{"product_id":"merc-322","title":"Mercury MerCruiser — 3\/8-16 x 2-3\/4 in. Water Pump Screw — 47688","description":"\u003ch2\u003eMercury MerCruiser Water Pump Screw 47688 | 3\/8-16 × 2-3\/4 in.\u003c\/h2\u003e\n\u003cp\u003eThe Mercury MerCruiser \u003cstrong\u003e47688\u003c\/strong\u003e is a genuine OEM 3\/8-16 × 2.750 in. hex screw used on select MerCruiser circulating-water-pump and front-cover assemblies. Mercury diagrams identify it as a water-pump-to-cylinder-block fastener, commonly used alongside shorter 32132 mounting screws.\u003c\/p\u003e\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4.3L \/ 262 CID V6\u003c\/li\u003e\n\u003cli\u003e4.3L Alpha \/ Bravo\u003c\/li\u003e\n\u003cli\u003e350 MAG MPI\u003c\/li\u003e\n\u003cli\u003eAdditional GM-based MerCruiser engines using the specified circulating-water-pump mounting arrangement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMercury also uses 47688 in some outboard powerhead assemblies, so match it by part number and diagram rather than engine family alone. Confirm your engine serial number and water-pump\/front-cover diagram before ordering, since the same assembly can use several different bolt lengths, including 32132 at 1.750 in. and 47688 at 2.750 in.\u003c\/p\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart number: 47688\u003c\/li\u003e\n\u003cli\u003eFull service number: 10-47688\u003c\/li\u003e\n\u003cli\u003eBrand: Mercury Marine\u003c\/li\u003e\n\u003cli\u003eOfficial product type: Water pump mounting screw\u003c\/li\u003e\n\u003cli\u003eThread: 3\/8-16 UNC\u003c\/li\u003e\n\u003cli\u003eLength: 2.750 in. \/ 69.9 mm\u003c\/li\u003e\n\u003cli\u003eSystem: Engine cooling \/ circulating water pump\u003c\/li\u003e\n\u003cli\u003eGTIN: 745061155220\u003c\/li\u003e\n\u003cli\u003eTypical quantity: 1 per applicable assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e32132 — 3\/8-16 × 1.750 in. water-pump screw\u003c\/li\u003e\n\u003cli\u003e34897 — Water pump gasket\u003c\/li\u003e\n\u003cli\u003e35342 \/ 8M0076418 — Water pump stud\u003c\/li\u003e\n\u003cli\u003e47277 — Water pump pulley screw\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\n\u003cp\u003eReplace the screw if the threads or hex head are damaged, corrosion is significant, or the fastener cannot be tightened correctly. Inspect all water-pump mounting hardware whenever the circulating pump is removed.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eInstall in the original water-pump-to-block position and use the applicable MerCruiser service torque. Check the pump gasket, mating threads, shorter mounting screws, studs, and pulley hardware while the assembly is apart.\u003c\/p\u003e\n\u003ch3\u003eAlternate\/Superseded Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e47688 — Mercury OEM part number\u003c\/li\u003e\n\u003cli\u003e10-47688 — full Mercury service number\u003c\/li\u003e\n\u003cli\u003eNo verified superseding number\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow is this different from 32132?\u003c\/strong\u003e Both are water-pump mounting screws on the same thread, but 47688 is 2.750 in. long while 32132 is 1.750 in.; they're used at different positions in the same assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit outboard engines too?\u003c\/strong\u003e Mercury also uses 47688 in some outboard powerhead assemblies. If you are unsure, match by part number and diagram rather than by engine family alone.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This screw is the right fastener when reassembling a MerCruiser circulating water pump or front cover and the original 2.750 in. mounting bolt is damaged or missing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon mistake:\u003c\/strong\u003e The most common mistake is confusing this with the shorter 32132 screw used in the same assembly. Matching bolt length and OEM number, not just thread size, avoids installing the wrong screw in the block.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSizing and fitment:\u003c\/strong\u003e If you are replacing water-pump hardware, check the gasket (34897), studs (35342 \/ 8M0076418), and pulley screw (47277) at the same time since they're part of the same assembly.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563860951076,"sku":"47688","price":5.39,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/images_aa3960c9-d806-46e2-8029-50d4f98934b7.jpg?v=1790286328","url":"https:\/\/marisolmarine.com\/products\/merc-322","provider":"Marisol Marine Company","version":"1.0","type":"link"}