{"product_id":"volvo-238","title":"Volvo Penta Shaft Coupling 21827365","description":"\u003cp\u003eVolvo Penta 21827365 is a genuine OEM shaft coupling used in inboard driveline installations. Current Volvo Penta parts references identify it as a \u003cstrong\u003eclamp-type propeller shaft coupling for 25 mm shaft diameter\u003c\/strong\u003e applications, and the strongest public application trail ties it to \u003cstrong\u003eD1 engines with MS10 and MS15 gearboxes\u003c\/strong\u003e. Current Volvo Penta references also show earlier part numbers \u003cstrong\u003e827924\u003c\/strong\u003e and \u003cstrong\u003e827925\u003c\/strong\u003e updating to \u003cstrong\u003e21827365\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Volvo Penta OEM shaft coupling, part number \u003cstrong\u003e21827365\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eClamp-type coupling for \u003cstrong\u003e25 mm propeller shaft\u003c\/strong\u003e applications.\u003c\/li\u003e\n\u003cli\u003eTwo-piece conic design for central alignment and strong torsional hold without shaft damage.\u003c\/li\u003e\n\u003cli\u003eDesigned for installation without tapering or keyway cutting on the shaft.\u003c\/li\u003e\n\u003cli\u003eCurrent reference dimensions: approximately \u003cstrong\u003e63 mm length\u003c\/strong\u003e, \u003cstrong\u003e102 mm diameter\u003c\/strong\u003e, and \u003cstrong\u003e3.1 kg weight\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe strongest supportable fitment trail for Volvo Penta 21827365 is with \u003cstrong\u003eD1 engine applications using MS10 or MS15 gearboxes\u003c\/strong\u003e. Public Volvo Penta coupling references specifically place this 25 mm clamp-type version in that engine and gearbox combination, so the safest fitment standard is the exact Volvo Penta driveline specification for the engine, gearbox, and shaft diameter being serviced.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eFitment can vary by engine version, gearbox, shaft diameter, and driveline configuration. Confirm Volvo Penta part number \u003cstrong\u003e21827365\u003c\/strong\u003e against the exact engine serial number, gearbox model, and \u003cstrong\u003e25 mm shaft size\u003c\/strong\u003e before ordering, especially on boats that may have had prior shaft, gearbox, or coupling changes.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this shaft coupling when the existing coupling shows fretting, distortion, loosening, corrosion, vibration-related wear, or damage from driveline misalignment. It is also a sensible replacement when upgrading or rebuilding a driveline where the shaft diameter and gearbox application match this exact Volvo Penta coupling specification.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis coupling is designed to simplify installation by avoiding taper machining and keyway cutting, but it still needs to be matched to the correct shaft size and driveline setup. Volvo Penta's public reference describes it as a two-piece conic coupling with alignment-focused design, so proper shaft preparation, correct shaft tolerance, and careful driveline alignment remain important during installation. Current Volvo Penta guidance for this coupling family notes a required shaft tolerance of \u003cstrong\u003eh9 (0 to -0.052 mm)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCurrent Volvo Penta parts references show \u003cstrong\u003e827924\u003c\/strong\u003e and \u003cstrong\u003e827925\u003c\/strong\u003e as earlier part numbers updated to \u003cstrong\u003e21827365\u003c\/strong\u003e. Use \u003cstrong\u003e21827365\u003c\/strong\u003e as the current primary OEM ordering number for this listing.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eShaft couplings are one of those parts that look simple until shaft diameter or gearbox details are slightly off. Matching the exact shaft size and gearbox combination first usually saves much more time than trying to make a near-match work during alignment.\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":43563989827620,"sku":"21827365","price":728.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/21827365.png?v=1772423386","url":"https:\/\/marisolmarine.com\/products\/volvo-238","provider":"Marisol Marine Company","version":"1.0","type":"link"}