003e is designed for selected Volvo Penta marine engines using the applicable serpentine-belt tensioner arrangement. Catalog references identify applications in the Volvo Penta 4.3L, 5.0L, 5.7L and 8.1L engine families.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, compare the part number and tensioner arrangement on your engine with the references and application information below. Model-family listings alone do not confirm fitment for every engine configuration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement belt tensioner assembly for selected Volvo Penta marine engines.\u003c\/li\u003e\n  \u003cli\u003eHelps maintain correct tension in the serpentine belt system.\u003c\/li\u003e\n  \u003cli\u003eSupplied as one individual tensioner assembly.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement; not an original Volvo Penta component.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eThe following manufacturer part numbers are listed as applicable references for this tensioner assembly. Confirm the number on your original part before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eManufacturer\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eReference Type\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\u003e3885250\u003c\/td\u003e\n        \u003ctd\u003ePrimary catalog reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3587858\u003c\/td\u003e\n        \u003ctd\u003eApplication reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3587859\u003c\/td\u003e\n        \u003ctd\u003eApplication reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3861010\u003c\/td\u003e\n        \u003ctd\u003eApplication reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe catalog application references below are grouped by engine family. Check your exact model designation, belt routing and original tensioner before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Volvo Penta Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine Models Listed\u003c\/th\u003e\n        \u003cth\u003eEngine Family\u003c\/th\u003e\n        \u003cth\u003eSystem\u003c\/th\u003e\n        \u003cth\u003eApplicable Reference\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\u003e4.3 GL, 4.3 GXI, 4.3 GI, 4.3 OSI\u003c\/td\u003e\n        \u003ctd\u003e4.3L\u003c\/td\u003e\n        \u003ctd\u003eMarine serpentine-belt system\u003c\/td\u003e\n        \u003ctd\u003e3885250 \/ 3587858\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e5.0 GXI, 5.0 GI, 5.0 OSI\u003c\/td\u003e\n        \u003ctd\u003e5.0L\u003c\/td\u003e\n        \u003ctd\u003eMarine serpentine-belt system\u003c\/td\u003e\n        \u003ctd\u003e3885250 \/ 3587858\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e5.7 GI, 5.7 GXI, 5.7 OSI\u003c\/td\u003e\n        \u003ctd\u003e5.7L\u003c\/td\u003e\n        \u003ctd\u003eMarine serpentine-belt system\u003c\/td\u003e\n        \u003ctd\u003e3885250 \/ 3587858\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e8.1 GI, 8.1 GXI, 8.1 IPSCE, 8.1 OSI\u003c\/td\u003e\n        \u003ctd\u003e8.1L\u003c\/td\u003e\n        \u003ctd\u003eMarine serpentine-belt system\u003c\/td\u003e\n        \u003ctd\u003e3885250 \/ 3587859 \/ 3861010\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\u003eSerpentine belt tensioner assembly\u003c\/dd\u003e\n  \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n  \u003cdd\u003eSingle replacement assembly\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Volvo Penta marine engines with the matching belt-tensioner arrangement\u003c\/dd\u003e\n  \u003cdt\u003ePart Type\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Belt tensioner assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and allow the engine to cool before beginning work.\u003c\/li\u003e\n  \u003cli\u003eConfirm that the replacement tensioner matches the original part and belt-routing arrangement.\u003c\/li\u003e\n  \u003cli\u003eUse the appropriate serpentine-belt tool or breaker bar to release belt tension.\u003c\/li\u003e\n  \u003cli\u003eRemove the belt from the tensioner and note its routing before disassembly.\u003c\/li\u003e\n  \u003cli\u003eRemove the original tensioner and retain any hardware that must be reused, unless replacement hardware is specified by the service information.\u003c\/li\u003e\n  \u003cli\u003eClean the mounting surface and install the replacement tensioner in the original position.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting fasteners to the engine manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eRoute the belt according to the engine service manual and slowly release the tensioner.\u003c\/li\u003e\n  \u003cli\u003eCheck that the belt is fully seated and aligned on every pulley before starting the engine.\u003c\/li\u003e\n  \u003cli\u003eAfter startup, inspect belt tracking and listen for abnormal noise.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n  \u003cp\u003eMatch the exact number on your original tensioner with the listed references, then confirm the engine model and belt arrangement. The 4.3L, 5.0L, 5.7L and 8.1L engine families contain multiple configurations, so the model family alone is not sufficient.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a worn tensioner?\u003c\/summary\u003e\n  \u003cp\u003ePossible symptoms include belt squealing or chirping, abnormal pulley noise, belt misalignment, uneven belt wear, visible wobble or excessive movement at the tensioner.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs a special tool required?\u003c\/summary\u003e\n  \u003cp\u003eA serpentine-belt tensioner tool or a suitable long-handled breaker bar is commonly used to release belt tension. Follow the procedures and safety requirements in your engine service manual.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this for a V-belt system?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for the matching serpentine-belt tensioner arrangement. It should not be used on an engine equipped with a different V-belt or accessory-drive configuration.\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 assembly intended for applications using the listed references. It is not manufactured or sold as an original Volvo Penta component.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat should I do if my engine model is not listed?\u003c\/summary\u003e\n  \u003cp\u003eDo not assume compatibility from engine displacement alone. Compare the original part number, mounting arrangement and belt routing, or contact the seller with the complete engine model and original tensioner information before ordering.\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, mounting configuration and belt routing before purchase.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and keep hands, clothing and tools away from moving belts and pulleys during testing.\u003c\/li\u003e\n  \u003cli\u003eUse the manufacturer's torque specifications and service procedures.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended if you are not familiar with marine engine accessory-drive service.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement and is not an Original Equipment Manufacturer component.\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 a wide range of marine service applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Information\u003c\/strong\u003e — Check part numbers and complete engine details before ordering to help ensure the correct replacement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e — Contact us with your engine model and original part information if you need help confirming an application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723799040315,"sku":"6D-8FRI-KFLZ","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/6D-8FRI-KFLZ.png?v=1763032095"}],"url":"https:\/\/seasierra.com\/collections\/crusader-4-stroke-320hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}