{"product_id":"mercury-3-0l-lower-unit-se216","title":"Mercury Outboard Lower Unit Replacement – Fits 3.0L – 1.62 \u0026 1.75 Ratio – Counter Rotation – SE216","description":"\u003ch2 data-section-id=\"2131if\" data-start=\"676\" data-end=\"704\"\u003eHook (Problem → Solution)\u003c\/h2\u003e\n\u003cp data-start=\"705\" data-end=\"1021\"\u003eIf your Mercury 3.0L outboard lower unit is worn, noisy, or failing under load, replacing it quickly is critical to avoid downtime on the water. The \u003cstrong data-start=\"854\" data-end=\"886\"\u003eSE216 lower unit replacement\u003c\/strong\u003e is built as a dependable aftermarket solution designed to restore smooth operation, proper gear engagement, and long-term reliability.\u003c\/p\u003e\n\u003chr data-start=\"1023\" data-end=\"1026\"\u003e\n\u003ch2 data-section-id=\"1p927wt\" data-start=\"1028\" data-end=\"1047\"\u003eProduct Overview\u003c\/h2\u003e\n\u003cp data-start=\"1048\" data-end=\"1345\"\u003eThe \u003cstrong data-start=\"1052\" data-end=\"1072\"\u003eSE216 lower unit\u003c\/strong\u003e is engineered to replace many Mercury 3.0L outboard lower units (serial number 1B504989 and below). Built with marine-grade internal components and precision gearing, this assembly is designed for boaters who want a reliable replacement without the high cost of OEM units.\u003c\/p\u003e\n\u003cp data-start=\"1347\" data-end=\"1552\"\u003eAvailable in \u003cstrong data-start=\"1360\" data-end=\"1393\"\u003e1.62:1 and 1.75:1 gear ratios\u003c\/strong\u003e and multiple shaft lengths, this lower unit supports different rigging setups commonly found on offshore and twin-engine boats requiring \u003cstrong data-start=\"1531\" data-end=\"1551\"\u003ecounter rotation\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr data-start=\"1554\" data-end=\"1557\"\u003e\n\u003ch2 data-section-id=\"12hq10n\" data-start=\"1559\" data-end=\"1574\"\u003eWho It's For\u003c\/h2\u003e\n\u003cp data-start=\"1575\" data-end=\"1604\"\u003eThis lower unit is ideal for:\u003c\/p\u003e\n\u003cul data-start=\"1606\" data-end=\"1902\"\u003e\n\u003cli data-section-id=\"1q54asm\" data-start=\"1606\" data-end=\"1665\"\u003e\n\u003cp data-start=\"1608\" data-end=\"1665\"\u003eBoat owners replacing a damaged Mercury 3.0L lower unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9thsps\" data-start=\"1666\" data-end=\"1729\"\u003e\n\u003cp data-start=\"1668\" data-end=\"1729\"\u003eOffshore or twin-engine setups needing \u003cstrong data-start=\"1707\" data-end=\"1727\"\u003ecounter rotation\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ta3bgm\" data-start=\"1730\" data-end=\"1781\"\u003e\n\u003cp data-start=\"1732\" data-end=\"1781\"\u003eMarine repair shops servicing Mercury outboards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1637m1l\" data-start=\"1782\" data-end=\"1843\"\u003e\n\u003cp data-start=\"1784\" data-end=\"1843\"\u003ePerformance boaters requiring correct gear ratio matching\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"111t65c\" data-start=\"1844\" data-end=\"1902\"\u003e\n\u003cp data-start=\"1846\" data-end=\"1902\"\u003eAnyone upgrading from older two-piece driveshaft systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1904\" data-end=\"1907\"\u003e\n\u003ch2 data-section-id=\"1d8vjfg\" data-start=\"1909\" data-end=\"1954\"\u003eWhy This Lower Unit Is a Smart Replacement\u003c\/h2\u003e\n\u003cul data-start=\"1956\" data-end=\"2207\"\u003e\n\u003cli data-section-id=\"gv4sjw\" data-start=\"1956\" data-end=\"2014\"\u003e\n\u003cp data-start=\"1958\" data-end=\"2014\"\u003eBuilt for \u003cstrong data-start=\"1968\" data-end=\"2014\"\u003edurability in saltwater and heavy-load use\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1u9c8bh\" data-start=\"2015\" data-end=\"2058\"\u003e\n\u003cp data-start=\"2017\" data-end=\"2058\"\u003ePrecision-cut gears for smoother shifting\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9me52g\" data-start=\"2059\" data-end=\"2105\"\u003e\n\u003cp data-start=\"2061\" data-end=\"2105\"\u003eCost-effective alternative to OEM assemblies\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ok8v2x\" data-start=\"2106\" data-end=\"2156\"\u003e\n\u003cp data-start=\"2108\" data-end=\"2156\"\u003eMultiple shaft options to match different setups\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"ccdth8\" data-start=\"2157\" data-end=\"2207\"\u003e\n\u003cp data-start=\"2159\" data-end=\"2207\"\u003eEngineered specifically for Mercury 3.0L fitment\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2209\" data-end=\"2212\"\u003e\n\u003ch1 data-section-id=\"u0ybrq\" data-start=\"2214\" data-end=\"2228\"\u003eKey Features\u003c\/h1\u003e\n\u003cul data-start=\"2230\" data-end=\"2570\"\u003e\n\u003cli data-section-id=\"is99rn\" data-start=\"2230\" data-end=\"2290\"\u003e\n\u003cp data-start=\"2232\" data-end=\"2290\"\u003eDesigned to replace many Mercury 3.0L outboard lower units\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9i0o0n\" data-start=\"2291\" data-end=\"2337\"\u003e\n\u003cp data-start=\"2293\" data-end=\"2337\"\u003eSupports \u003cstrong data-start=\"2302\" data-end=\"2337\"\u003ecounter rotation configurations\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"152rdy0\" data-start=\"2338\" data-end=\"2386\"\u003e\n\u003cp data-start=\"2340\" data-end=\"2386\"\u003eAvailable in \u003cstrong data-start=\"2353\" data-end=\"2386\"\u003e1.62:1 and 1.75:1 gear ratios\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"lqj0fd\" data-start=\"2387\" data-end=\"2437\"\u003e\n\u003cp data-start=\"2389\" data-end=\"2437\"\u003eMultiple shaft length options: 20\", 25\", and 30\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"aqupf3\" data-start=\"2438\" data-end=\"2477\"\u003e\n\u003cp data-start=\"2440\" data-end=\"2477\"\u003e13-spline one-piece driveshaft design\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"nkxud5\" data-start=\"2478\" data-end=\"2523\"\u003e\n\u003cp data-start=\"2480\" data-end=\"2523\"\u003eStub shaft option for 8-spline applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1mmhgql\" data-start=\"2524\" data-end=\"2570\"\u003e\n\u003cp data-start=\"2526\" data-end=\"2570\"\u003eMarine-grade housing and internal components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2572\" data-end=\"2575\"\u003e\n\u003ch1 data-section-id=\"zjxypn\" data-start=\"2577\" data-end=\"2603\"\u003eTechnical Specifications\u003c\/h1\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable data-start=\"2605\" data-end=\"2985\" class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead data-start=\"2605\" data-end=\"2632\"\u003e\n\u003ctr data-start=\"2605\" data-end=\"2632\"\u003e\n\u003cth data-start=\"2605\" data-end=\"2621\" data-col-size=\"sm\" class=\"\"\u003eSpecification\u003c\/th\u003e\n\u003cth data-start=\"2621\" data-end=\"2632\" data-col-size=\"sm\" class=\"\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-start=\"2661\" data-end=\"2985\"\u003e\n\u003ctr data-start=\"2661\" data-end=\"2686\"\u003e\n\u003ctd data-start=\"2661\" data-end=\"2677\" data-col-size=\"sm\"\u003eProduct Model\u003c\/td\u003e\n\u003ctd data-start=\"2677\" data-end=\"2686\" data-col-size=\"sm\"\u003eSE216\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2687\" data-end=\"2709\"\u003e\n\u003ctd data-start=\"2687\" data-end=\"2695\" data-col-size=\"sm\"\u003eBrand\u003c\/td\u003e\n\u003ctd data-start=\"2695\" data-end=\"2709\" data-col-size=\"sm\"\u003eSEI Marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2710\" data-end=\"2759\"\u003e\n\u003ctd data-start=\"2710\" data-end=\"2733\" data-col-size=\"sm\"\u003eEngine Compatibility\u003c\/td\u003e\n\u003ctd data-start=\"2733\" data-end=\"2759\" data-col-size=\"sm\"\u003eMercury 3.0L Outboards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2760\" data-end=\"2796\"\u003e\n\u003ctd data-start=\"2760\" data-end=\"2776\" data-col-size=\"sm\"\u003eRotation Type\u003c\/td\u003e\n\u003ctd data-start=\"2776\" data-end=\"2796\" data-col-size=\"sm\"\u003eCounter Rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2797\" data-end=\"2829\"\u003e\n\u003ctd data-start=\"2797\" data-end=\"2811\" data-col-size=\"sm\"\u003eGear Ratios\u003c\/td\u003e\n\u003ctd data-start=\"2811\" data-end=\"2829\" data-col-size=\"sm\"\u003e1.62:1, 1.75:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2830\" data-end=\"2875\"\u003e\n\u003ctd data-start=\"2830\" data-end=\"2846\" data-col-size=\"sm\"\u003eShaft Options\u003c\/td\u003e\n\u003ctd data-start=\"2846\" data-end=\"2875\" data-col-size=\"sm\"\u003e20\", 25\", 30\", Stub Shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2876\" data-end=\"2903\"\u003e\n\u003ctd data-start=\"2876\" data-end=\"2890\" data-col-size=\"sm\"\u003eSpline Type\u003c\/td\u003e\n\u003ctd data-start=\"2890\" data-end=\"2903\" data-col-size=\"sm\"\u003e13 Spline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2904\" data-end=\"2944\"\u003e\n\u003ctd data-start=\"2904\" data-end=\"2918\" data-col-size=\"sm\"\u003eApplication\u003c\/td\u003e\n\u003ctd data-start=\"2918\" data-end=\"2944\" data-col-size=\"sm\"\u003eReplacement Lower Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-start=\"2945\" data-end=\"2985\"\u003e\n\u003ctd data-start=\"2945\" data-end=\"2957\" data-col-size=\"sm\"\u003eCondition\u003c\/td\u003e\n\u003ctd data-start=\"2957\" data-end=\"2985\" data-col-size=\"sm\"\u003eNew Aftermarket Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr data-start=\"2987\" data-end=\"2990\"\u003e\n\u003ch1 data-section-id=\"1h57ei3\" data-start=\"2992\" data-end=\"3013\"\u003eCompatibility Notes\u003c\/h1\u003e\n\u003cul data-start=\"3015\" data-end=\"3467\"\u003e\n\u003cli data-section-id=\"139q0hw\" data-start=\"3015\" data-end=\"3079\"\u003e\n\u003cp data-start=\"3017\" data-end=\"3079\"\u003eFits many \u003cstrong data-start=\"3027\" data-end=\"3077\"\u003eMercury 3.0L outboards (SN 1B504989 and below)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1g0fdbp\" data-start=\"3080\" data-end=\"3150\"\u003e\n\u003cp data-start=\"3082\" data-end=\"3150\"\u003eDoes \u003cstrong data-start=\"3087\" data-end=\"3150\"\u003enot replace Torque Master, Torque Master 2, or Sport Master\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"qkrazx\" data-start=\"3151\" data-end=\"3230\"\u003e\n\u003cp data-start=\"3153\" data-end=\"3230\"\u003eFor engines using \u003cstrong data-start=\"3171\" data-end=\"3195\"\u003e8-spline driveshafts\u003c\/strong\u003e, choose the \u003cstrong data-start=\"3208\" data-end=\"3230\"\u003estub shaft version\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"lb9f55\" data-start=\"3231\" data-end=\"3363\"\u003e\n\u003cp data-start=\"3233\" data-end=\"3363\"\u003eIf your unit serial number is \u003cstrong data-start=\"3263\" data-end=\"3281\"\u003ebelow OG438000\u003c\/strong\u003e, reuse your existing water tube coupling or purchase the correct replacement part\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1nxjq4c\" data-start=\"3364\" data-end=\"3467\"\u003e\n\u003cp data-start=\"3366\" data-end=\"3467\"\u003eUsers upgrading from \u003cstrong data-start=\"3387\" data-end=\"3417\"\u003e13-spline two-piece shafts\u003c\/strong\u003e should install the correct one-piece shaft option\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"3469\" data-end=\"3472\"\u003e\n\u003ch1 data-section-id=\"1c353oi\" data-start=\"3474\" data-end=\"3495\"\u003eVariant Explanation\u003c\/h1\u003e\n\u003cp data-start=\"3497\" data-end=\"3599\"\u003e\u003cstrong data-start=\"3497\" data-end=\"3529\"\u003e13 \/ 1.75 \/ 3.0L \/ 20\" Shaft\u003c\/strong\u003e\u003cbr data-start=\"3529\" data-end=\"3532\"\u003eBest for standard 20-inch transom setups using the 1.75 gear ratio.\u003c\/p\u003e\n\u003cp data-start=\"3601\" data-end=\"3699\"\u003e\u003cstrong data-start=\"3601\" data-end=\"3633\"\u003e13 \/ 1.75 \/ 3.0L \/ 25\" Shaft\u003c\/strong\u003e\u003cbr data-start=\"3633\" data-end=\"3636\"\u003eDesigned for boats requiring a longer driveshaft configuration.\u003c\/p\u003e\n\u003cp data-start=\"3701\" data-end=\"3793\"\u003e\u003cstrong data-start=\"3701\" data-end=\"3733\"\u003e13 \/ 1.75 \/ 3.0L \/ 30\" Shaft\u003c\/strong\u003e\u003cbr data-start=\"3733\" data-end=\"3736\"\u003eUsed on larger offshore boats with extended shaft setups.\u003c\/p\u003e\n\u003cp data-start=\"3795\" data-end=\"3885\"\u003e\u003cstrong data-start=\"3795\" data-end=\"3828\"\u003e13 \/ 1.75 \/ 3.0L \/ Stub Shaft\u003c\/strong\u003e\u003cbr data-start=\"3828\" data-end=\"3831\"\u003eFor engines running an \u003cstrong data-start=\"3854\" data-end=\"3884\"\u003e8-spline driveshaft system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"3887\" data-end=\"3986\"\u003e\u003cstrong data-start=\"3887\" data-end=\"3919\"\u003e13 \/ 1.62 \/ 3.0L \/ 20\" Shaft\u003c\/strong\u003e\u003cbr data-start=\"3919\" data-end=\"3922\"\u003eOptimized for applications requiring the 1.62 performance ratio.\u003c\/p\u003e\n\u003cp data-start=\"3988\" data-end=\"4090\"\u003e\u003cstrong data-start=\"3988\" data-end=\"4020\"\u003e13 \/ 1.62 \/ 3.0L \/ 25\" Shaft\u003c\/strong\u003e\u003cbr data-start=\"4020\" data-end=\"4023\"\u003eBalances performance and compatibility for mid-length shaft setups.\u003c\/p\u003e\n\u003cp data-start=\"4092\" data-end=\"4168\"\u003e\u003cstrong data-start=\"4092\" data-end=\"4125\"\u003e13 \/ 1.62 \/ 3.0L \/ Stub Shaft\u003c\/strong\u003e\u003cbr data-start=\"4125\" data-end=\"4128\"\u003eRequired for specific conversion setups.\u003c\/p\u003e\n\u003chr data-start=\"4170\" data-end=\"4173\"\u003e\n\u003ch1 data-section-id=\"1jxbixs\" data-start=\"4175\" data-end=\"4192\"\u003eWhat's Included\u003c\/h1\u003e\n\u003cul data-start=\"4194\" data-end=\"4320\"\u003e\n\u003cli data-section-id=\"l6nrix\" data-start=\"4194\" data-end=\"4230\"\u003e\n\u003cp data-start=\"4196\" data-end=\"4230\"\u003eComplete SE216 Lower Unit Assembly\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1xly135\" data-start=\"4231\" data-end=\"4255\"\u003e\n\u003cp data-start=\"4233\" data-end=\"4255\"\u003ePre-assembled gearcase\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1d89wtf\" data-start=\"4256\" data-end=\"4296\"\u003e\n\u003cp data-start=\"4258\" data-end=\"4296\"\u003eDriveshaft (based on selected variant)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"dedy0v\" data-start=\"4297\" data-end=\"4320\"\u003e\n\u003cp data-start=\"4299\" data-end=\"4320\"\u003eReady-to-install unit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"4322\" data-end=\"4325\"\u003e\n\u003ch1 data-section-id=\"11yenlb\" data-start=\"4327\" data-end=\"4357\"\u003eImportant Notes \/ Disclaimer\u003c\/h1\u003e\n\u003cp data-start=\"4359\" data-end=\"4374\"\u003eAlways confirm:\u003c\/p\u003e\n\u003cul data-start=\"4376\" data-end=\"4442\"\u003e\n\u003cli data-section-id=\"puycsl\" data-start=\"4376\" data-end=\"4398\"\u003e\n\u003cp data-start=\"4378\" data-end=\"4398\"\u003eEngine serial number\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"172d49o\" data-start=\"4399\" data-end=\"4413\"\u003e\n\u003cp data-start=\"4401\" data-end=\"4413\"\u003eShaft length\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9ws3bs\" data-start=\"4414\" data-end=\"4426\"\u003e\n\u003cp data-start=\"4416\" data-end=\"4426\"\u003eGear ratio\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"al5ax0\" data-start=\"4427\" data-end=\"4442\"\u003e\n\u003cp data-start=\"4429\" data-end=\"4442\"\u003eRotation type\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4444\" data-end=\"4485\"\u003ebefore ordering to ensure proper fitment.\u003c\/p\u003e\n\u003cp data-start=\"4487\" data-end=\"4563\"\u003eProfessional installation is recommended for best performance and longevity.\u003c\/p\u003e\n\u003chr data-start=\"4565\" data-end=\"4568\"\u003e\n\u003ch1 data-section-id=\"tljigr\" data-start=\"4570\" data-end=\"4595\"\u003eBrowse More Lower Units\u003c\/h1\u003e\n\u003cp data-start=\"4596\" data-end=\"4742\"\u003eLooking for other Mercury lower units or gear ratios?\u003cbr data-start=\"4649\" data-end=\"4652\"\u003eBrowse our full collection of Mercury replacement lower units and marine drivetrain parts.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"13\/1.75\/3.0L\/20\" Shaft","offer_id":47854663893251,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.75\/3.0L\/25\" Shaft","offer_id":47854663926019,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.75\/3.0L\/30\" Shaft","offer_id":47854663958787,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.75\/3.0L\/Stub Shaft","offer_id":47854663991555,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.62\/3.0L\/20\" Shaft","offer_id":47854664024323,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.62\/3.0L\/25\" Shaft","offer_id":47854664057091,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"13\/1.62\/3.0L\/Stub Shaft","offer_id":47854664089859,"sku":"ST-90-216","price":1195.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/2613\/8883\/files\/216.jpg?v=1773890077","url":"https:\/\/allmarinesuppliers.com\/products\/mercury-3-0l-lower-unit-se216","provider":"All Marine Suppliers","version":"1.0","type":"link"}