{"product_id":"yamaha-lower-unit-assembly-697-45300-12-8d","title":"Yamaha Lower Unit Assembly - 697-45300-12-8D","description":"\u003ch2 data-section-id=\"aac3bj\" data-start=\"0\" data-end=\"77\"\u003eYamaha - Lower Unit Assembly - Gearcase and Drive System - 697-45300-12-8D\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=\"562\"\u003eThe lower unit is where all the power actually hits the water, so when something’s off down there, you feel it right away. I’ve seen worn units cause vibration, slipping, or just poor overall performance that doesn’t match the engine. Swapping in a solid lower unit assembly like this brings everything back—smooth shifting, strong push, and dependable operation. It’s one of the biggest upgrades you can make when a motor starts showing its age below the waterline.\u003c\/p\u003e\n\u003chr data-start=\"564\" data-end=\"567\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"569\" data-end=\"584\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"585\" data-end=\"1006\"\u003e• \u003cstrong data-start=\"587\" data-end=\"617\"\u003eComplete Gearcase Assembly\u003c\/strong\u003e – Provides a full lower unit setup for reliable power transfer to the propeller.\u003cbr data-start=\"698\" data-end=\"701\"\u003e• \u003cstrong data-start=\"703\" data-end=\"729\"\u003eSmooth Gear Engagement\u003c\/strong\u003e – Supports clean shifting between forward, neutral, and reverse.\u003cbr data-start=\"794\" data-end=\"797\"\u003e• \u003cstrong data-start=\"799\" data-end=\"833\"\u003eHeavy-Duty Marine Construction\u003c\/strong\u003e – Built to handle impact, load, and constant submersion in harsh conditions.\u003cbr data-start=\"910\" data-end=\"913\"\u003e• \u003cstrong data-start=\"915\" data-end=\"943\"\u003eOptimized Power Transfer\u003c\/strong\u003e – Maintains efficient delivery of engine power to the water.\u003c\/p\u003e\n\u003chr data-start=\"1008\" data-end=\"1011\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1013\" data-end=\"1043\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1044\" data-end=\"1263\"\u003eCompatible with Yamaha outboard engines designed for lower unit assemblies in this configuration. Commonly used across a range of small to mid-horsepower Yamaha motors on fishing boats, skiffs, and recreational vessels.\u003c\/p\u003e\n\u003chr data-start=\"1265\" data-end=\"1268\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1270\" data-end=\"1276\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1278\" data-end=\"1429\"\u003e\u003cstrong data-start=\"1278\" data-end=\"1331\"\u003eQ: What are signs the lower unit needs replacing?\u003c\/strong\u003e\u003cbr data-start=\"1331\" data-end=\"1334\"\u003eA: Grinding noises, slipping out of gear, vibration, or water in the gear oil are common signs.\u003c\/p\u003e\n\u003cp data-start=\"1431\" data-end=\"1597\"\u003e\u003cstrong data-start=\"1431\" data-end=\"1498\"\u003eQ: Can I repair my existing lower unit instead of replacing it?\u003c\/strong\u003e\u003cbr data-start=\"1498\" data-end=\"1501\"\u003eA: Sometimes, but if there’s major gear or housing damage, replacement is usually more reliable.\u003c\/p\u003e\n\u003cp data-start=\"1599\" data-end=\"1742\"\u003e\u003cstrong data-start=\"1599\" data-end=\"1638\"\u003eQ: Does this come ready to install?\u003c\/strong\u003e\u003cbr data-start=\"1638\" data-end=\"1641\"\u003eA: Yes, as an assembly, but you’ll still need to ensure proper fitment and setup during installation.\u003c\/p\u003e\n\u003cp data-start=\"1744\" data-end=\"1894\"\u003e\u003cstrong data-start=\"1744\" data-end=\"1807\"\u003eQ: How important is regular maintenance for the lower unit?\u003c\/strong\u003e\u003cbr data-start=\"1807\" data-end=\"1810\"\u003eA: Very important—routine gear oil changes and inspections help extend its lifespan.\u003c\/p\u003e\n\u003cp data-start=\"1896\" data-end=\"2033\"\u003e\u003cstrong data-start=\"1896\" data-end=\"1949\"\u003eQ: Is installation something I can handle myself?\u003c\/strong\u003e\u003cbr data-start=\"1949\" data-end=\"1952\"\u003eA: It’s manageable with experience, but proper alignment and torque are critical.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46938055049507,"sku":"697-45300-12-8D","price":1657.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV237349.jpg?v=1698804226","url":"https:\/\/partsvu.com\/en-au\/products\/yamaha-lower-unit-assembly-697-45300-12-8d","provider":"PartsVu","version":"1.0","type":"link"}