{"product_id":"yamaha-lower-unit-assembly-689-45300-18-8d","title":"Yamaha Lower Unit Assembly - 689-45300-18-8D","description":"\u003ch2 data-section-id=\"1bdza1z\" data-start=\"0\" data-end=\"74\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3\" data-end=\"74\"\u003eYamaha - Lower Unit Assembly - Gearcase Component - 689-45300-18-8D\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003chr data-start=\"76\" data-end=\"79\"\u003e\n\u003ch2 data-section-id=\"1og5t7q\" data-start=\"81\" data-end=\"96\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"84\" data-end=\"96\"\u003eOverview\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"139\" data-end=\"746\"\u003eThe lower unit assembly is a critical component of your Yamaha outboard, responsible for transferring engine power to the propeller for efficient propulsion. Built with Yamaha’s precision engineering, this assembly ensures smooth gear engagement, reliable shifting, and consistent performance on the water. Its durable construction is designed to withstand harsh marine environments, offering excellent resistance to corrosion and wear. Replacing a worn or damaged lower unit helps restore proper handling, improve efficiency, and maintain optimal engine performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"748\" data-end=\"751\"\u003e\n\u003ch2 data-section-id=\"1j5qwet\" data-start=\"753\" data-end=\"772\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"756\" data-end=\"772\"\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"774\" data-end=\"1171\"\u003e\n\u003cli data-section-id=\"1tzzec3\" data-start=\"774\" data-end=\"877\"\u003e\n\u003cstrong data-start=\"776\" data-end=\"806\"\u003eComplete Gearcase Assembly\u003c\/strong\u003e – Transfers engine power to the propeller for dependable propulsion.\u003c\/li\u003e\n\u003cli data-section-id=\"1xjav2y\" data-start=\"878\" data-end=\"971\"\u003e\n\u003cstrong data-start=\"880\" data-end=\"911\"\u003eSmooth Shifting Performance\u003c\/strong\u003e – Supports forward, neutral, and reverse gear engagement.\u003c\/li\u003e\n\u003cli data-section-id=\"brexuh\" data-start=\"972\" data-end=\"1067\"\u003e\n\u003cstrong data-start=\"974\" data-end=\"1005\"\u003eDurable Marine Construction\u003c\/strong\u003e – Built to resist corrosion and wear in harsh environments.\u003c\/li\u003e\n\u003cli data-section-id=\"192lgcc\" data-start=\"1068\" data-end=\"1171\"\u003e\n\u003cstrong data-start=\"1070\" data-end=\"1092\"\u003eOEM Yamaha Fitment\u003c\/strong\u003e – Designed to factory specifications for precise alignment and installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1283\" data-end=\"1286\"\u003e\n\u003ch2 data-section-id=\"1ww02hn\" data-start=\"1288\" data-end=\"1322\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1291\" data-end=\"1322\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1324\" data-end=\"1438\"\u003eCompatible with Yamaha outboards using this lower unit assembly within the \u003cstrong data-start=\"1399\" data-end=\"1435\"\u003edrive system \/ gearcase assembly\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1440\" data-end=\"1443\"\u003e\n\u003ch2 data-section-id=\"elc90z\" data-start=\"1445\" data-end=\"1455\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1448\" data-end=\"1455\"\u003eFAQ\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1457\" data-end=\"1584\"\u003e\u003cstrong data-start=\"1457\" data-end=\"1499\"\u003eQ: What does a lower unit assembly do?\u003c\/strong\u003e\u003cbr data-start=\"1499\" data-end=\"1502\"\u003eA: It transfers engine power to the propeller and houses the gears for propulsion.\u003c\/p\u003e\n\u003cp data-start=\"1586\" data-end=\"1726\"\u003e\u003cstrong data-start=\"1586\" data-end=\"1641\"\u003eQ: What are signs the lower unit needs replacement?\u003c\/strong\u003e\u003cbr data-start=\"1641\" data-end=\"1644\"\u003eA: Grinding noise, vibration, shifting issues, or water contamination in gear oil.\u003c\/p\u003e\n\u003cp data-start=\"1728\" data-end=\"1847\"\u003e\u003cstrong data-start=\"1728\" data-end=\"1785\"\u003eQ: Will replacing the lower unit improve performance?\u003c\/strong\u003e\u003cbr data-start=\"1785\" data-end=\"1788\"\u003eA: Yes, especially if the existing unit is worn or damaged.\u003c\/p\u003e\n\u003cp data-start=\"1849\" data-end=\"1951\"\u003e\u003cstrong data-start=\"1849\" data-end=\"1884\"\u003eQ: Is this a complete assembly?\u003c\/strong\u003e\u003cbr data-start=\"1884\" data-end=\"1887\"\u003eA: Yes, it is a full gearcase assembly designed for replacement.\u003c\/p\u003e\n\u003cp data-start=\"1953\" data-end=\"2072\"\u003e\u003cstrong data-start=\"1953\" data-end=\"1986\"\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"1986\" data-end=\"1989\"\u003eA: It typically requires mechanical experience and is often handled by technicians.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46938247135523,"sku":"689-45300-18-8D","price":1121.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV234760.jpg?v=1698804771","url":"https:\/\/partsvu.com\/en-mx\/products\/yamaha-lower-unit-assembly-689-45300-18-8d","provider":"PartsVu","version":"1.0","type":"link"}