{"product_id":"yamaha-lower-unit-assy-6g5-45300-21-ek","title":"Yamaha - Lower unit assy - 6G5-45300-21-EK","description":"\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eYamaha Lower Unit Assembly – 6G5-45300-21-EK\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eOEM Yamaha Gearcase Replacement for Reliable Power and Performance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eThe Yamaha Lower Unit Assembly – 6G5-45300-21-EK is a genuine factory-assembled lower unit designed to restore smooth propulsion, durability, and factory-spec efficiency to your Yamaha outboard. This complete unit arrives pre-assembled with critical internal components—including driveshaft, shift shaft, gears, bearings, and seals—ensuring a precise fit and optimal performance right out of the box.\u003c\/p\u003e\n\u003cp\u003eBuilt to Yamaha’s exacting standards, this assembly provides corrosion resistance, dependable thrust, and long-lasting service life, making it the trusted choice for boaters facing gearcase damage, saltwater corrosion, or wear-related failure.\u003c\/p\u003e\n\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Yamaha Quality:\u003c\/strong\u003e Fully assembled by Yamaha for exact tolerances and reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Gearcase:\u003c\/strong\u003e Includes housing, driveshaft, shift shaft, gears, bearings, and seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Fit:\u003c\/strong\u003e No internal part transfers or guesswork required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Marine Construction:\u003c\/strong\u003e Built for saltwater resistance and heavy-load operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 6G5-45300-21-EK (superseded by 6G5-45300-23-EK)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eCompatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eDesigned for select Yamaha outboard motors, typically in the \u003cstrong\u003e90HP–115HP range\u003c\/strong\u003e. Always verify compatibility using your model year and Yamaha parts diagram, or consult a Yamaha-certified technician before ordering.\u003c\/p\u003e\n\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eIdeal Use Cases\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpact Damage:\u003c\/strong\u003e Replacement for cracked or severely damaged housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSaltwater Corrosion:\u003c\/strong\u003e Prevent performance loss from rusted or leaking seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Overhaul:\u003c\/strong\u003e A direct replacement to restore older Yamaha engines to factory reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eWhy Choose Genuine Yamaha?\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003eA lower unit is the heart of your propulsion system. Aftermarket or rebuilt units often compromise performance with mismatched tolerances or reused components. A genuine Yamaha assembly ensures watertight seals, smooth gear operation, and long-term reliability. With the 6G5-45300-21-EK, you eliminate the risks of guesswork and ensure your outboard runs like new.\u003c\/p\u003e\n\n\u003ch3 class=\"disclosure__title h5 mb-0\"\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this unit ship pre-filled with gear oil?\u003c\/strong\u003e\u003cbr\u003eNo. It is shipped dry and requires Yamaha-approved lower unit gear oil before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I install this unit myself?\u003c\/strong\u003e\u003cbr\u003eInstallation can be done by experienced boaters, but Yamaha recommends professional installation for correct alignment, torque, and seal integrity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHas this part been superseded?\u003c\/strong\u003e\u003cbr\u003eYes. The 6G5-45300-21-EK has been replaced by \u003cstrong\u003e6G5-45300-23-EK\u003c\/strong\u003e, which offers updated fitment and durability improvements.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937234440483,"sku":"6G5-45300-21-EK","price":3961.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV250294_2.jpg?v=1698800915","url":"https:\/\/partsvu.com\/en-ca\/products\/yamaha-lower-unit-assy-6g5-45300-21-ek","provider":"PartsVu","version":"1.0","type":"link"}