{"product_id":"yamaha-gear-1-assy-6h4-45560-01-00","title":"Yamaha - Gear 1 assy - 6H4-45560-01-00","description":"\u003ch2 data-section-id=\"17tenpq\" data-start=\"0\" data-end=\"77\"\u003eYamaha - Gear 1 Assembly - Lower Unit Gearcase Component - 6H4-45560-01-00\u003c\/h2\u003e\n\u003chr data-start=\"79\" data-end=\"82\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"84\" data-end=\"95\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"96\" data-end=\"502\"\u003eWhen you open up a lower unit and find gear damage, it’s usually not subtle—you’ll hear it and feel it when running. I’ve worked on plenty of Yamahas where worn gears caused rough engagement or that unmistakable grinding sound. This assembly is a key part of getting the drivetrain back to where it should be. Once it’s set up right, everything runs smoother, quieter, and more dependable out on the water.\u003c\/p\u003e\n\u003chr data-start=\"504\" data-end=\"507\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"509\" data-end=\"524\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"525\" data-end=\"1011\"\u003e\n\u003cli data-section-id=\"1y6muu5\" data-start=\"525\" data-end=\"636\"\u003eComplete Gear Assembly – Provides a ready-to-install solution for worn or damaged internal gear components.\u003c\/li\u003e\n\u003cli data-section-id=\"1xu1gyj\" data-start=\"637\" data-end=\"735\"\u003ePrecision Gear Mesh – Designed for proper engagement and smooth operation within the gearcase.\u003c\/li\u003e\n\u003cli data-section-id=\"4dc7zt\" data-start=\"736\" data-end=\"823\"\u003eHardened Construction – Built to withstand load, torque, and continuous marine use.\u003c\/li\u003e\n\u003cli data-section-id=\"3rzalu\" data-start=\"824\" data-end=\"914\"\u003eOEM-Spec Dimensions – Matches Yamaha tolerances for correct alignment and performance.\u003c\/li\u003e\n\u003cli data-section-id=\"1msidv7\" data-start=\"915\" data-end=\"1011\"\u003eReliable Power Transfer – Supports consistent propulsion without slipping or abnormal noise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1013\" data-end=\"1016\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1018\" data-end=\"1048\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1049\" data-end=\"1325\"\u003eDesigned for Yamaha outboards with compatible lower unit and gearcase assemblies. Commonly used on small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always verify compatibility with your specific engine and gearcase setup before installation.\u003c\/p\u003e\n\u003chr data-start=\"1327\" data-end=\"1330\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1332\" data-end=\"1338\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1340\" data-end=\"1497\"\u003e\u003cstrong data-start=\"1340\" data-end=\"1399\"\u003eQ: What are signs this gear assembly needs replacement?\u003c\/strong\u003e\u003cbr data-start=\"1399\" data-end=\"1402\"\u003eA: Grinding, knocking, slipping out of gear, or metal debris in gear oil are common indicators.\u003c\/p\u003e\n\u003cp data-start=\"1499\" data-end=\"1659\"\u003e\u003cstrong data-start=\"1499\" data-end=\"1563\"\u003eQ: Can I replace just this gear or do I need a full rebuild?\u003c\/strong\u003e\u003cbr data-start=\"1563\" data-end=\"1566\"\u003eA: It depends on overall wear, but it’s best to inspect the entire gearcase while it’s apart.\u003c\/p\u003e\n\u003cp data-start=\"1661\" data-end=\"1795\"\u003e\u003cstrong data-start=\"1661\" data-end=\"1696\"\u003eQ: Is this a difficult install?\u003c\/strong\u003e\u003cbr data-start=\"1696\" data-end=\"1699\"\u003eA: Yes, it requires proper setup, including shimming and alignment, to ensure correct operation.\u003c\/p\u003e\n\u003cp data-start=\"1797\" data-end=\"1914\"\u003e\u003cstrong data-start=\"1797\" data-end=\"1837\"\u003eQ: What usually causes gear failure?\u003c\/strong\u003e\u003cbr data-start=\"1837\" data-end=\"1840\"\u003eA: Impact damage, low or contaminated gear oil, and normal wear over time.\u003c\/p\u003e\n\u003cp data-start=\"1916\" data-end=\"2064\"\u003e\u003cstrong data-start=\"1916\" data-end=\"1976\"\u003eQ: Should I replace seals and bearings at the same time?\u003c\/strong\u003e\u003cbr data-start=\"1976\" data-end=\"1979\"\u003eA: Yes, it’s recommended to service all related components during a gearcase rebuild.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937063555363,"sku":"6H4-45560-01-00","price":136.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV254593.jpg?v=1698800088","url":"https:\/\/partsvu.com\/en-ca\/products\/yamaha-gear-1-assy-6h4-45560-01-00","provider":"PartsVu","version":"1.0","type":"link"}