{"product_id":"mercury-mercruiser-aeu-bravo-one-gear-housing-with-dual-water-pickup-1-36-1-50-1-65-ratio-fits-bravo-i-i-x-drives-1656-8866a63","title":"Mercury – Complete Gearcase | Bravo One \/ One X Series | Corrosion-Resistant Alloy | 8866A63","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Complete Gearcase | Bravo One \/ One X Series | Corrosion-Resistant Alloy | 8866A63\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 There’s a moment every boater knows — that quiet pause right before you throttle up, waiting for the boat to answer. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen everything is working \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ethe way\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e it should, the response is instant: smooth lift, clean power, and a feeling that the whole boat \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis tuned\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to your touch.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e That kind of confidence starts deep inside the drive system. The \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury Marine part number 8866A63 Complete Gearcase\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis built\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e for boaters who count on that feeling every time they leave the dock. Whether you’re carving through open water or easing into a slip at sunset, this gearcase \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis designed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to keep your Bravo One or One X running exactly the way it \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ewas meant\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to.\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\"\u003eComplete replacement gearcase for MerCruiser Bravo One (serial 0D649909 and up) and Bravo One X sterndrives\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCompatible with 1.36, 1.50, and 1.65 gear ratios\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDurable Tri-Paint protective system for long-term corrosion resistance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eXK360 low-copper alloy engineered to resist pitting and wear\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHeavy-duty forged gears and reinforced U-joint for reliable, long-term service\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned to meet OEM specifications for precise fit and smooth performance\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 MerCruiser Bravo One sterndrives (serial number 0D649909 and newer)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits Bravo One X sterndrives using 1.36, 1.50, and 1.65 gear ratios\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for performance boats, offshore cruisers, bowriders, sport runabouts, and high-horsepower recreational vessels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks for both single-engine and twin-engine applications\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 gearcase has a way of revealing itself — sloppy shifts, sluggish holeshot, and a subtle vibration that takes the fun out of an otherwise perfect day. Replacing it with the 8866A63 brings everything back into alignment. Shifts become crisp and confident, acceleration feels smooth and connected, and the boat responds to the helm with that steady, predictable feel you expect from a Bravo drive.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDurability is where this gearcase really shines. The forged gears \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eare designed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to handle the stress of high-output engines, while the low-copper alloy and multi-layer Tri-Paint system protect the housing from saltwater corrosion and years of heavy use. It’s the kind of design that lets you push the boat when you want to and relax when you need to — without worrying about what’s happening under the surface. Installation is clean and straightforward, and once mounted, the gearcase settles into its role with quiet, dependable strength.\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 When you’re talking about a major drivetrain component, there’s no room for guessing. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003egenuine Mercury Marine part\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e gives you the precision and reliability that aftermarket assemblies \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ejust\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e can’t match.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEvery surface, every internal angle, every coating thickness is engineered \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003earound\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the exact demands of a Bravo One or One X system.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Aftermarket versions may look similar, but they rarely offer the same corrosion protection or long-term gear strength. Choosing OEM means your boat runs the way the designers intended — tight, smooth, and ready for long days on the water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which systems does the Complete Gearcase 8866A63 fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits MerCruiser Bravo One sterndrives (serial 0D649909 and up) and Bravo One X drives using 1.36, 1.50, or 1.65 gear ratios.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this better than aftermarket gearcases?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e The materials and engineering. Mercury’s forged gears, corrosion-resistant alloy, and Tri-Paint coating deliver durability \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eaftermarket\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e options usually can’t match.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I know if this is the correct replacement?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your sterndrive model and gear ratio. If you have a Bravo One (0D649909 or newer) or a Bravo One X, this part number typically fits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in both saltwater and freshwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Absolutely. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s designed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to endure harsh saltwater conditions, so freshwater performance is no issue at all.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation straightforward?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes. As a complete assembly, installation follows standard Bravo One procedures and fits cleanly when paired with the correct drive series.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46941252059427,"sku":"1656-8866A63","price":6372.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/Gearcase_Bravo_I_Main.jpg?v=1760631271","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-mercruiser-aeu-bravo-one-gear-housing-with-dual-water-pickup-1-36-1-50-1-65-ratio-fits-bravo-i-i-x-drives-1656-8866a63","provider":"PartsVu","version":"1.0","type":"link"}