{"product_id":"sierra-18-3742-9-marine-cotter-pin-oem-314502-for-evinrude-johnson-omc-prop-nuts-1-8-x-1-1-4in-pack-of-10","title":"Sierra 18-3742-9 Cotter Pin, OEM 314502 Replacement, Pack of 10","description":"\u003cp\u003eThe Sierra 18-3742-9 Cotter Pin is a marine-grade fastener used to secure propeller nuts and other threaded hardware on outboard and stern drive lower units. Sold in a pack of 10, this pin is built to meet or exceed original equipment quality, making it a reliable choice for routine prop maintenance and hardware replacement. Each pin measures 1\/8 x 1-1\/4 inches and is constructed from alloy steel for corrosion resistance and durability in a marine environment.\u003c\/p\u003e\u003cp\u003eThis cotter pin is commonly paired with a prop nut and prop spacer during propeller installation, locking the nut in place to prevent it from backing off under vibration and load. It cross-references directly to OMC and Evinrude\/Johnson part number 314502, so it is a straightforward replacement when servicing older Evinrude and OMC lower units. Keeping a pack on hand is useful for any boat owner who regularly removes and reinstalls a propeller, since cotter pins are a single-use fastener that should be replaced each time.\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 18-3742-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1\/8 x 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePin Type:\u003c\/strong\u003e Cotter Pin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eUniversal fit for propeller nuts and hardware calling for a 1\/8 x 1-1\/4 inch cotter pin, including Evinrude\/Johnson and OMC applications using OEM part number 314502.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e314502\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the Sierra 18-3742-9 cotter pin?\u003c\/strong\u003e The Sierra 18-3742-9 cotter pin measures 1\/8 x 1-1\/4 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pins come in a pack?\u003c\/strong\u003e The 18-3742-9 is sold in a pack of 10 cotter pins.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is this cotter pin made from?\u003c\/strong\u003e It is made from alloy steel, which resists corrosion in marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-3742-9 replace?\u003c\/strong\u003e It replaces OEM part number 314502, used on Evinrude\/Johnson and OMC applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-3742-9 is an aftermarket cotter pin manufactured to meet or exceed original equipment quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this cotter pin used for?\u003c\/strong\u003e It is used to secure a propeller nut and other threaded lower-unit hardware, preventing the nut from backing off under vibration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould cotter pins be reused after removing a propeller?\u003c\/strong\u003e No, a cotter pin such as the 18-3742-9 is a single-use fastener and should be replaced each time the propeller is removed and reinstalled.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in a pack of the 18-3742-9?\u003c\/strong\u003e Each pack contains 10 alloy steel cotter pins, part number 18-3742-9.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3742-9 cotter pin weigh?\u003c\/strong\u003e The pack weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3742-9 fit both Evinrude and OMC lower units?\u003c\/strong\u003e Yes, it cross-references to OEM number 314502, which covers Evinrude\/Johnson and OMC applications.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988162883803,"sku":"SIE-18-3742-9","price":9.81,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-3742-9__25992.1737858257.500.750.jpg?v=1785188449","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3742-9-marine-cotter-pin-oem-314502-for-evinrude-johnson-omc-prop-nuts-1-8-x-1-1-4in-pack-of-10","provider":"Good Vibes Marina","version":"1.0","type":"link"}