{"product_id":"mercury-648771-poppet-diaphram","title":"Mercury 648771 Poppet Diaphragm","description":"\u003ch2\u003eMercury 648771 Poppet Diaphragm\u003c\/h2\u003e\n\u003cp\u003eMercury 648771 is a genuine Mercury poppet diaphragm used in compatible Mercury, Mariner, Verado, and MerCruiser cooling system assemblies where this exact part number is specified by the factory parts diagram.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury replacement poppet diaphragm\u003c\/li\u003e\n\u003cli\u003eUsed in compatible cooling system pressure relief \/ poppet valve assemblies\u003c\/li\u003e\n\u003cli\u003eFor select Mercury and Mariner outboard, L6 Verado, and MerCruiser inboard applications where specified\u003c\/li\u003e\n\u003cli\u003eDirect replacement when Mercury part number 648771 is called out\u003c\/li\u003e\n\u003cli\u003eHelps support proper cooling system pressure regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment \/ Product Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Mercury\u003c\/li\u003e\n\u003cli\u003ePart Number: 648771\u003c\/li\u003e\n\u003cli\u003eProduct: Poppet Diaphragm\u003c\/li\u003e\n\u003cli\u003eApplication Range: Select 75-250 HP Mercury and Mariner 2-stroke and 4-stroke outboards, L6 Verado outboards, and various MerCruiser inboard engines\u003c\/li\u003e\n\u003cli\u003eSystem: Cooling \/ Poppet Valve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePoppet diaphragm fitment depends on engine model, serial number, cooling system layout, and the exact poppet valve assembly being serviced. Verify fitment with your Mercury, Mariner, Verado, or MerCruiser serial number and factory parts diagram before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury 648771 poppet diaphragm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePoppet valve, spring, cover, gaskets, seals, bolts, thermostats, and related cooling system parts are not included unless listed separately.\u003c\/p\u003e\n\u003ch3\u003eWhy You Should Buy\u003c\/h3\u003e\n\u003cp\u003eThe poppet diaphragm is part of the cooling system pressure relief circuit. A worn or damaged diaphragm can contribute to cooling pressure issues, leaks, or inconsistent water flow. Use the correct Mercury diaphragm for the exact engine and parts diagram being serviced.\u003c\/p\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cp\u003eUsed on select 75-250 HP Mercury and Mariner 2-stroke and 4-stroke outboards, L6 Verado outboards, and various MerCruiser inboard engines where the factory parts listing calls for poppet diaphragm 648771.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eIs this the complete poppet valve kit?\u003c\/h4\u003e\n\u003cp\u003eNo. This listing is for the poppet diaphragm only.\u003c\/p\u003e\n\u003ch4\u003eDoes this fit every 75-250 HP Mercury outboard?\u003c\/h4\u003e\n\u003cp\u003eNo. Fitment varies by engine model, serial number, and cooling system configuration. Verify by parts diagram before ordering.\u003c\/p\u003e\n\u003ch4\u003eCan Wakeboss help confirm fitment?\u003c\/h4\u003e\n\u003cp\u003eYes. Send your engine model and serial number through \u003ca href=\"https:\/\/wakeboss.com\/pages\/ask-a-parts-pro\"\u003eAsk a Parts Pro\u003c\/a\u003e and we can help check the correct cooling system diagram.\u003c\/p\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48609516880104,"sku":"648771","price":8.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/9927\/6776\/files\/648771-1_21b1d46c-5222-4a4b-8e55-ec8496017464.jpg?v=1781891778","url":"https:\/\/wakeboss.com\/products\/mercury-648771-poppet-diaphram","provider":"Wakeboss","version":"1.0","type":"link"}