{"product_id":"lower-gearcase-seal-o-ring-18-0584-18-0586-18-0585-25-33145-for-mercury-6-15hp","title":"Lower Gearcase Seal \u0026 O-ring 18-0584 18-0586 18-0585 25-33145 For Mercury 6-15HP","description":"\u003ch2\u003eLower Gearcase Seal \u0026amp; O-ring for Mercury\u003c\/h2\u003e\u003cp\u003eThis lower gearcase seal and O-ring kit is built to replace worn seals on Mercury 6-15HP outboards, citing OEM cross-reference numbers 18-0584, 18-0586, 18-0585, and 25-33145.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThe lower gearcase seal and o-ring set is a direct replacement for Mercury outboards in the 6-15HP range. This lower gearcase seal and o-ring kit ensures a tight seal between the gearcase halves, keeping lubricant in and water out. It is an essential service part for maintaining the lower unit of your Mercury motor.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003ePrecision-molded rubber compound for a snug fit\u003c\/li\u003e\n\u003cli\u003eIncludes both seals and O-rings for complete coverage\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant material for marine environments\u003c\/li\u003e\n\u003cli\u003eMeets OEM specifications for reliable sealing\u003c\/li\u003e\n\u003cli\u003eEasy to install with basic hand tools\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplacing worn seals during lower unit service\u003c\/li\u003e\n\u003cli\u003ePreventing gearcase oil leaks that can lead to lower unit failure\u003c\/li\u003e\n\u003cli\u003eMaintaining watertight integrity when used on Mercury 6-15HP outboards\u003c\/li\u003e\n\u003cli\u003eIdeal for routine maintenance or rebuild projects\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18-0584, 18-0586, 18-0585, 25-33145\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this seal kit fit my Mercury 9.9HP outboard? \u003cstrong\u003eA:\u003c\/strong\u003e The kit is designed for Mercury 6-15HP outboards, but serial number differences can affect fitment, so always confirm compatibility before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is the difference between a seal and an O-ring? \u003cstrong\u003eA:\u003c\/strong\u003e The seal prevents oil from leaking between the gearcase surfaces, while the O-ring provides a flexible seal around the shaft or cover. Both are included in this kit.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":45556617969750,"sku":"ZZ3E01477","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_9f503fac-00a9-4806-ab96-92d5fdcf929e.jpg?v=1789219008","url":"https:\/\/www.solidspare.com\/products\/lower-gearcase-seal-o-ring-18-0584-18-0586-18-0585-25-33145-for-mercury-6-15hp","provider":"Solid Spare","version":"1.0","type":"link"}