{"product_id":"sierra-18-2170-shift-arm-screw-for-mercruiser-stern-drives-replaces-mercury-10-45590-10-8m0084649","title":"Sierra 18-2170 Shift Arm Screw, Replaces Mercury Marine 10-45590, Mercruiser Stern Drives","description":"\u003cp\u003eThe Sierra 18-2170 Shift Arm Screw is a stainless steel fastener used on Mercruiser stern drive shift arm assemblies. It is sold individually (one screw per package) and is manufactured to meet or exceed the original equipment part it replaces. The screw uses a 1\/4\"-20 UNC thread with a Grade 2 rating and a round head style, giving it the strength and corrosion resistance needed for the marine shift linkage environment. Its stainless steel construction and stainless exterior finish resist saltwater and freshwater corrosion, helping the shift arm connection hold up over repeated use.\u003c\/p\u003e\u003cp\u003eThis part is a direct interchange for the OEM Mercury Marine shift arm screw used on Mercruiser stern drive units, and is commonly used when servicing or rebuilding shift arm linkage where the original fastener has been lost, damaged, or corroded. Because it is a small precision fastener, it is best ordered along with any other shift linkage hardware being serviced at the same time so the assembly goes back together with matched, correctly rated components.\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 18-2170\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\/4\"-20 UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Unified National Coarse (UNC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Class:\u003c\/strong\u003e 3A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Grade:\u003c\/strong\u003e Grade 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Silver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener Type:\u003c\/strong\u003e Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 screw\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercruiser stern drives.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 21750\u003c\/li\u003e\n\u003cli\u003eMercury Marine 10-45590\u003c\/li\u003e\n\u003cli\u003e10-8M0084649\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2170 Shift Arm Screw used for?\u003c\/strong\u003e It is a shift arm screw used on Mercruiser stern drive shift linkage, and it comes as a single screw per package rather than a kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2170 fit all Mercruiser stern drives?\u003c\/strong\u003e The Sierra 18-2170 is designated for use on Mercruiser stern drives; a specific engine or drive model is not listed, so confirm the shift arm screw thread and head match your existing hardware before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-2170 replace?\u003c\/strong\u003e The Sierra 18-2170 interchanges with GLM 21750 and Mercury Marine 10-45590 and 10-8M0084649, so any of those OEM numbers can be used to cross-reference this screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2170 the same as the Mercury Marine 10-45590 screw?\u003c\/strong\u003e Yes, the Sierra 18-2170 is a direct interchange for Mercury Marine part 10-45590 and is built to meet or exceed the original equipment specification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-2170 shift arm screw made from?\u003c\/strong\u003e It is made from stainless steel with a stainless steel exterior finish, giving it corrosion resistance in a marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the Sierra 18-2170 use?\u003c\/strong\u003e The thread size is 1\/4\"-20 UNC (Unified National Coarse) with a 3A thread class and a Grade 2 rating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many screws come in a package of the Sierra 18-2170?\u003c\/strong\u003e Each package contains one Sierra 18-2170 shift arm screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2170 shift arm screw?\u003c\/strong\u003e The screw measures 0.39 x 0.39 x 0.39 inches and weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat head style does the Sierra 18-2170 have?\u003c\/strong\u003e It has a round head style, consistent with the original Mercury Marine shift arm screw it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2170 genuine Sierra or aftermarket?\u003c\/strong\u003e The 18-2170 is manufactured by Sierra as a replacement part built to meet or exceed the original equipment shift arm screw it replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988105310427,"sku":"SIE-18-2170","price":2.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2170_lg__53109.1558121211.500.750.jpg?v=1785188283","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-2170-shift-arm-screw-for-mercruiser-stern-drives-replaces-mercury-10-45590-10-8m0084649","provider":"Good Vibes Marina","version":"1.0","type":"link"}