{"product_id":"yamaha-lower-unit-assembly-6em-45300-00-8d","title":"Yamaha Lower Unit Assembly - 6EM-45300-00-8D","description":"\u003ch2 data-section-id=\"it24b8\" data-start=\"0\" data-end=\"80\"\u003eYamaha - Lower Unit Assembly - Gearcase \u0026amp; Propulsion System - 6EM-45300-00-8D\u003c\/h2\u003e\n\u003chr data-start=\"84\" data-end=\"87\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"91\" data-end=\"102\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"104\" data-end=\"530\"\u003eWhen a lower unit starts going, you feel it right away—noise, vibration, or just not getting the push you’re used to. I’ve swapped out enough of these to know that a solid, complete assembly saves time and headaches compared to piecing things together. This is the part of the motor that takes all the abuse below the waterline, so it needs to be right. Bolt it on, fill it up, and you’re back to running smooth and confident.\u003c\/p\u003e\n\u003chr data-start=\"534\" data-end=\"537\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"541\" data-end=\"556\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"558\" data-end=\"1115\"\u003e• \u003cstrong data-start=\"560\" data-end=\"590\"\u003eComplete Gearcase Assembly\u003c\/strong\u003e – Provides a fully assembled unit for straightforward replacement and reduced downtime.\u003cbr data-start=\"678\" data-end=\"682\"\u003e• \u003cstrong data-start=\"684\" data-end=\"709\"\u003eSmooth Power Transfer\u003c\/strong\u003e – Delivers consistent power from the driveshaft to the propeller for reliable performance.\u003cbr data-start=\"800\" data-end=\"804\"\u003e• \u003cstrong data-start=\"806\" data-end=\"837\"\u003eHeavy-Duty Internal Gearing\u003c\/strong\u003e – Built to handle torque loads under real-world boating conditions.\u003cbr data-start=\"905\" data-end=\"909\"\u003e• \u003cstrong data-start=\"911\" data-end=\"942\"\u003eCorrosion-Resistant Housing\u003c\/strong\u003e – Designed to stand up to constant water exposure in marine environments.\u003cbr data-start=\"1016\" data-end=\"1020\"\u003e• \u003cstrong data-start=\"1022\" data-end=\"1047\"\u003ePrecision Factory Fit\u003c\/strong\u003e – Matches Yamaha specifications for proper alignment and sealing.\u003c\/p\u003e\n\u003chr data-start=\"1119\" data-end=\"1122\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1126\" data-end=\"1156\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1158\" data-end=\"1499\"\u003eDesigned for Yamaha outboard engines requiring a complete lower unit replacement. Commonly used on mid to high horsepower Yamaha outboards across a wide range of boats, including fishing, recreational, and light commercial applications. Suitable for both freshwater and saltwater use where dependable propulsion and durability are essential.\u003c\/p\u003e\n\u003chr data-start=\"1503\" data-end=\"1506\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1510\" data-end=\"1516\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1520\" data-end=\"1683\"\u003e\u003cstrong data-start=\"1520\" data-end=\"1578\"\u003eQ: What are signs that the lower unit needs replacing?\u003c\/strong\u003e\u003cbr data-start=\"1578\" data-end=\"1582\"\u003eA: Grinding noise, water in the gear oil, loss of power, or excessive vibration are all common signs.\u003c\/p\u003e\n\u003cp data-start=\"1687\" data-end=\"1837\"\u003e\u003cstrong data-start=\"1687\" data-end=\"1733\"\u003eQ: Do I need to break in a new lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1733\" data-end=\"1737\"\u003eA: It’s a good idea to run it easy at first—vary speeds and avoid hard runs for the first few hours.\u003c\/p\u003e\n\u003cp data-start=\"1841\" data-end=\"2007\"\u003e\u003cstrong data-start=\"1841\" data-end=\"1874\"\u003eQ: Any tips for installation?\u003c\/strong\u003e\u003cbr data-start=\"1874\" data-end=\"1878\"\u003eA: Make sure the driveshaft and shift shaft align properly, and always check seals and gaskets before tightening everything down.\u003c\/p\u003e\n\u003cp data-start=\"2011\" data-end=\"2153\"\u003e\u003cstrong data-start=\"2011\" data-end=\"2051\"\u003eQ: How does it hold up in saltwater?\u003c\/strong\u003e\u003cbr data-start=\"2051\" data-end=\"2055\"\u003eA: It’s built for it, but regular rinsing and keeping up with gear oil changes will go a long way.\u003c\/p\u003e\n\u003cp data-start=\"2157\" data-end=\"2316\"\u003e\u003cstrong data-start=\"2157\" data-end=\"2213\"\u003eQ: Should I replace the water pump at the same time?\u003c\/strong\u003e\u003cbr data-start=\"2213\" data-end=\"2217\"\u003eA: Yes, it’s smart to do it while everything is apart—it saves time and prevents future tear-downs.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937339527459,"sku":"6EM-45300-00-8D","price":4775.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV248161.jpg?v=1698801396","url":"https:\/\/partsvu.com\/en-au\/products\/yamaha-lower-unit-assembly-6em-45300-00-8d","provider":"PartsVu","version":"1.0","type":"link"}