{"product_id":"mercury-mercruiser-aeu-alpha-one-gen-ii-gear-housing-2-00-ratio-counter-rotation-fits-alpha-one-gen-ii-1623-815822a52","title":"Mercury – Quicksilver 815822A52 Complete Counter-Rotation (LH) Gearcase | Alpha One Gen II Sterndrives | 2.00 Gear Ratio | 815822A52","description":"\u003cp data-start=\"0\" data-end=\"138\"\u003e\u003cstrong data-start=\"0\" data-end=\"136\"\u003eMercury – Quicksilver 815822A52 Complete Counter-Rotation (LH) Gearcase | Alpha One Gen II Sterndrives | 2.00 Gear Ratio | 815822A52\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"140\" data-end=\"143\"\u003e\n\u003ch3 data-start=\"145\" data-end=\"163\"\u003e\u003cstrong data-start=\"149\" data-end=\"161\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"164\" data-end=\"601\"\u003eWhen it’s time to replace or upgrade your drive, the \u003cstrong data-start=\"217\" data-end=\"280\"\u003eQuicksilver 815822A52 Counter-Rotation (Left-Hand) Gearcase\u003c\/strong\u003e delivers the same performance and reliability as the original — because it \u003cem data-start=\"356\" data-end=\"360\"\u003eis\u003c\/em\u003e built to those same factory specs. Designed for \u003cstrong data-start=\"409\" data-end=\"468\"\u003eMerCruiser and Quicksilver Alpha One Gen II sterndrives\u003c\/strong\u003e with a \u003cstrong data-start=\"476\" data-end=\"497\"\u003e2.00:1 gear ratio\u003c\/strong\u003e, this complete gearcase restores smooth shifting, strong acceleration, and dependable power transfer.\u003c\/p\u003e\n\u003cp data-start=\"603\" data-end=\"854\"\u003eFrom the casting to the gears inside, every part is built to handle the demands of real boating — whether you’re running long coastal trips, towing, or spending weekends on the lake. It’s the kind of replacement you install once and trust for years.\u003c\/p\u003e\n\u003chr data-start=\"856\" data-end=\"859\"\u003e\n\u003ch3 data-start=\"861\" data-end=\"883\"\u003e\u003cstrong data-start=\"865\" data-end=\"881\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"886\" data-end=\"1005\"\u003e\n\u003cstrong data-start=\"886\" data-end=\"898\"\u003ePurpose:\u003c\/strong\u003e Complete OEM counter-rotation (LH) gearcase designed to restore or upgrade Alpha One Gen II sterndrives.\u003c\/li\u003e\n\u003cli data-start=\"1008\" data-end=\"1114\"\u003e\n\u003cstrong data-start=\"1008\" data-end=\"1020\"\u003eFitment:\u003c\/strong\u003e For \u003cstrong data-start=\"1025\" data-end=\"1084\"\u003eMerCruiser and Quicksilver Alpha One Gen II sterndrives\u003c\/strong\u003e with \u003cstrong data-start=\"1090\" data-end=\"1111\"\u003e2.00:1 gear ratio\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1117\" data-end=\"1233\"\u003e\n\u003cstrong data-start=\"1117\" data-end=\"1134\"\u003eConstruction:\u003c\/strong\u003e Built from \u003cstrong data-start=\"1146\" data-end=\"1172\"\u003eXK360 low-copper alloy\u003c\/strong\u003e, engineered to resist corrosion and withstand high torque.\u003c\/li\u003e\n\u003cli data-start=\"1236\" data-end=\"1373\"\u003e\n\u003cstrong data-start=\"1236\" data-end=\"1261\"\u003eCorrosion Protection:\u003c\/strong\u003e Finished with Mercury’s \u003cstrong data-start=\"1286\" data-end=\"1306\"\u003eTri-Paint system\u003c\/strong\u003e, creating a tough, multi-layer barrier against saltwater damage.\u003c\/li\u003e\n\u003cli data-start=\"1376\" data-end=\"1483\"\u003e\n\u003cstrong data-start=\"1376\" data-end=\"1386\"\u003eGears:\u003c\/strong\u003e Precision \u003cstrong data-start=\"1397\" data-end=\"1429\"\u003espiral-cut steel bevel gears\u003c\/strong\u003e provide smooth, quiet operation and long gear life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1485\" data-end=\"1488\"\u003e\n\u003ch3 data-start=\"1490\" data-end=\"1527\"\u003e\u003cstrong data-start=\"1494\" data-end=\"1525\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1530\" data-end=\"1650\"\u003eCompatible with \u003cstrong data-start=\"1546\" data-end=\"1605\"\u003eMerCruiser and Quicksilver Alpha One Gen II sterndrives\u003c\/strong\u003e (counter-rotation LH models, 2.00:1 ratio)\u003c\/li\u003e\n\u003cli data-start=\"1653\" data-end=\"1736\"\u003eCommon on dual-engine cruisers, offshore sport boats, and sterndrive fishing rigs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1738\" data-end=\"1741\"\u003e\n\u003ch3 data-start=\"1743\" data-end=\"1785\"\u003e\u003cstrong data-start=\"1747\" data-end=\"1783\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1786\" data-end=\"2122\"\u003eThe \u003cstrong data-start=\"1790\" data-end=\"1803\"\u003e815822A52\u003c\/strong\u003e is a complete, ready-to-install gearcase that gives your boat factory-level handling and performance. The spiral-cut gears reduce vibration and noise while improving torque transfer under load. The advanced \u003cstrong data-start=\"2011\" data-end=\"2035\"\u003eXK360 aluminum alloy\u003c\/strong\u003e and \u003cstrong data-start=\"2040\" data-end=\"2061\"\u003eTri-Paint coating\u003c\/strong\u003e keep corrosion at bay, even in harsh saltwater conditions.\u003c\/p\u003e\n\u003cp data-start=\"2124\" data-end=\"2374\"\u003eYou’ll notice crisp shifting, smooth acceleration, and the same balance and thrust your boat had when it was brand new. This is a drop-in OEM assembly — no guessing, no modifications, just proven Mercury engineering that works right out of the box.\u003c\/p\u003e\n\u003chr data-start=\"2376\" data-end=\"2379\"\u003e\n\u003ch3 data-start=\"2381\" data-end=\"2402\"\u003e\u003cstrong data-start=\"2385\" data-end=\"2400\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2403\" data-end=\"2687\"\u003eGearcases are the backbone of your propulsion system — they take massive torque, speed, and water pressure. That’s why sticking with \u003cstrong data-start=\"2536\" data-end=\"2551\"\u003eMercury OEM\u003c\/strong\u003e is crucial. Every Quicksilver gearcase is built with the same alloys, machining tolerances, and hydrodynamic designs as the original.\u003c\/p\u003e\n\u003cp data-start=\"2689\" data-end=\"2983\"\u003eAftermarket gearcases might look similar, but they rarely match Mercury’s precision. Small differences in alignment or gear hardening can lead to noise, vibration, or even early failure. With OEM, you get the exact fit, proper alignment, and long-term durability that protect your investment.\u003c\/p\u003e\n\u003chr data-start=\"2985\" data-end=\"2988\"\u003e\n\u003ch3 data-start=\"2990\" data-end=\"3003\"\u003e\u003cstrong data-start=\"2994\" data-end=\"3001\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"3004\" data-end=\"3210\"\u003e\u003cstrong data-start=\"3004\" data-end=\"3064\"\u003eQ1: Which drives use the Quicksilver 815822A52 gearcase?\u003c\/strong\u003e\u003cbr data-start=\"3064\" data-end=\"3067\"\u003eA: It’s made for \u003cstrong data-start=\"3084\" data-end=\"3143\"\u003eMerCruiser and Quicksilver Alpha One Gen II sterndrives\u003c\/strong\u003e with \u003cstrong data-start=\"3149\" data-end=\"3170\"\u003e2.00:1 gear ratio\u003c\/strong\u003e and \u003cstrong data-start=\"3175\" data-end=\"3200\"\u003ecounter-rotation (LH)\u003c\/strong\u003e setups.\u003c\/p\u003e\n\u003cp data-start=\"3212\" data-end=\"3373\"\u003e\u003cstrong data-start=\"3212\" data-end=\"3252\"\u003eQ2: What’s included in the assembly?\u003c\/strong\u003e\u003cbr data-start=\"3252\" data-end=\"3255\"\u003eA: The complete \u003cstrong data-start=\"3271\" data-end=\"3300\"\u003ecounter-rotation gearcase\u003c\/strong\u003e, ready to install and prepped for standard Mercury rigging components.\u003c\/p\u003e\n\u003cp data-start=\"3375\" data-end=\"3548\"\u003e\u003cstrong data-start=\"3375\" data-end=\"3407\"\u003eQ3: What materials are used?\u003c\/strong\u003e\u003cbr data-start=\"3407\" data-end=\"3410\"\u003eA: The housing is cast from \u003cstrong data-start=\"3438\" data-end=\"3464\"\u003eXK360 low-copper alloy\u003c\/strong\u003e, finished with Mercury’s \u003cstrong data-start=\"3490\" data-end=\"3510\"\u003eTri-Paint system\u003c\/strong\u003e for long-term corrosion protection.\u003c\/p\u003e\n\u003cp data-start=\"3550\" data-end=\"3731\"\u003e\u003cstrong data-start=\"3550\" data-end=\"3611\"\u003eQ4: How is it different from standard-rotation gearcases?\u003c\/strong\u003e\u003cbr data-start=\"3611\" data-end=\"3614\"\u003eA: Counter-rotation (LH) gearcases are used on twin-engine setups to balance propeller torque and improve tracking.\u003c\/p\u003e\n\u003cp data-start=\"3733\" data-end=\"3915\"\u003e\u003cstrong data-start=\"3733\" data-end=\"3765\"\u003eQ5: Can I install it myself?\u003c\/strong\u003e\u003cbr data-start=\"3765\" data-end=\"3768\"\u003eA: A qualified marine technician is recommended for installation, but the case is a \u003cstrong data-start=\"3852\" data-end=\"3878\"\u003edirect OEM replacement\u003c\/strong\u003e and bolts up without modification.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46941263462691,"sku":"1623-815822A52","price":2960.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/815822A52_Main.jpg?v=1760631193","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-mercruiser-aeu-alpha-one-gen-ii-gear-housing-2-00-ratio-counter-rotation-fits-alpha-one-gen-ii-1623-815822a52","provider":"PartsVu","version":"1.0","type":"link"}