{"product_id":"yamaha-lower-unit-assembly-689-45300-17-4d","title":"Yamaha Lower Unit Assembly - 689-45300-17-4D","description":"\u003cp\u003eThis product has been superseded by: \u003ca href=\"https:\/\/partsvu.com\/products\/yamaha-lower-unit-assembly-689-45300-18-8d\"\u003e689-45300-18-8D\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2 data-section-id=\"1ee3dl0\" data-start=\"0\" data-end=\"74\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3\" data-end=\"74\"\u003eYamaha - Lower Unit Assembly - Gearcase Component - 689-45300-17-4D\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=\"726\"\u003eThe lower unit assembly is a critical component of your Yamaha outboard, responsible for transferring engine power to the propeller for efficient propulsion. Engineered with precision, this assembly ensures smooth gear engagement and consistent performance across a wide range of marine conditions. Its durable construction is designed to withstand corrosion, wear, and the demands of both freshwater and saltwater environments. Replacing a worn or damaged lower unit helps restore optimal handling, smooth shifting, and reliable engine operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"728\" data-end=\"731\"\u003e\n\u003ch2 data-section-id=\"1j5qwet\" data-start=\"733\" data-end=\"752\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"736\" data-end=\"752\"\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-start=\"754\" data-end=\"1155\"\u003e\n\u003cli data-section-id=\"1tzzec3\" data-start=\"754\" data-end=\"857\"\u003e\n\u003cstrong data-start=\"756\" data-end=\"786\"\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=\"858\" data-end=\"951\"\u003e\n\u003cstrong data-start=\"860\" data-end=\"891\"\u003eSmooth Shifting Performance\u003c\/strong\u003e – Supports forward, neutral, and reverse gear engagement.\u003c\/li\u003e\n\u003cli data-section-id=\"h4xyld\" data-start=\"952\" data-end=\"1051\"\u003e\n\u003cstrong data-start=\"954\" data-end=\"985\"\u003eDurable Marine Construction\u003c\/strong\u003e – Built to resist corrosion and harsh environmental conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"192lgcc\" data-start=\"1052\" data-end=\"1155\"\u003e\n\u003cstrong data-start=\"1054\" data-end=\"1076\"\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=\"1270\" data-end=\"1273\"\u003e\n\u003ch2 data-section-id=\"1ww02hn\" data-start=\"1275\" data-end=\"1309\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1278\" data-end=\"1309\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1311\" data-end=\"1423\"\u003eCompatible with Yamaha outboards using this lower unit assembly within the \u003cstrong data-start=\"1386\" data-end=\"1422\"\u003edrive system \/ gearcase assembly\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1425\" data-end=\"1428\"\u003e\n\u003ch2 data-section-id=\"elc90z\" data-start=\"1430\" data-end=\"1440\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1433\" data-end=\"1440\"\u003eFAQ\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1442\" data-end=\"1569\"\u003e\u003cstrong data-start=\"1442\" data-end=\"1484\"\u003eQ: What does a lower unit assembly do?\u003c\/strong\u003e\u003cbr data-start=\"1484\" data-end=\"1487\"\u003eA: It transfers engine power to the propeller and houses the gears for propulsion.\u003c\/p\u003e\n\u003cp data-start=\"1571\" data-end=\"1711\"\u003e\u003cstrong data-start=\"1571\" data-end=\"1626\"\u003eQ: What are signs the lower unit needs replacement?\u003c\/strong\u003e\u003cbr data-start=\"1626\" data-end=\"1629\"\u003eA: Grinding noise, vibration, shifting issues, or water contamination in gear oil.\u003c\/p\u003e\n\u003cp data-start=\"1713\" data-end=\"1831\"\u003e\u003cstrong data-start=\"1713\" data-end=\"1770\"\u003eQ: Will replacing the lower unit improve performance?\u003c\/strong\u003e\u003cbr data-start=\"1770\" data-end=\"1773\"\u003eA: Yes, especially if the current unit is worn or damaged.\u003c\/p\u003e\n\u003cp data-start=\"1833\" data-end=\"1935\"\u003e\u003cstrong data-start=\"1833\" data-end=\"1868\"\u003eQ: Is this a complete assembly?\u003c\/strong\u003e\u003cbr data-start=\"1868\" data-end=\"1871\"\u003eA: Yes, it is a full gearcase assembly designed for replacement.\u003c\/p\u003e\n\u003cp data-start=\"1937\" data-end=\"2056\"\u003e\u003cstrong data-start=\"1937\" data-end=\"1970\"\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"1970\" data-end=\"1973\"\u003eA: It typically requires mechanical experience and is often handled by technicians.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46938247233827,"sku":"689-45300-17-4D","price":1121.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV234757.jpg?v=1698804772","url":"https:\/\/partsvu.com\/en-ca\/products\/yamaha-lower-unit-assembly-689-45300-17-4d","provider":"PartsVu","version":"1.0","type":"link"}