{"title":"Yamaha LF300 Outboard Lower Units Assemblies","description":"","products":[{"product_id":"yamaha-lower-unit-assembly-lf300-6cf-45300-a1-8d-see-description-for-applicable-model","title":"Yamaha - Lower Unit Assembly - LF300 - 6CF-45300-A1-8D See Description For Applicable Model","description":"\u003ch2 data-section-id=\"1aqp47p\" data-start=\"0\" data-end=\"62\"\u003eYamaha - Lower Unit Assembly - Lower Unit - 6CF-45300-A1-8D\u003c\/h2\u003e\n\u003chr data-start=\"64\" data-end=\"67\"\u003e\n\u003ch2 data-section-id=\"6lznae\" data-start=\"69\" data-end=\"82\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"83\" data-end=\"504\"\u003eOn the bigger Yamaha setups like the 300 horsepower range, the lower unit takes on serious load every time you push the throttle. If it’s worn or out of spec, you’ll feel it in vibration, noise, or rough shifting. I’ve swapped these out on high horsepower rigs and the difference is immediate—everything tightens up and runs smoother. When it’s right, the boat handles better and the power delivery feels clean and solid.\u003c\/p\u003e\n\u003chr data-start=\"506\" data-end=\"509\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"511\" data-end=\"528\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"529\" data-end=\"1025\"\u003e• \u003cstrong data-start=\"531\" data-end=\"566\"\u003eHigh Horsepower Gearcase Design\u003c\/strong\u003e – Built to handle the demands of large Yamaha outboards under load.\u003cbr data-start=\"634\" data-end=\"637\"\u003e• \u003cstrong data-start=\"639\" data-end=\"664\"\u003eSmooth Power Transfer\u003c\/strong\u003e – Delivers consistent propulsion with reliable gear engagement.\u003cbr data-start=\"728\" data-end=\"731\"\u003e• \u003cstrong data-start=\"733\" data-end=\"765\"\u003ePrecision Internal Alignment\u003c\/strong\u003e – Helps reduce vibration and ensures proper gear mesh.\u003cbr data-start=\"820\" data-end=\"823\"\u003e• \u003cstrong data-start=\"825\" data-end=\"852\"\u003eMarine-Grade Durability\u003c\/strong\u003e – Designed to withstand corrosion and harsh marine environments.\u003cbr data-start=\"917\" data-end=\"920\"\u003e• \u003cstrong data-start=\"922\" data-end=\"946\"\u003eFactory-Spec Fitment\u003c\/strong\u003e – Matches Yamaha standards for proper installation and dependable operation.\u003c\/p\u003e\n\u003chr data-start=\"1027\" data-end=\"1030\"\u003e\n\u003ch2 data-section-id=\"1b7w7ff\" data-start=\"1032\" data-end=\"1064\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1065\" data-end=\"1242\"\u003eDesigned for Yamaha outboard engines in the 300 horsepower class and similar high-output configurations. Commonly used on offshore, recreational, and performance-oriented boats.\u003c\/p\u003e\n\u003chr data-start=\"1244\" data-end=\"1247\"\u003e\n\u003ch2 data-section-id=\"x9bttf\" data-start=\"1249\" data-end=\"1257\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1259\" data-end=\"1409\"\u003e\u003cstrong data-start=\"1259\" data-end=\"1307\"\u003eQ: What are signs a lower unit is going bad?\u003c\/strong\u003e\u003cbr data-start=\"1307\" data-end=\"1310\"\u003e\u003cstrong data-start=\"1310\" data-end=\"1316\"\u003eA:\u003c\/strong\u003e Grinding noise, hard shifting, vibration, or water in the gear oil are common warning signs.\u003c\/p\u003e\n\u003cp data-start=\"1411\" data-end=\"1565\"\u003e\u003cstrong data-start=\"1411\" data-end=\"1475\"\u003eQ: Can I keep running the motor if the lower unit feels off?\u003c\/strong\u003e\u003cbr data-start=\"1475\" data-end=\"1478\"\u003e\u003cstrong data-start=\"1478\" data-end=\"1484\"\u003eA:\u003c\/strong\u003e It’s not recommended, as continued use can lead to more serious internal damage.\u003c\/p\u003e\n\u003cp data-start=\"1567\" data-end=\"1708\"\u003e\u003cstrong data-start=\"1567\" data-end=\"1608\"\u003eQ: Is this suitable for offshore use?\u003c\/strong\u003e\u003cbr data-start=\"1608\" data-end=\"1611\"\u003e\u003cstrong data-start=\"1611\" data-end=\"1617\"\u003eA:\u003c\/strong\u003e Yes, it’s built to handle long runs and demanding conditions with high horsepower engines.\u003c\/p\u003e\n\u003cp data-start=\"1710\" data-end=\"1852\"\u003e\u003cstrong data-start=\"1710\" data-end=\"1756\"\u003eQ: What should I check after installation?\u003c\/strong\u003e\u003cbr data-start=\"1756\" data-end=\"1759\"\u003e\u003cstrong data-start=\"1759\" data-end=\"1765\"\u003eA:\u003c\/strong\u003e Confirm alignment, fill with gear oil, and test shifting before running at full power.\u003c\/p\u003e\n\u003cp data-start=\"1854\" data-end=\"1979\"\u003e\u003cstrong data-start=\"1854\" data-end=\"1903\"\u003eQ: How often should I service the lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1903\" data-end=\"1906\"\u003e\u003cstrong data-start=\"1906\" data-end=\"1912\"\u003eA:\u003c\/strong\u003e Regular gear oil changes and inspections help extend its lifespan.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937600491811,"sku":"6CF-45300-A1-8D","price":5587.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6cf-45300-a1-8d.jpg?v=1698802354"},{"product_id":"yamaha-lower-unit-assembly-lf250-lf225-lf300-6cf-45300-06-8d-see-description-for-application-models","title":"Yamaha - Lower unit assembly - LF250 -  LF225 - LF300 - 6CF-45300-06-8D -  See Description For Application Models","description":"\u003ch2 data-section-id=\"reoxce\" data-start=\"0\" data-end=\"63\"\u003eYamaha - LF225 LF250 LF300 Lower Unit Assembly - 6CF-45300-06-8D\u003c\/h2\u003e\n\u003chr data-start=\"65\" data-end=\"68\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"70\" data-end=\"81\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"82\" data-end=\"478\"\u003eWhen you’re running bigger Yamaha offshore motors, the lower unit takes a beating every trip. It’s what puts all that power into the water, so when it’s solid, everything feels smooth and controlled. If you’ve ever dealt with a worn gearcase, you know how quickly performance drops off. Swapping in a complete assembly like this gets you back to running strong without second guessing your setup.\u003c\/p\u003e\n\u003chr data-start=\"480\" data-end=\"483\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"485\" data-end=\"500\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"501\" data-end=\"929\"\u003e• \u003cstrong data-start=\"503\" data-end=\"533\"\u003eComplete Gearcase Assembly\u003c\/strong\u003e – Transfers engine power efficiently to the propeller for reliable performance.\u003cbr data-start=\"613\" data-end=\"616\"\u003e• \u003cstrong data-start=\"618\" data-end=\"639\"\u003eOEM Precision Fit\u003c\/strong\u003e – Built to Yamaha specifications for proper alignment and smooth operation.\u003cbr data-start=\"715\" data-end=\"718\"\u003e• \u003cstrong data-start=\"720\" data-end=\"747\"\u003eHeavy Duty Construction\u003c\/strong\u003e – Designed to handle high horsepower loads and harsh marine environments.\u003cbr data-start=\"821\" data-end=\"824\"\u003e• \u003cstrong data-start=\"826\" data-end=\"851\"\u003eReady to Install Unit\u003c\/strong\u003e – Full assembly simplifies replacement without piecing components together.\u003c\/p\u003e\n\u003chr data-start=\"931\" data-end=\"934\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"936\" data-end=\"966\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"967\" data-end=\"1100\"\u003e• FL250 - 2010\u003cbr data-start=\"77\" data-end=\"80\"\u003e• LF225 - 2010-Current\u003cbr data-start=\"99\" data-end=\"102\"\u003e• LF250 - 2010-Current\u003cbr data-start=\"121\" data-end=\"124\"\u003e• FL300 - 2010\u003cbr data-start=\"138\" data-end=\"141\"\u003e• LF300 - 2010-Current\u003c\/p\u003e\n\u003chr data-start=\"1102\" data-end=\"1105\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1107\" data-end=\"1113\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1115\" data-end=\"1265\"\u003e\u003cstrong data-start=\"1115\" data-end=\"1168\"\u003eQ: What are signs the lower unit needs replacing?\u003c\/strong\u003e\u003cbr data-start=\"1168\" data-end=\"1171\"\u003e\u003cstrong data-start=\"1171\" data-end=\"1177\"\u003eA:\u003c\/strong\u003e Grinding noise, water in gear oil, or loss of forward or reverse gear are common signs.\u003c\/p\u003e\n\u003cp data-start=\"1267\" data-end=\"1429\"\u003e\u003cstrong data-start=\"1267\" data-end=\"1319\"\u003eQ: Can a damaged lower unit be repaired instead?\u003c\/strong\u003e\u003cbr data-start=\"1319\" data-end=\"1322\"\u003e\u003cstrong data-start=\"1322\" data-end=\"1328\"\u003eA:\u003c\/strong\u003e Minor issues can be repaired, but major internal damage is usually more reliable to replace بالكامل.\u003c\/p\u003e\n\u003cp data-start=\"1431\" data-end=\"1559\"\u003e\u003cstrong data-start=\"1431\" data-end=\"1473\"\u003eQ: Is this suitable for saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"1473\" data-end=\"1476\"\u003e\u003cstrong data-start=\"1476\" data-end=\"1482\"\u003eA:\u003c\/strong\u003e Yes, but regular flushing and inspection are important to prevent corrosion.\u003c\/p\u003e\n\u003cp data-start=\"1561\" data-end=\"1714\"\u003e\u003cstrong data-start=\"1561\" data-end=\"1607\"\u003eQ: Do I need to break in a new lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1607\" data-end=\"1610\"\u003e\u003cstrong data-start=\"1610\" data-end=\"1616\"\u003eA:\u003c\/strong\u003e Yes, it’s best to run it conservatively at first to allow internal components to settle properly.\u003c\/p\u003e\n\u003cp data-start=\"1716\" data-end=\"1842\"\u003e\u003cstrong data-start=\"1716\" data-end=\"1745\"\u003eQ: Any installation tips?\u003c\/strong\u003e\u003cbr data-start=\"1745\" data-end=\"1748\"\u003e\u003cstrong data-start=\"1748\" data-end=\"1754\"\u003eA:\u003c\/strong\u003e Make sure the driveshaft is aligned correctly and seals are properly seated before use.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937601736995,"sku":"6CF-45300-06-8D","price":5527.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV809620.jpg?v=1698802359"},{"product_id":"yamaha-lower-unit-assembly-f300-4-2l-v6-f250-f225-lf300-6ce-45300-05-8d-see-description-for-application-models","title":"Yamaha Lower Unit Assembly - F300 4.2L V6 - F250 - F225 - LF300  - 6CE-45300-05-8D - See Description For Application Models","description":"\u003ch2 data-section-id=\"1chhzn0\" data-start=\"277\" data-end=\"349\"\u003eYamaha - Lower Unit Assembly - Gearcase Component - F300 4.2L V6 - F250 - F225 - LF300 - 6CE-45300-05-8D\u003c\/h2\u003e\n\u003chr data-start=\"351\" data-end=\"354\"\u003e\n\u003ch2 data-section-id=\"6lznae\" data-start=\"356\" data-end=\"369\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"371\" data-end=\"811\"\u003eThe Yamaha Lower Unit Assembly | 6CE-45300-05-8D is built to deliver strong, consistent power transfer and reliable performance for high-horsepower Yamaha outboards. This assembly is what converts engine output into smooth propulsion, so when it starts to wear, you’ll feel it immediately—vibration, noise, or reduced efficiency. Designed for demanding marine conditions, it restores performance and keeps your engine running at its best.\u003c\/p\u003e\n\u003chr data-start=\"813\" data-end=\"816\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"818\" data-end=\"835\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"837\" data-end=\"929\"\u003e• \u003cstrong data-start=\"839\" data-end=\"876\"\u003eHigh-Performance Power Transfer –\u003c\/strong\u003e Ensures smooth propulsion and responsive handling.\u003c\/p\u003e\n\u003cp data-start=\"931\" data-end=\"1035\"\u003e• \u003cstrong data-start=\"933\" data-end=\"956\"\u003eOEM Fit Precision –\u003c\/strong\u003e Engineered to Yamaha specifications for seamless installation and alignment.\u003c\/p\u003e\n\u003cp data-start=\"1037\" data-end=\"1136\"\u003e• \u003cstrong data-start=\"1039\" data-end=\"1071\"\u003eComplete Gearcase Assembly –\u003c\/strong\u003e Pre-assembled for dependable operation and easier replacement.\u003c\/p\u003e\n\u003cp data-start=\"1138\" data-end=\"1244\"\u003e• \u003cstrong data-start=\"1140\" data-end=\"1178\"\u003eCorrosion-Resistant Construction –\u003c\/strong\u003e Built to withstand harsh saltwater and freshwater environments.\u003c\/p\u003e\n\u003chr data-start=\"1246\" data-end=\"1249\"\u003e\n\u003ch2 data-section-id=\"1b7w7ff\" data-start=\"1251\" data-end=\"1283\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1285\" data-end=\"1464\"\u003e• F250DET1X 2010\u003cbr data-start=\"1301\" data-end=\"1304\"\u003e• F250XCA 2010-Current\u003cbr data-start=\"1323\" data-end=\"1326\"\u003e• F225XCA 2010-Current\u003cbr data-start=\"1345\" data-end=\"1348\"\u003e• F225NCA 2014-Current\u003cbr data-start=\"1367\" data-end=\"1370\"\u003e• F225NCA2 Current\u003cbr data-start=\"1385\" data-end=\"1388\"\u003e• F300XCA 2010-Current\u003cbr\u003e• FL300BETX Current\u003cbr\u003e• F300BETU Current\u003cbr data-start=\"1444\" data-end=\"1447\"\u003e• F300BETX Current\u003c\/p\u003e\n\u003chr data-start=\"1466\" data-end=\"1469\"\u003e\n\u003ch2 data-section-id=\"w36ijk\" data-start=\"1471\" data-end=\"1480\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-start=\"1482\" data-end=\"1607\"\u003e\u003cstrong data-start=\"1482\" data-end=\"1531\"\u003eQ1: What are signs the lower unit is failing?\u003c\/strong\u003e\u003cbr data-start=\"1531\" data-end=\"1534\"\u003eA: Grinding noise, vibration, water in gear oil, or reduced propulsion.\u003c\/p\u003e\n\u003cp data-start=\"1609\" data-end=\"1748\"\u003e\u003cstrong data-start=\"1609\" data-end=\"1666\"\u003eQ2: Can I repair instead of replacing the lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1666\" data-end=\"1669\"\u003eA: Minor issues can be repaired, but full replacement is often more reliable.\u003c\/p\u003e\n\u003cp data-start=\"1750\" data-end=\"1860\"\u003e\u003cstrong data-start=\"1750\" data-end=\"1790\"\u003eQ3: Does this come ready to install?\u003c\/strong\u003e\u003cbr data-start=\"1790\" data-end=\"1793\"\u003eA: Yes, it’s a complete assembly designed for direct replacement.\u003c\/p\u003e\n\u003cp data-start=\"1862\" data-end=\"1988\"\u003e\u003cstrong data-start=\"1862\" data-end=\"1905\"\u003eQ4: Is this suitable for saltwater use?\u003c\/strong\u003e\u003cbr data-start=\"1905\" data-end=\"1908\"\u003eA: Yes, it’s built with corrosion-resistant materials for marine environments.\u003c\/p\u003e\n\u003cp data-start=\"1990\" data-end=\"2098\"\u003e\u003cstrong data-start=\"1990\" data-end=\"2024\"\u003eQ5: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"2024\" data-end=\"2027\"\u003eA: It’s manageable with experience, but proper alignment is critical.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937614188835,"sku":"6CE-45300-05-8D","price":5091.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV800840.jpg?v=1698802398"},{"product_id":"yamaha-lower-unit-assembly-lf300-lf350-fl350-6ax-45300-3a-8d-see-description-for-applicable-model","title":"Yamaha - Lower unit assembly  - LF300 - LF350 - FL350 - 6AX-45300-3A-8D - See Description For Applicable Model","description":"\u003ch2 data-section-id=\"1y42hh2\" data-start=\"94\" data-end=\"187\"\u003eYamaha - Lower Unit Assembly - Gearcase \u0026amp; Drive System - LF300 - LF350 - 6AX-45300-3A-8D \u003c\/h2\u003e\n\u003chr data-start=\"188\" data-end=\"191\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"193\" data-end=\"204\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"206\" data-end=\"716\"\u003eOn Yamaha’s larger offshore motors, the lower unit is doing the heavy lifting every time you throttle up. This assembly is built for LF300 and LF350 platforms, delivering smooth, consistent power transfer from the engine down to the prop. Whether you're running long offshore trips or pushing through rough water, having a solid gearcase underneath matters. If your current unit is worn or starting to show signs of failure, replacing it brings back that confident, steady performance you expect from a Yamaha.\u003c\/p\u003e\n\u003chr data-start=\"718\" data-end=\"721\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"723\" data-end=\"738\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"740\" data-end=\"1110\"\u003e• Heavy-Duty Gearcase Assembly – Designed to handle high horsepower loads and offshore use.\u003cbr data-start=\"831\" data-end=\"834\"\u003e• Efficient Power Transfer – Ensures smooth delivery of engine power to the propeller.\u003cbr data-start=\"920\" data-end=\"923\"\u003e• Corrosion-Resistant Build – Built to withstand harsh saltwater and marine conditions.\u003cbr data-start=\"1010\" data-end=\"1013\"\u003e• OEM Yamaha Fitment – Engineered to factory specs for proper alignment and reliable operation.\u003c\/p\u003e\n\u003chr data-start=\"1112\" data-end=\"1115\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1117\" data-end=\"1147\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1149\" data-end=\"1209\"\u003e• LF300 - 2007-2009\u003cbr data-start=\"1168\" data-end=\"1171\"\u003e• LF350 - 2007-2012\u003cbr data-start=\"1190\" data-end=\"1193\"\u003e• FL350 - 2010\u003c\/p\u003e\n\u003chr data-start=\"1211\" data-end=\"1214\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1216\" data-end=\"1222\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1224\" data-end=\"1374\"\u003e\u003cstrong data-start=\"1224\" data-end=\"1277\"\u003eQ: What are signs a lower unit needs replacement?\u003c\/strong\u003e\u003cbr data-start=\"1277\" data-end=\"1280\"\u003eA: Grinding noise, vibration, shifting issues, or water in the gear oil are common indicators.\u003c\/p\u003e\n\u003cp data-start=\"1376\" data-end=\"1495\"\u003e\u003cstrong data-start=\"1376\" data-end=\"1422\"\u003eQ: Is this a complete lower unit assembly?\u003c\/strong\u003e\u003cbr data-start=\"1422\" data-end=\"1425\"\u003eA: Yes, it’s a full gearcase assembly designed for direct replacement.\u003c\/p\u003e\n\u003cp data-start=\"1497\" data-end=\"1660\"\u003e\u003cstrong data-start=\"1497\" data-end=\"1554\"\u003eQ: Will replacing the lower unit improve performance?\u003c\/strong\u003e\u003cbr data-start=\"1554\" data-end=\"1557\"\u003eA: If your current unit is worn or damaged, it will restore smooth operation and proper power transfer.\u003c\/p\u003e\n\u003cp data-start=\"1662\" data-end=\"1778\"\u003e\u003cstrong data-start=\"1662\" data-end=\"1695\"\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"1695\" data-end=\"1698\"\u003eA: It’s a more advanced repair and typically handled by experienced technicians.\u003c\/p\u003e\n\u003cp data-start=\"1780\" data-end=\"1915\"\u003e\u003cstrong data-start=\"1780\" data-end=\"1818\"\u003eQ: Are these updated part numbers?\u003c\/strong\u003e\u003cbr data-start=\"1818\" data-end=\"1821\"\u003eA: Yes, these assemblies supersede earlier versions while maintaining proper fit and function.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937842581795,"sku":"6AX-45300-3A-8D","price":8235.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6ax-45300-3a-8d.jpg?v=1698803370"}],"url":"https:\/\/partsvu.com\/en-ca\/collections\/yamaha-lf300-outboard-lower-units-assemblies.oembed","provider":"PartsVu","version":"1.0","type":"link"}