{"product_id":"yamaha-lower-unit-assembly-6h3-45300-17-8d","title":"Yamaha Lower Unit Assembly - 6H3-45300-17-8D","description":"\u003ch2 data-section-id=\"mgz04h\" data-start=\"0\" data-end=\"80\"\u003eYamaha - Lower Unit Assembly - Gearcase \u0026amp; Propulsion System - 6H3-45300-17-8D\u003c\/h2\u003e\n\u003chr data-start=\"82\" data-end=\"85\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"87\" data-end=\"98\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"99\" data-end=\"510\"\u003eWhen a lower unit goes, you don’t always get much warning—and it usually happens at the worst time. I’ve replaced enough of these to know that a complete assembly saves a lot of guesswork compared to piecing things back together. It’s the backbone of how your motor puts power into the water, so everything has to be right. Swapping in a solid unit like this gets you back to running smooth and confident again.\u003c\/p\u003e\n\u003chr data-start=\"512\" data-end=\"515\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"517\" data-end=\"532\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"533\" data-end=\"1062\"\u003e\n\u003cli data-section-id=\"7tcsvd\" data-start=\"533\" data-end=\"635\"\u003eComplete Gearcase Assembly – Provides a full replacement solution for worn or damaged lower units.\u003c\/li\u003e\n\u003cli data-section-id=\"16a8ou5\" data-start=\"636\" data-end=\"748\"\u003eSmooth Power Transfer – Delivers consistent power from the engine to the propeller for reliable performance.\u003c\/li\u003e\n\u003cli data-section-id=\"m7fzrm\" data-start=\"749\" data-end=\"844\"\u003eFactory-Matched Fit – Built to Yamaha specifications for proper alignment and installation.\u003c\/li\u003e\n\u003cli data-section-id=\"hiv466\" data-start=\"845\" data-end=\"954\"\u003eDurable Internal Construction – Designed to handle load, impact, and continuous use in marine conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"111vl68\" data-start=\"955\" data-end=\"1062\"\u003eUpdated Replacement Part – Replaces earlier versions to maintain current performance and fit standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1064\" data-end=\"1067\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1069\" data-end=\"1099\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1100\" data-end=\"1372\"\u003eDesigned for Yamaha outboards using compatible gearcase and lower unit configurations. Commonly used on small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always verify compatibility with your specific engine and setup before installation.\u003c\/p\u003e\n\u003chr data-start=\"1374\" data-end=\"1377\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1379\" data-end=\"1385\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1387\" data-end=\"1549\"\u003e\u003cstrong data-start=\"1387\" data-end=\"1444\"\u003eQ: What are signs my lower unit needs to be replaced?\u003c\/strong\u003e\u003cbr data-start=\"1444\" data-end=\"1447\"\u003eA: Grinding noises, water in the gear oil, loss of power, or failure to stay in gear are common signs.\u003c\/p\u003e\n\u003cp data-start=\"1551\" data-end=\"1721\"\u003e\u003cstrong data-start=\"1551\" data-end=\"1608\"\u003eQ: Can I rebuild instead of replacing the whole unit?\u003c\/strong\u003e\u003cbr data-start=\"1608\" data-end=\"1611\"\u003eA: You can, but a full assembly is often faster and more reliable, especially if multiple components are worn.\u003c\/p\u003e\n\u003cp data-start=\"1723\" data-end=\"1883\"\u003e\u003cstrong data-start=\"1723\" data-end=\"1762\"\u003eQ: Does this come ready to install?\u003c\/strong\u003e\u003cbr data-start=\"1762\" data-end=\"1765\"\u003eA: It’s assembled, but you’ll still need to transfer components like the propeller and check alignment during install.\u003c\/p\u003e\n\u003cp data-start=\"1885\" data-end=\"2033\"\u003e\u003cstrong data-start=\"1885\" data-end=\"1931\"\u003eQ: How does saltwater affect a lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1931\" data-end=\"1934\"\u003eA: Saltwater can accelerate corrosion and wear, especially if not flushed and maintained regularly.\u003c\/p\u003e\n\u003cp data-start=\"2035\" data-end=\"2197\"\u003e\u003cstrong data-start=\"2035\" data-end=\"2091\"\u003eQ: Should I check anything else during installation?\u003c\/strong\u003e\u003cbr data-start=\"2091\" data-end=\"2094\"\u003eA: It’s a good time to inspect the water pump, seals, and shift linkage while everything is accessible.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937087705379,"sku":"6H3-45300-17-8D","price":2589.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV253849.jpg?v=1698800209","url":"https:\/\/partsvu.com\/fr-ca\/products\/yamaha-lower-unit-assembly-6h3-45300-17-8d","provider":"PartsVu","version":"1.0","type":"link"}