{"product_id":"sierra-18-0659-o-ring-for-pressure-control-valve-yamaha-outboard-gearcase-drive","title":"Sierra O-Ring for Pressure Control Valve, Part Number 18-0659","description":"\u003cp\u003eThis is a genuine Sierra O-ring engineered specifically for the pressure control valve on marine engine applications. It is designed as a direct seal replacement, restoring proper sealing at the pressure control valve where an original O-ring has hardened, cracked, or lost its seal over time. As a small, single-component seal, its role is simple but critical: prevent pressure loss and leakage at the valve interface, helping the pressure control valve function as intended. Each unit is sold as a single O-ring identified by Sierra part number 18-0659.\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 18-0659\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e O-Ring, Pressure Control Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282388775\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 O-ring per pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part 18-0659 used for?\u003c\/strong\u003e Sierra 18-0659 is an O-ring designed to seal the pressure control valve on a marine engine, replacing a worn or damaged original seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many O-rings come in one order of 18-0659?\u003c\/strong\u003e Each order of Sierra 18-0659 includes one O-ring, sold as a single unit for one pressure control valve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0659 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-0659 is a genuine Sierra O-ring, not a generic or universal seal, made specifically for the pressure control valve application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0659 O-ring weigh?\u003c\/strong\u003e The Sierra 18-0659 O-ring weighs 0.01 pounds, reflecting its small size as a single seal component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for Sierra 18-0659?\u003c\/strong\u003e The UPC for the Sierra 18-0659 pressure control valve O-ring is 808282388775.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the pressure control valve O-ring?\u003c\/strong\u003e Replace the O-ring on the pressure control valve, such as Sierra 18-0659, if you notice a loss of pressure, fluid seepage around the valve, or a visibly cracked or flattened seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-0659 include the pressure control valve itself?\u003c\/strong\u003e No, this part covers only the O-ring seal for the pressure control valve, not the valve body or assembly itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan 18-0659 be used as a general-purpose O-ring?\u003c\/strong\u003e Sierra 18-0659 is manufactured specifically for the pressure control valve application rather than as a generic all-purpose seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-0659 O-ring simple?\u003c\/strong\u003e Installing the Sierra 18-0659 O-ring is a straightforward seal replacement at the pressure control valve, requiring removal of the old O-ring and seating the new one in its place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy choose the Sierra 18-0659 over a generic O-ring?\u003c\/strong\u003e The Sierra 18-0659 is sized and specified for the pressure control valve, so it fits and seals correctly where a generic O-ring may not match the required dimensions.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988083912923,"sku":"SIE-18-0659","price":4.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-0659__89853.1739477160.500.750.jpg?v=1785188985","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0659-o-ring-for-pressure-control-valve-yamaha-outboard-gearcase-drive","provider":"Good Vibes Marina","version":"1.0","type":"link"}