{"product_id":"flywheel-key-for-evinrude-outboards-replaces-oem-331107-sierra-18-7174-9","title":"Sierra Valve Cover Seal 18-7174-9, Fits Stern Drive Models R\/MR\/Alpha I, II, 120\/140, 160\/165, 250, 260, 470, Pack of 5","description":"\u003cp\u003eThis Sierra valve cover seal, part number 18-7174-9, is sold in a package of 5 and is designed to seal the valve cover on a range of stern drive powered marine engines. A valve cover seal sits between the valve cover and the cylinder head to keep oil contained within the engine and prevent leaks at this common wear point. Each engine application requires 1 seal, so the pack of 5 gives an installer enough seals to cover multiple engines or to keep spares on hand for future service work.\u003c\/p\u003e\u003cp\u003eSierra cross-references this seal against the corresponding stern drive model and serial number range so the correct seal is matched to the correct application. The 18-7174-9 seal is listed for use on R\/MR\/Alpha I stern drives beginning at serial number 6225577 and up, Stern Drive II units in the serial number range 2398798 to 2671321, 120\/140 stern drives in the serial number range 2062141 to 6225576, 160\/165 stern drives beginning at serial number 2065190 and up, 250 stern drives in the serial number range 4791300 to 4898729, 260 stern drives in the serial number range 4898730 to 6225576, and 470 stern drives in the serial number range 4208730 to 6225576. Always confirm the serial number of the stern drive before ordering to be sure this seal matches the unit being serviced.\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 18-7174-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Valve Cover Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Required Per Engine:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282165529\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eR\/MR\/Alpha I stern drive, beginning serial number 6225577 and up\u003c\/li\u003e\n\u003cli\u003eStern Drive II, serial number range 2398798 to 2671321\u003c\/li\u003e\n\u003cli\u003e120\/140 stern drive, serial number range 2062141 to 6225576\u003c\/li\u003e\n\u003cli\u003e160\/165 stern drive, beginning serial number 2065190 and up\u003c\/li\u003e\n\u003cli\u003e250 stern drive, serial number range 4791300 to 4898729\u003c\/li\u003e\n\u003cli\u003e260 stern drive, serial number range 4898730 to 6225576\u003c\/li\u003e\n\u003cli\u003e470 stern drive, serial number range 4208730 to 6225576\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7174-9 valve cover seal fit?\u003c\/strong\u003e The 18-7174-9 seal fits R\/MR\/Alpha I stern drives beginning at serial number 6225577 and up, Stern Drive II units in the serial number range 2398798 to 2671321, 120\/140 stern drives in the serial number range 2062141 to 6225576, 160\/165 stern drives beginning at serial number 2065190 and up, 250 stern drives in the serial number range 4791300 to 4898729, 260 stern drives in the serial number range 4898730 to 6225576, and 470 stern drives in the serial number range 4208730 to 6225576.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in a package of 18-7174-9?\u003c\/strong\u003e Sierra packages the 18-7174-9 valve cover seal in a set of 5, since only 1 seal is required per engine application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many valve cover seals does one engine need?\u003c\/strong\u003e Each stern drive engine application requires 1 unit of the 18-7174-9 valve cover seal, according to the fitment chart for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the weight of the 18-7174-9 seal package?\u003c\/strong\u003e The Sierra 18-7174-9 valve cover seal package weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my stern drive matches the 18-7174-9 seal?\u003c\/strong\u003e Check the serial number on your stern drive against the ranges listed for 18-7174-9: for example, R\/MR\/Alpha I units need a serial number of 6225577 or higher, while a 250 stern drive needs a serial number between 4791300 and 4898729.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7174-9 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-7174-9 is a Sierra brand valve cover seal, packaged 5 to a set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7174-9 seal fit a Stern Drive II unit?\u003c\/strong\u003e Yes, the 18-7174-9 valve cover seal fits Stern Drive II units within the serial number range 2398798 to 2671321.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7174-9 seal fit a 470 stern drive?\u003c\/strong\u003e Yes, the 18-7174-9 valve cover seal fits 470 stern drives within the serial number range 4208730 to 6225576.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-7174-9 part number?\u003c\/strong\u003e The 18-7174-9 listing includes a package of 5 Sierra valve cover seals, with 1 seal needed per engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a valve cover seal used for?\u003c\/strong\u003e A valve cover seal, such as the Sierra 18-7174-9, seals the joint between the valve cover and the cylinder head to keep engine oil from leaking out at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7174-9 seal fit a 160\/165 stern drive?\u003c\/strong\u003e Yes, it fits 160\/165 stern drives beginning at serial number 2065190 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7174-9 seal fit a 260 stern drive?\u003c\/strong\u003e Yes, the 18-7174-9 valve cover seal fits 260 stern drives in the serial number range 4898730 to 6225576.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988367061211,"sku":"SIE-18-7174-9","price":8.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-7174-9__91824.1737896643.500.750.jpg?v=1785329189","url":"https:\/\/www.goodvibesmarina.com\/products\/flywheel-key-for-evinrude-outboards-replaces-oem-331107-sierra-18-7174-9","provider":"Good Vibes Marina","version":"1.0","type":"link"}