{"product_id":"mercury-bellows-assy-86840a05","title":"Mercury – U-Joint Bellows Assembly | Sterndrive Driveline Protection | 86840A05","description":"\u003cp data-start=\"0\" data-end=\"83\"\u003e\u003cstrong data-start=\"0\" data-end=\"83\"\u003eMercury – U-Joint Bellows Assembly | Sterndrive Driveline Protection | 86840A05\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"85\" data-end=\"88\"\u003e\n\u003ch3 data-start=\"90\" data-end=\"104\"\u003eOverview\u003c\/h3\u003e\n\u003cp data-start=\"105\" data-end=\"581\"\u003eThis U-joint bellows is the flexible sleeve that keeps water out of the driveline area on Bravo, Blackhawk, and Vazer drives. When the old one dries out or starts cracking, it doesn’t take much for water to find its way in, and that can turn into an expensive mess pretty quickly. Swapping in a fresh OEM bellows is one of those jobs that feels small but makes a big difference. The kit comes with the clamps you need, and the install is pretty manageable with everyday tools.\u003c\/p\u003e\n\u003chr data-start=\"583\" data-end=\"586\"\u003e\n\u003ch3 data-start=\"588\" data-end=\"606\"\u003eKey Features\u003c\/h3\u003e\n\u003cp data-start=\"607\" data-end=\"1021\"\u003e • \u003cstrong data-start=\"610\" data-end=\"640\"\u003eRibbed Composite Bellows –\u003c\/strong\u003e Flexible design that seals the bell housing from water intrusion.\u003cbr data-start=\"706\" data-end=\"709\"\u003e • \u003cstrong data-start=\"712\" data-end=\"733\"\u003eClamps Included –\u003c\/strong\u003e Bands for both ends are supplied in the kit.\u003cbr data-start=\"778\" data-end=\"781\"\u003e • \u003cstrong data-start=\"784\" data-end=\"809\"\u003eFresh Sealing Parts –\u003c\/strong\u003e Comes with a new element and O-ring.\u003cbr data-start=\"846\" data-end=\"849\"\u003e • \u003cstrong data-start=\"852\" data-end=\"876\"\u003eBuilt for Movement –\u003c\/strong\u003e Holds up to vibration and engine flex without tearing.\u003cbr data-start=\"931\" data-end=\"934\"\u003e • \u003cstrong data-start=\"937\" data-end=\"968\"\u003eMarine-Friendly Materials –\u003c\/strong\u003e Stands up to moisture, heat, and long-term exposure.\u003c\/p\u003e\n\u003chr data-start=\"1023\" data-end=\"1026\"\u003e\n\u003ch3 data-start=\"1028\" data-end=\"1061\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1062\" data-end=\"1217\"\u003e • MerCruiser Bravo sterndrives (1991+)\u003cbr data-start=\"1101\" data-end=\"1104\"\u003e • MerCruiser Blackhawk sterndrives\u003cbr data-start=\"1139\" data-end=\"1142\"\u003e • MerCruiser Vazer sterndrives\u003cbr data-start=\"1173\" data-end=\"1176\"\u003e • Standard U-joint bell housing setups\u003c\/p\u003e\n\u003chr data-start=\"1219\" data-end=\"1222\"\u003e\n\u003ch3 data-start=\"1224\" data-end=\"1262\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/h3\u003e\n\u003cp data-start=\"1263\" data-end=\"1622\"\u003eA new bellows keeps the driveline dry, which goes a long way toward preventing corrosion inside the housing. If your old bellows were getting stiff, you’ll usually notice smoother movement once everything’s sealed back up. It’s also one less thing to worry about when you’re running in rougher water or trimming the drive up and down. Simple part, big payoff.\u003c\/p\u003e\n\u003chr data-start=\"1624\" data-end=\"1627\"\u003e\n\u003ch3 data-start=\"1629\" data-end=\"1646\"\u003eWhy Buy OEM\u003c\/h3\u003e\n\u003cp data-start=\"1647\" data-end=\"1951\"\u003eMercury molds these bellows to match the exact shape and groove layout on their drives, so they seat properly without stretching or fighting the fit. The material holds up far better than bargain bellows when it comes to heat, flex, and vibration. Using OEM here simply avoids the “do it twice” scenario.\u003c\/p\u003e\n\u003chr data-start=\"1953\" data-end=\"1956\"\u003e\n\u003ch3 data-start=\"1958\" data-end=\"1967\"\u003eFAQ\u003c\/h3\u003e\n\u003cp data-start=\"1968\" data-end=\"2105\"\u003e\u003cstrong data-start=\"1968\" data-end=\"2016\"\u003eQ1: How do I know my bellows need replacing?\u003c\/strong\u003e\u003cbr data-start=\"2016\" data-end=\"2019\"\u003eCracks, stiffness, water in the bell housing, or rusty U-joints are all warning signs.\u003c\/p\u003e\n\u003cp data-start=\"2107\" data-end=\"2220\"\u003e\u003cstrong data-start=\"2107\" data-end=\"2143\"\u003eQ2: Do I need any special tools?\u003c\/strong\u003e\u003cbr data-start=\"2143\" data-end=\"2146\"\u003eNot really—basic hand tools work. A bellows expander just makes it easier.\u003c\/p\u003e\n\u003cp data-start=\"2222\" data-end=\"2331\"\u003e\u003cstrong data-start=\"2222\" data-end=\"2260\"\u003eQ3: Does it handle saltwater okay?\u003c\/strong\u003e\u003cbr data-start=\"2260\" data-end=\"2263\"\u003eYes, just give the area a rinse now and then to help it last longer.\u003c\/p\u003e\n\u003cp data-start=\"2333\" data-end=\"2446\"\u003e\u003cstrong data-start=\"2333\" data-end=\"2358\"\u003eQ4: Any install tips?\u003c\/strong\u003e\u003cbr data-start=\"2358\" data-end=\"2361\"\u003eMake sure the bellows lip is fully seated in its groove before tightening the clamps.\u003c\/p\u003e\n\u003cp data-start=\"2448\" data-end=\"2592\"\u003e\u003cstrong data-start=\"2448\" data-end=\"2496\"\u003eQ5: What happens if I ignore a worn bellows?\u003c\/strong\u003e\u003cbr data-start=\"2496\" data-end=\"2499\"\u003eWater gets in, and the U-joints or gimbal bearings end up paying the price—usually not cheap.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46935721541923,"sku":"86840A05","price":118.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV651353.jpg?v=1720533935","url":"https:\/\/partsvu.com\/en-au\/products\/mercury-bellows-assy-86840a05","provider":"PartsVu","version":"1.0","type":"link"}