{"product_id":"mercury-bigfoot-lower-unit-40-60-hp-4-stroke","title":"Mercury BigFoot Lower Unit | 40–60 HP 4-Stroke","description":"\u003cp\u003eThe \u003cb\u003eOBR Replacement Lower Unit\u003c\/b\u003e is a precision-engineered gearcase designed for selected \u003cb\u003eMercury 40 HP, 50 HP, and 60 HP Inline-4, 4-stroke BigFoot and Command Thrust outboard engines\u003c\/b\u003e. Engineered specifically for heavy-duty marine service, this replacement unit utilizes the larger \u003cb\u003e4.25-inch gearcase housing\u003c\/b\u003e, making it an ideal choice for pontoons, commercial vessels, workboats, and heavy hull applications that demand increased low-end thrust and enhanced maneuverability.\u003c\/p\u003e\n\u003cp\u003eBuilt to meet rigorous performance standards, this gearcase features an optimized \u003cb\u003e2.33:1 gear ratio\u003c\/b\u003e to deliver maximum torque delivery under heavy workloads. It comes equipped with a heavy-duty \u003cb\u003e15-spline propeller shaft\u003c\/b\u003e, ensuring direct compatibility with a wide selection of standard Mercury high-thrust propellers.\u003c\/p\u003e\n\u003cp\u003eAvailable in \u003cb\u003esix distinct configurations\u003c\/b\u003e across both \u003cb\u003eBrand New OBR\u003c\/b\u003e and \u003cb\u003eOBR Remanufactured\u003c\/b\u003e build conditions, this series covers selected \u003cb\u003e2001–2007\u003c\/b\u003e and \u003cb\u003e2008–2026\u003c\/b\u003e model years. Depending on your transom setup and year group, units can be configured in either \u003cb\u003e20-inch (L)\u003c\/b\u003e or \u003cb\u003e25-inch (XL)\u003c\/b\u003e driveshaft lengths. Every unit is manufactured or remanufactured using high-grade internal components and precision-machined housings to ensure smooth power transmission, corrosion resistance, and long-term operating reliability on the water.\u003c\/p\u003e\n\u003cp\u003eAll OBR lower units are backed by a \u003cb\u003e2-Year OBR Limited Warranty\u003c\/b\u003e, providing dependable quality and performance for complete peace of mind.\u003c\/p\u003e","brand":"OBR Parts","offers":[{"title":"New OBR Gearcase \/ New | 2001–2007 | 20-inch L | 2.33:1 | ME-G3-05A-N","offer_id":47239522582690,"sku":"ME-G3-05A-N","price":2822.0,"currency_code":"USD","in_stock":true},{"title":"New OBR Gearcase \/ New | 2008–2026 | 20-inch L | 2.33:1 | ME-G3-05C-N","offer_id":47239522615458,"sku":"ME-G3-05C-N","price":3497.0,"currency_code":"USD","in_stock":true},{"title":"OBR Remanufactured Gearcase \/ Remanufactured | 2001–2007 | 20-inch L | 2.33:1 | ME-G3-05A-R","offer_id":47239522648226,"sku":"ME-G3-05A-R","price":2552.0,"currency_code":"USD","in_stock":true},{"title":"OBR Remanufactured Gearcase \/ Remanufactured | 2008–2026 | 20-inch L | 2.33:1 | ME-G3-05C-R","offer_id":47239522680994,"sku":"ME-G3-05C-R","price":3227.0,"currency_code":"USD","in_stock":true},{"title":"OBR Remanufactured Gearcase \/ Remanufactured | 2001–2007 | 25-inch XL | 2.33:1 | ME-G3-05B-R","offer_id":47239522713762,"sku":"ME-G3-05B-R","price":2552.0,"currency_code":"USD","in_stock":true},{"title":"OBR Remanufactured Gearcase \/ Remanufactured | 2008–2026 | 25-inch XL | 2.33:1 | ME-G3-05D-R","offer_id":47334558400674,"sku":"ME-G3-05D-R","price":2822.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/3170\/5250\/files\/ebb66617-Me-g3-04R.png?v=1765344034","url":"https:\/\/marinerswarehouse.com\/products\/mercury-bigfoot-lower-unit-40-60-hp-4-stroke","provider":"Mariners Warehouse Shop","version":"1.0","type":"link"}