{"product_id":"yamaha-lower-unit-assembly-150-175-200-64k-45300-02-na-see-description-for-applicable-models","title":"Yamaha Lower Unit Assembly - 150 - 175 - 200 - 64K-45300-02-NA - See Description for Applicable Models","description":"\u003ch2 data-section-id=\"1lkvj3w\" data-start=\"0\" data-end=\"77\"\u003eYamaha - Lower Unit Assembly - Gearcase \u0026amp; Power Transfer - 64K-45300-02-NA\u003c\/h2\u003e\n\u003chr data-start=\"79\" data-end=\"82\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"84\" data-end=\"95\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"96\" data-end=\"563\"\u003eWhen a lower unit starts slipping or getting noisy, it’s usually not something you want to patch—it’s time for a full replacement. This Yamaha lower unit assembly is built to bring back that solid, confident feel when you shift into gear. I’ve seen motors come back to life with a fresh gearcase like this, especially on bigger horsepower setups that get pushed hard. It’s all about getting smooth power down to the prop and keeping things running quiet and reliable.\u003c\/p\u003e\n\u003chr data-start=\"565\" data-end=\"568\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"570\" data-end=\"585\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"586\" data-end=\"1003\"\u003e\n\u003cli data-section-id=\"19yrus5\" data-start=\"586\" data-end=\"693\"\u003e\n\u003cstrong data-start=\"588\" data-end=\"618\"\u003eComplete Gearcase Assembly\u003c\/strong\u003e – Includes internal gears and housing for a full lower unit replacement.\u003c\/li\u003e\n\u003cli data-section-id=\"54khuy\" data-start=\"694\" data-end=\"797\"\u003e\n\u003cstrong data-start=\"696\" data-end=\"721\"\u003eSmooth Power Transfer\u003c\/strong\u003e – Designed to deliver consistent torque from the engine to the propeller.\u003c\/li\u003e\n\u003cli data-section-id=\"tygr0d\" data-start=\"798\" data-end=\"898\"\u003e\n\u003cstrong data-start=\"800\" data-end=\"827\"\u003eHeavy-Duty Construction\u003c\/strong\u003e – Built to handle high horsepower loads and harsh marine conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"wb4yf1\" data-start=\"899\" data-end=\"1003\"\u003e\n\u003cstrong data-start=\"901\" data-end=\"934\"\u003eReliable Shifting Performance\u003c\/strong\u003e – Provides clean gear engagement with reduced vibration and noise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1005\" data-end=\"1008\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1010\" data-end=\"1040\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1041\" data-end=\"1246\"\u003eDesigned for Yamaha outboard engines in the 150 to 200 horsepower range. Commonly used on offshore boats, center consoles, and larger recreational vessels that demand dependable performance and durability.\u003c\/p\u003e\n\u003chr data-start=\"1248\" data-end=\"1251\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1253\" data-end=\"1259\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1261\" data-end=\"1438\"\u003e\u003cstrong data-start=\"1261\" data-end=\"1319\"\u003eQ: What are the warning signs of a failing lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1319\" data-end=\"1322\"\u003e\u003cstrong data-start=\"1322\" data-end=\"1328\"\u003eA:\u003c\/strong\u003e Grinding sounds, difficulty shifting, water in the gear oil, or loss of forward or reverse are all red flags.\u003c\/p\u003e\n\u003cp data-start=\"1440\" data-end=\"1609\"\u003e\u003cstrong data-start=\"1440\" data-end=\"1481\"\u003eQ: Can I swap this lower unit myself?\u003c\/strong\u003e\u003cbr data-start=\"1481\" data-end=\"1484\"\u003e\u003cstrong data-start=\"1484\" data-end=\"1490\"\u003eA:\u003c\/strong\u003e If you’ve done basic lower unit work before, it’s manageable—but alignment and torque specs matter, so take your time.\u003c\/p\u003e\n\u003cp data-start=\"1611\" data-end=\"1764\"\u003e\u003cstrong data-start=\"1611\" data-end=\"1657\"\u003eQ: Do I need to break in a new lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1657\" data-end=\"1660\"\u003e\u003cstrong data-start=\"1660\" data-end=\"1666\"\u003eA:\u003c\/strong\u003e It’s a good idea to run it moderately at first and check gear oil after the initial hours of use.\u003c\/p\u003e\n\u003cp data-start=\"1766\" data-end=\"1945\"\u003e\u003cstrong data-start=\"1766\" data-end=\"1819\"\u003eQ: How does saltwater impact lower unit lifespan?\u003c\/strong\u003e\u003cbr data-start=\"1819\" data-end=\"1822\"\u003e\u003cstrong data-start=\"1822\" data-end=\"1828\"\u003eA:\u003c\/strong\u003e Salt can speed up corrosion, especially around seals and the housing, so regular flushing and inspection help a lot.\u003c\/p\u003e\n\u003cp data-start=\"1947\" data-end=\"2104\"\u003e\u003cstrong data-start=\"1947\" data-end=\"2004\"\u003eQ: Is this part still current or has it been updated?\u003c\/strong\u003e\u003cbr data-start=\"2004\" data-end=\"2007\"\u003e\u003cstrong data-start=\"2007\" data-end=\"2013\"\u003eA:\u003c\/strong\u003e This unit has been superseded by part number 64K-45300-03-NA, which is the latest version.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46938688225571,"sku":"64K-45300-02-NA","price":3025.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV227846.jpg?v=1698806271","url":"https:\/\/partsvu.com\/en-mx\/products\/yamaha-lower-unit-assembly-150-175-200-64k-45300-02-na-see-description-for-applicable-models","provider":"PartsVu","version":"1.0","type":"link"}