{"product_id":"mercury-se221-outboard-lower-unit-3-0l-v6-verado-4-8-inch-se90-221","title":"Mercury SE221 Outboard Lower Unit | 3.0L V6 \u0026 Verado 4.8-Inch |SE90-221","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSEI SE221 Mercury lower unit\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a new aftermarket replacement gearcase for selected Mercury outboards using the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4.8-inch torpedo-style housing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e15-spline propeller shaft\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Unlike a single-application gearcase, the SE221 family supports three distinct engine architectures, so the correct configuration must be selected using the engine serial number, engine family, original gear ratio and driveshaft length.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3.0L V6 two-stroke Mercury outboards\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the SE221 uses a 13-spline driveshaft and a 1.75:1 gear ratio. These applications are associated with Mercury’s transition from the earlier SE216-style gearcase around serial number 1B504989.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e2.6L inline-six Verado four-strokes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the SE221 uses a 20-spline driveshaft and is available with 1.75:1 or 1.85:1 ratios in 20-, 25- and 30-inch configurations. For selected \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1.7L inline-four supercharged Verado four-strokes\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, 2.08:1 configurations are available with 20- and 25-inch driveshafts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThis is a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003estandard-rotation replacement lower unit\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. It does not replace the SE228 counter-rotation family, a 5.44-inch Verado gearcase, Torque Master, Torque Master 2 or Sport Master applications. Later Mercury V6 and V8 engines carrying the Verado name also use different gearcases.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBecause several incompatible Mercury lower units look similar externally, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003edo not order by horsepower or appearance alone\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. Submit the complete engine serial number and verify all application details before installation.\u003c\/span\u003e\u003c\/p\u003e","brand":"SEI Marine","offers":[{"title":"3.0L V6 2-Stroke | 1.75:1 | 20-inch L | 90-221-A20","offer_id":47239478640802,"sku":"90-221-A20","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"3.0L V6 2-Stroke | 1.75:1 | 25-inch XL | 90-221-A25","offer_id":47239478673570,"sku":"90-221-A25","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"3.0L V6 2-Stroke | 1.75:1 | 30-inch XXL | 90-221-A30","offer_id":47239478706338,"sku":"90-221-A30","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.75:1 | 20-inch L | 90-221-A20F","offer_id":47239478739106,"sku":"90-221-A20F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.75:1 | 25-inch XL | 90-221-A25F","offer_id":47239478771874,"sku":"90-221-A25F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.75:1 | 30-inch XXL | 90-221-A30F","offer_id":47239478804642,"sku":"90-221-A30F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.85:1 | 20-inch L | 90-221-B20F","offer_id":47239478837410,"sku":"90-221-B20F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.85:1 | 25-inch XL | 90-221-B25F","offer_id":47239478870178,"sku":"90-221-B25F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"2.6L I6 Verado | 1.85:1 | 30-inch XXL | 90-221-B30F","offer_id":47239478902946,"sku":"90-221-B30F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"1.7L I4 Verado | 2.08:1 | 20-inch L | 90-221-C20F","offer_id":47239478935714,"sku":"90-221-C20F","price":1645.0,"currency_code":"USD","in_stock":true},{"title":"1.7L I4 Verado | 2.08:1 | 25-inch XL | 90-221-C25F","offer_id":47239478968482,"sku":"90-221-C25F","price":1645.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/afd35171-SEI-SE-221-2973-scaled-1.jpg?v=1765344001","url":"https:\/\/marinerswarehouse.com\/products\/mercury-se221-outboard-lower-unit-3-0l-v6-verado-4-8-inch-se90-221","provider":"Mariners Warehouse Shop","version":"1.0","type":"link"}