{"product_id":"mercury-mercruiser-upper-driveshaft-bearing-fits-ia-ib-ic-ez-shift-120-140-160-mr-alpha-one-gen-ii-31-8m0146566","title":"Mercury – Upper Driveshaft Bearing Cup Cone | Multi-Series Drivetrain Component | Marine Alloy | 8M0146566","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Upper Driveshaft Bearing Cup Cone | Multi-Series Drivetrain Component | Marine Alloy | 8M0146566\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Anyone who has spent enough time on the water knows that the smoothness of an outboard is something you can feel through the entire boat. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen the drivetrain is healthy, everything \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ejust\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e responds the way it should — clean shifts, steady thrust, no surprises.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e The Quicksilver 8M0146566 Upper Driveshaft Bearing Cup Cone is one of those hidden-but-critical parts that keeps that feeling alive. It supports the heart of the gearcase, helping the driveshaft stay aligned and running true, so you can focus on the water ahead instead of worrying about what is happening below the surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhether you are easing away from the dock or punching the throttle on open water, this is the kind of part that gives you confidence every single outing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSupports the upper driveshaft for smooth, stable gearcase operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt from durable marine-grade alloy to withstand heat, load, and constant motion\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for precise, factory-spec fitment in a wide range of Mercury outboards and sterndrive systems\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHelps maintain proper alignment and reduces wear in the drivetrain\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eStraightforward installation using standard shop tools\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits select Mercury 115-450hp FourStroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCompatible with Mercury Racing engines, including Sport XS and Pro Max models\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks with Verado, Jet, EFI, and Direct Fuel Injection outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eAlso fits select IA, IB, IC, EZ Shift, 120, 140, 160, MR, Alpha One, and Alpha One Gen II sterndrive platforms (serial No. 0K999999 and below)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for fishing boats, performance hulls, pontoons, and family runabouts needing reliable drivetrain support\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e A worn or poorly fitted bearing cup can create all sorts of issues — vibration, sloppy shifting, even premature gear wear. With the 8M0146566 bearing cup cone \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003einstalled properly\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, the driveshaft stays tight, centered, and steady inside the gearcase. You will notice the difference the moment you drop into gear: shifts feel more controlled, acceleration feels smoother, and the whole engine runs with that solid, confident tone you want from a Mercury Marine powerplant.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMarine environments are unforgiving, which is why this part \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis engineered\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e with materials that stand up to corrosion, heavy load, and constant rotation. Once it \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis installed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, it provides long-lasting stability so you can rely on your engine season after season without second-guessing the drivetrain.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e With drivetrain components, precision is everything. The difference between an OEM component and an aftermarket substitute is not just material quality — it is the exactness of the fit. This Mercury Marine part number 8M0146566 \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis built\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to match original engineering specifications down to the thousandth, which means it installs correctly the first time and performs consistently under real-world loads.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eChoosing OEM also means choosing durability, proper alignment, and long-term reliability. When fellow boaters ask what to use inside the gearcase, this is the kind of part you recommend because you know it has been tested in the same \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003etough\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e conditions you run in.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ Section\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which Mercury engines does this bearing cup cone fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits select 115-450hp Mercury FourStroke outboards and a wide range of Mercury Racing, Verado, Jet, EFI, and DFI engines.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What sets this apart from aftermarket parts?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It meets Mercury’s original specifications, ensuring perfect alignment, long-term durability, and smooth drivetrain performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it fits my exact setup?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your owner’s or service manual; compatibility varies by serial number and engine family.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can this part handle saltwate\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003er?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — it is made from corrosion-resistant marine alloy and is fully suited for both freshwater and saltwater use.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation simple?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMost owners familiar with lower-unit work can install it \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eusing\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ecommon\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e shop tools, though many prefer a technician \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003efor\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e drivetrain components.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46932449820963,"sku":"31-8M0146566","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0146566_Main.jpg?v=1760631429","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-mercruiser-upper-driveshaft-bearing-fits-ia-ib-ic-ez-shift-120-140-160-mr-alpha-one-gen-ii-31-8m0146566","provider":"PartsVu","version":"1.0","type":"link"}