{"product_id":"sierra-18-4274-prop-spacer-for-yamaha-outboards-replaces-oem-688-45997-01-00","title":"Sierra 18-4274 Prop Spacer for Yamaha Outboard Motors, Replaces 688-45997-01","description":"\u003cp\u003eThe Sierra 18-4274 Prop Spacer is a machined replacement spacer designed for Yamaha outboard motors, installed on the propeller shaft between the propeller hub and the thrust hub or prop nut hardware. Its role is to maintain correct axial spacing and alignment on the shaft so the propeller seats properly and hardware such as the prop nut and cotter pin can be torqued and secured as intended. Each package includes one prop spacer.\u003c\/p\u003e\u003cp\u003eThis spacer corresponds to Yamaha O.E. Part number 688-45997-01 and is built to meet or exceed the fit and performance of the original equipment part it replaces. The compact, precision-machined design measures 0.39 x 0.39 x 0.39 inches and weighs 0.39 pounds, matching the footprint of the original Yamaha component so it drops into place during routine propeller service or hub replacement.\u003c\/p\u003e\u003cp\u003eSierra is a long-established manufacturer of outboard and sterndrive replacement parts, and this spacer is sold as an individual service part for technicians and boat owners performing propeller maintenance on compatible Yamaha outboard motors.\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 18-4274\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDescription:\u003c\/strong\u003e Prop Spacer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.39 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Included:\u003c\/strong\u003e 1 spacer per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999976536\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e688-45997-01\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-4274 prop spacer fit?\u003c\/strong\u003e The Sierra 18-4274 prop spacer is designed for Yamaha outboard motors, fitting on the propeller shaft as part of the propeller hub hardware stack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-4274 replace?\u003c\/strong\u003e It replaces Yamaha O.E. Part number 688-45997-01, and is built to meet or exceed the original part's fit and function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many spacers come in one package?\u003c\/strong\u003e Each package of the Sierra 18-4274 includes one prop spacer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this prop spacer?\u003c\/strong\u003e The Sierra 18-4274 measures 0.39 x 0.39 x 0.39 inches, a compact size that matches the original Yamaha component it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-4274 prop spacer weigh?\u003c\/strong\u003e This spacer weighs 0.39 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-4274 a genuine Yamaha part or an aftermarket part?\u003c\/strong\u003e The 18-4274 is a Sierra-manufactured aftermarket replacement, made to meet or exceed the performance of the original Yamaha 688-45997-01 spacer it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-4274 spacer have?\u003c\/strong\u003e It has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does the prop spacer install on the outboard?\u003c\/strong\u003e The 18-4274 installs on the propeller shaft of a Yamaha outboard, positioned as part of the hub hardware alongside the propeller nut and related fasteners.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-4274 include the prop nut or cotter pin?\u003c\/strong\u003e No, the 18-4274 package contains only the prop spacer itself; the prop nut and cotter pin are separate Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-4274 prop spacer?\u003c\/strong\u003e The UPC for this Sierra prop spacer is 030999976536.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988178350299,"sku":"SIE-18-4274","price":32.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4274_lg__82726.1558127191.500.750.jpg?v=1785188975","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4274-prop-spacer-for-yamaha-outboards-replaces-oem-688-45997-01-00","provider":"Good Vibes Marina","version":"1.0","type":"link"}