{"product_id":"volvo-914","title":"Volvo Penta Lower Gear Housing O-Ring - 3889784","description":"\u003cp\u003eThe \u003cstrong\u003eVolvo Penta 3889784 Lower Gear Housing O-Ring\u003c\/strong\u003e is a genuine OEM molded sealing ring used in compatible Volvo Penta sterndrive gear housing assemblies. This low-profile seal helps maintain gearcase oil integrity and reduce the risk of water intrusion where lower gear housing and intermediate housing components mate.\u003c\/p\u003e\n\u003cp\u003eThis part is commonly replaced whenever the lower gear housing is separated, inspected, resealed, or serviced as part of a gearcase pressure-test repair.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Volvo Penta lower gear housing sealing O-ring.\u003c\/li\u003e\n\u003cli\u003eVolvo Penta part number: \u003cstrong\u003e3889784\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eReplaces legacy Volvo Penta part number: \u003cstrong\u003e3841966\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eComponent type: \u003cstrong\u003emolded O-ring \/ mounting gasket\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed for compatible sterndrive lower gear housing sealing applications.\u003c\/li\u003e\n\u003cli\u003eHelps retain gear lubricant and block water intrusion.\u003c\/li\u003e\n\u003cli\u003eLow-profile static seal design.\u003c\/li\u003e\n\u003cli\u003eApproximate weight: \u003cstrong\u003e0.01 lb \/ 4.5 g\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eDesigned for marine gearcase service environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eDrive Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon application context includes compatible Volvo Penta sterndrive gear housing assemblies where \u003cstrong\u003e3889784\u003c\/strong\u003e or superseded number \u003cstrong\u003e3841966\u003c\/strong\u003e is listed in the parts diagram.\u003c\/p\u003e\n\u003cp\u003eVerify use on:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVolvo Penta sterndrive lower gear housings.\u003c\/li\u003e\n\u003cli\u003eIntermediate housing \/ lower gear housing sealing locations.\u003c\/li\u003e\n\u003cli\u003eGearcase reseal and pressure-test service.\u003c\/li\u003e\n\u003cli\u003eSterndrive service repairs where the parts schematic calls for this O-ring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this seal only where the Volvo Penta parts diagram for the exact drive model and serial number confirms \u003cstrong\u003e3889784\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by Volvo Penta drive model, serial number, gear housing style, diagram location, and companion sealing parts before ordering. Volvo Penta sterndrives can use different seals depending on the drive family, production range, gear housing revision, and service history.\u003c\/p\u003e\n\u003cp\u003eWhen servicing the gear housing, inspect related seals and gaskets at the same time, including nearby cover gaskets, shaft seals, drain\/fill plug seals, and any mating-surface O-rings listed in the same assembly.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this O-ring whenever the gear housing joint is opened, when resealing the lower gear unit, after a failed pressure or vacuum test, or when there are signs of gear oil leakage, water intrusion, flattened sealing surfaces, cuts, swelling, hardening, or distortion.\u003c\/p\u003e\n\u003cp\u003eA low-cost O-ring should not be reused if it has already been compressed in a gearcase joint.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eClean the aluminum sealing groove and mating surfaces completely before installation. Remove old oil, sealant residue, corrosion, grit, and marine growth from the groove so the new O-ring can sit flat without twisting or pinching.\u003c\/p\u003e\n\u003cp\u003eLightly lubricate the O-ring with clean marine gear oil before assembly. Seat the O-ring evenly in the groove, align the housings carefully, and tighten fasteners according to the Volvo Penta service procedure. After assembly, pressure-test and vacuum-test the gearcase before refilling with gear lubricant.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate \/ Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta 3889784\u003c\/strong\u003e — current supplied part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo Penta 3841966\u003c\/strong\u003e — legacy \/ superseded reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3889784 O-Ring\u003c\/strong\u003e — common catalog description\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLower Gear Housing Mounting Gasket\u003c\/strong\u003e — common application description\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis is a small seal with an important job. If the O-ring is pinched, reused, or installed into a dirty groove, the gearcase can fail a pressure test or allow water into the oil. When a Volvo Penta lower gear housing is apart, replacing the related seals at the same time is usually the cleanest way to protect the gearset, bearings, and shafts from water contamination.\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":43564038160420,"sku":"3889784","price":5.9,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/5259743f-8320-4fe6-9aa1-3a57b3a5a499.png?v=1781653624","url":"https:\/\/marisolmarine.com\/products\/volvo-914","provider":"Marisol Marine Company","version":"1.0","type":"link"}