{"product_id":"volvo-802","title":"Volvo Penta Serpentine Belt Idler Pulley 3861009","description":"\u003cp\u003eVolvo Penta 3861009 is a genuine OEM pulley used in select Volvo Penta gasoline engine belt-drive assemblies. Current parts listings consistently identify it as a Volvo Penta pulley, and the strongest application detail available places it in the \u003cstrong\u003eserpentine belt and alternator\u003c\/strong\u003e assembly. Broader cross-reference sources also describe this part specifically as a \u003cstrong\u003eserpentine belt idler pulley\u003c\/strong\u003e for a wide range of Volvo Penta gas engines.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Volvo Penta OEM part number \u003cstrong\u003e3861009\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIdentified in current parts references as a \u003cstrong\u003epulley\u003c\/strong\u003e used in the \u003cstrong\u003eserpentine belt and alternator\u003c\/strong\u003e assembly.\u003c\/li\u003e\n\u003cli\u003eBroader application references describe it as a \u003cstrong\u003eserpentine belt idler pulley\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDealer weight references range from about \u003cstrong\u003e1.06 lb\u003c\/strong\u003e to heavier storefront-style listing weights, depending on seller format.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe strongest supportable fitment for 3861009 is within Volvo Penta \u003cstrong\u003egasoline serpentine-belt engine applications\u003c\/strong\u003e rather than a narrow diesel or single-model claim. Current cross-reference sources associate it with many \u003cstrong\u003e3.0L, 4.3L, 5.0L, 5.7L, and 8.1L\u003c\/strong\u003e gasoline engines, including various \u003cstrong\u003eGL, Gi, GXi, OSi, and OSXi\u003c\/strong\u003e family models. One current listing also shows a long compatibility range including models such as \u003cstrong\u003e3.0GLP-J, 3.0GXI-J, 4.3GXI-225-R, 4.3OSI-J, 5.0GXI-270-R, 5.0OSI-J, 5.7GI-300-N, 5.7GXI-JF, 5.7OSI-300-JF, 8.1GI-JF, 8.1GXI-GF, and 8.1OSIE-J\u003c\/strong\u003e. Because belt-drive hardware can vary by engine version, bracket arrangement, and production range, the safest fitment path is to match this pulley to the exact engine diagram and serial-number-based application before ordering.\u003c\/p\u003e\n\u003ch2\u003eSerial Number Fitment Notice\u003c\/h2\u003e\n\u003cp\u003eMatch Volvo Penta part number \u003cstrong\u003e3861009\u003c\/strong\u003e to your engine serial number and the correct Volvo Penta belt-drive or alternator diagram before ordering. Pulleys in serpentine systems can vary by accessory layout and bracket design, even within closely related gas-engine families.\u003c\/p\u003e\n\u003ch2\u003eWhen This Part Needs Replacement\u003c\/h2\u003e\n\u003cp\u003eThis pulley should be replaced when it shows bearing noise, wobble, belt-tracking issues, groove wear, corrosion, or damage found during belt-system service. It is also smart to inspect it anytime the serpentine belt, alternator area, or nearby front-engine accessories are already apart. This service guidance is a practical inference based on current references identifying it as a serpentine-belt pulley in the alternator assembly.\u003c\/p\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eConfirm the exact application in the correct Volvo Penta schematic before installation, and compare the removed pulley carefully against the replacement part. Inspect the belt, mounting point, and nearby accessory-drive hardware before reassembly. On serpentine-belt systems, exact pulley match matters more than a quick visual comparison.\u003c\/p\u003e\n\u003ch2\u003eAlternate\/Superseded Part Numbers\u003c\/h2\u003e\n\u003cp\u003eThe reviewed sources continue to list \u003cstrong\u003e3861009\u003c\/strong\u003e as the active Volvo Penta OEM number. Current aftermarket references treat it as the direct replacement target number for compatible idler-pulley replacements, but no clearly supported Volvo Penta superseded OEM number surfaced in the current source set.\u003c\/p\u003e\n\u003ch2\u003eParts Desk Insight\u003c\/h2\u003e\n\u003cp\u003eWith serpentine-belt pulleys like this, the easy mistake is matching only by diameter. Checking the exact belt layout first usually saves time, especially when Volvo Penta used similar-looking pulleys across several 3.0L, 4.3L, 5.0L, 5.7L, and 8.1L gas-engine setups.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43564033998884,"sku":"3861009","price":246.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/de3e176f-f105-4552-83c5-ae22232e8667.png?v=1776480508","url":"https:\/\/marisolmarine.com\/products\/volvo-802","provider":"Marisol Marine Company","version":"1.0","type":"link"}