{"product_id":"sierra-18-99546-check-valve-assembly-for-marine-oil-change-pumps","title":"Sierra Check Valve Assembly 18-99546, Cross Reference 551-33cv, for Marine Oil Change Pumps","description":"\u003cp\u003eThe Sierra 18-99546 Check Valve Assembly is a replacement check valve built for marine oil change pumps, the type used to extract used engine oil from a boat's crankcase during routine oil changes. The check valve is the internal component that allows oil to flow in one direction through the pump while preventing backflow, so the pump can draw oil out of the engine efficiently on each stroke or cycle. A worn or cracked check valve is a common cause of a marine oil change pump losing suction or failing to draw oil at all, and replacing the valve assembly restores proper pump function without having to replace the entire pump. This assembly is sold as a single complete unit, so installation is a straightforward swap of the worn valve for a new one. It is cross-referenced to the CDI Electronics 551-33cv, making it a suitable replacement for pumps that originally used that part. Boat owners performing their own annual oil changes, or servicing a pump that has started losing prime, can use this valve assembly to get their existing oil change pump back into working order rather than purchasing a new pump outright.\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 18-99546\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Check Valve Assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Marine Oil Change Pumps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 736983856203\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross Reference:\u003c\/strong\u003e 551-33cv (CDI Electronics)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e551-33cv\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99546 Check Valve Assembly used for?\u003c\/strong\u003e It is a check valve assembly for marine oil change pumps, controlling one-way oil flow so the pump can draw used oil out of an engine's crankcase during an oil change.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99546 compatible with CDI Electronics 551-33cv pumps?\u003c\/strong\u003e Yes, the 18-99546 is cross-referenced to the CDI Electronics 551-33cv, so it can be used as a replacement valve assembly on pumps that call for that part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99546 check valve assembly weigh?\u003c\/strong\u003e The Sierra 18-99546 Check Valve Assembly weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many check valves come in one 18-99546 package?\u003c\/strong\u003e One complete check valve assembly is included per unit, ready to install as a direct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would my marine oil change pump lose suction?\u003c\/strong\u003e A worn or cracked check valve, like the one replaced by the Sierra 18-99546, is a common cause of an oil change pump losing suction or failing to draw oil.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I replace just the check valve instead of the whole oil change pump?\u003c\/strong\u003e Yes, the Sierra 18-99546 Check Valve Assembly lets you replace the failed valve component on its own rather than buying an entirely new oil change pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-99546 an OEM part or aftermarket?\u003c\/strong\u003e The 18-99546 is a Sierra-branded replacement part cross-referenced to the CDI Electronics 551-33cv, sold as an aftermarket equivalent for that valve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-99546 Check Valve Assembly?\u003c\/strong\u003e The UPC for the Sierra 18-99546 Check Valve Assembly is 736983856203.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-99546 check valve require any special tools to install?\u003c\/strong\u003e The 18-99546 is a complete valve assembly designed as a direct swap for the existing check valve in a compatible oil change pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of marine equipment does the 18-99546 belong to?\u003c\/strong\u003e The Sierra 18-99546 Check Valve Assembly is listed under marine oil change pumps and their replacement components.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446163163,"sku":"SIE-18-99546","price":27.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-551-33CV_lg__66931.1558112053.500.750.jpg?v=1785188454","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-99546-check-valve-assembly-for-marine-oil-change-pumps","provider":"Good Vibes Marina","version":"1.0","type":"link"}