{"product_id":"yamaha-gear-2-6h4-45571-01-00","title":"Yamaha - Gear 2 - 6H4-45571-01-00","description":"\u003ch2 data-section-id=\"1k2o3qr\" data-start=\"0\" data-end=\"68\"\u003eYamaha - Gear 2 - Lower Unit Gearcase Component - 6H4-45571-01-00\u003c\/h2\u003e\n\u003chr data-start=\"70\" data-end=\"73\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"75\" data-end=\"86\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"87\" data-end=\"511\"\u003eWhen you’re dealing with gearcase issues, it’s usually not something minor, and gears like this are right at the center of it. I’ve torn down lower units where worn or chipped gears were the reason for noise, slipping, or failure to stay in gear. It’s not a quick fix job, but replacing the right components makes all the difference. When everything is set up correctly again, the motor runs smooth and quiet like it should.\u003c\/p\u003e\n\u003chr data-start=\"513\" data-end=\"516\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"518\" data-end=\"533\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"534\" data-end=\"1006\"\u003e\n\u003cli data-section-id=\"1jsblny\" data-start=\"534\" data-end=\"638\"\u003ePrecision Gear Engagement – Transfers power within the lower unit for smooth and reliable operation.\u003c\/li\u003e\n\u003cli data-section-id=\"vm8ruj\" data-start=\"639\" data-end=\"730\"\u003eHardened Gear Construction – Built to handle load and resist wear under continuous use.\u003c\/li\u003e\n\u003cli data-section-id=\"n6gg9v\" data-start=\"731\" data-end=\"816\"\u003eOEM-Spec Machining – Designed to Yamaha tolerances for proper mesh and alignment.\u003c\/li\u003e\n\u003cli data-section-id=\"1dc2lne\" data-start=\"817\" data-end=\"905\"\u003eConsistent Power Delivery – Supports steady propulsion without slipping or grinding.\u003c\/li\u003e\n\u003cli data-section-id=\"cweggm\" data-start=\"906\" data-end=\"1006\"\u003eCritical Drivetrain Component – Essential for proper gearcase function and long-term durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1008\" data-end=\"1011\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1013\" data-end=\"1043\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1044\" data-end=\"1314\"\u003eDesigned for Yamaha outboards with compatible lower unit and gearcase assemblies. Commonly used in small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always verify compatibility with your specific engine and gearcase before installation.\u003c\/p\u003e\n\u003chr data-start=\"1316\" data-end=\"1319\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1321\" data-end=\"1327\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1329\" data-end=\"1472\"\u003e\u003cstrong data-start=\"1329\" data-end=\"1380\"\u003eQ: What are signs this gear is worn or damaged?\u003c\/strong\u003e\u003cbr data-start=\"1380\" data-end=\"1383\"\u003eA: Grinding noises, slipping out of gear, or metal in the gear oil are common indicators.\u003c\/p\u003e\n\u003cp data-start=\"1474\" data-end=\"1638\"\u003e\u003cstrong data-start=\"1474\" data-end=\"1537\"\u003eQ: Can I replace just one gear or do I need a full rebuild?\u003c\/strong\u003e\u003cbr data-start=\"1537\" data-end=\"1540\"\u003eA: It depends on wear—often multiple components are affected, so a full inspection is recommended.\u003c\/p\u003e\n\u003cp data-start=\"1640\" data-end=\"1769\"\u003e\u003cstrong data-start=\"1640\" data-end=\"1674\"\u003eQ: Is this a difficult repair?\u003c\/strong\u003e\u003cbr data-start=\"1674\" data-end=\"1677\"\u003eA: Yes, gearcase work requires precision and proper setup, including shimming and alignment.\u003c\/p\u003e\n\u003cp data-start=\"1771\" data-end=\"1899\"\u003e\u003cstrong data-start=\"1771\" data-end=\"1818\"\u003eQ: What causes gear damage in a lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1818\" data-end=\"1821\"\u003eA: Impact, lack of lubrication, or water intrusion are the most common causes.\u003c\/p\u003e\n\u003cp data-start=\"1901\" data-end=\"2047\"\u003e\u003cstrong data-start=\"1901\" data-end=\"1961\"\u003eQ: Should I replace bearings and seals at the same time?\u003c\/strong\u003e\u003cbr data-start=\"1961\" data-end=\"1964\"\u003eA: Absolutely, it’s best to service everything together while the gearcase is open.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937063457059,"sku":"6H4-45571-01-00","price":112.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV254607.jpg?v=1698800087","url":"https:\/\/partsvu.com\/en-ca\/products\/yamaha-gear-2-6h4-45571-01-00","provider":"PartsVu","version":"1.0","type":"link"}