{"product_id":"sierra-18-2141-engine-mount-bolt-kit-replaces-mercruiser-10-97934a1-fits-r-mr-alpha-i-gen-ii-bravo-stern-drives","title":"Sierra 18-2141 Engine Mount Bolt Kit for Mercruiser Stern Drive, Replaces 10-97934A1","description":"\u003cp\u003eThe Sierra 18-2141 Engine Mount Bolt Kit is a stainless steel hardware set built to secure the engine mount on Mercruiser stern drive installations. The kit contains the three fasteners needed for a complete mount attachment: a washer, a lock nut, and a motor mount bolt, so you are not stuck trying to source individual hardware pieces separately when a mount bolt is worn, corroded, or missing. Each piece is made from stainless steel with a machined finish and a hex head style, using 1\/2-13 UNC right hand threading that is fully threaded along its length. Sierra manufactures this kit to meet or exceed the original equipment part it replaces, and it interchanges directly with GLM 21080 and Mercury Marine 10-97934A1, making it a straightforward drop-in replacement for stern drive engine mount service. Because engine mount hardware carries significant load and vibration during operation, using correctly graded, corrosion-resistant fasteners like this kit helps maintain a secure engine mount connection rather than reusing stretched or rusted original hardware. This kit is sold as a matched set of three pieces so the washer, lock nut, and bolt are sized correctly to work together.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2141\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Engine Mount Bolt Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize Name:\u003c\/strong\u003e 1\/2-13 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Style:\u003c\/strong\u003e Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Coverage:\u003c\/strong\u003e Fully Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Class:\u003c\/strong\u003e 1A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Type:\u003c\/strong\u003e Hexagon Bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style:\u003c\/strong\u003e Hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade Rating:\u003c\/strong\u003e Grade 10.9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e 18-0681 washer, 18-3728 lock nut, 18-3729 motor mount bolt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.44 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257705\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser stern drive engine mount applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 21080\u003c\/li\u003e\n\u003cli\u003eMercury Marine 10-97934A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-2141 Engine Mount Bolt Kit?\u003c\/strong\u003e The kit contains three pieces: one 18-0681 washer, one 18-3728 lock nut, and one 18-3729 motor mount bolt, giving you the complete fastener set for one engine mount point.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2141 Engine Mount Bolt Kit replace?\u003c\/strong\u003e It interchanges with GLM 21080 and Mercury Marine 10-97934A1, so either of those part numbers can be used to identify the correct replacement kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size threads does the 18-2141 bolt use?\u003c\/strong\u003e The motor mount bolt in this kit uses 1\/2-13 UNC right hand threading that is fully threaded along its length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-2141 kit made from?\u003c\/strong\u003e All three pieces in this kit are made from stainless steel with a machined finish, which resists corrosion in a marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat grade rating does the 18-2141 hardware carry?\u003c\/strong\u003e The bolt and lock nut in the 18-2141 kit are rated Grade 10.9, a hardened fastener grade suited to the load an engine mount bolt carries.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2141 fit Mercruiser stern drives?\u003c\/strong\u003e Yes, this bolt kit is designed for Mercruiser stern drive engine mount applications and interchanges with GLM 21080 and Mercury Marine 10-97934A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2141 Engine Mount Bolt Kit weigh?\u003c\/strong\u003e The complete three-piece kit weighs 0.44 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2141 kit genuine Sierra hardware or a generic substitute?\u003c\/strong\u003e It is manufactured by Sierra, which states this part meets or exceeds the original equipment part it replaces rather than being a generic substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just the bolt or just the lock nut instead of the full kit?\u003c\/strong\u003e The 18-2141 is sold as a matched three-piece kit consisting of the 18-0681 washer, 18-3728 lock nut, and 18-3729 bolt together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat head style does the 18-2141 motor mount bolt have?\u003c\/strong\u003e The bolt uses a hex head style, consistent with standard hex fastener installation using a wrench or socket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988092432603,"sku":"SIE-18-2141","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2141_lg__92730.1558122416.500.750.jpg?v=1785188389","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2141-engine-mount-bolt-kit-replaces-mercruiser-10-97934a1-fits-r-mr-alpha-i-gen-ii-bravo-stern-drives","provider":"Good Vibes Marina","version":"1.0","type":"link"}