{"product_id":"sierra-18-3417-water-pump-base-for-mercruiser-replaces-46-57234a1-fits-mc-i-r-drives-without-flush-screw-in-housing-1970-1984","title":"Sierra Water Pump Base 18-3417, Replaces Mercruiser 46-57234A1, Fits MC-I \u0026 R Drives 1970-1984","description":"\u003cp\u003eThe Sierra 18-3417 Water Pump Base is a precision machined replacement base for the water pump assembly on MerCruiser MC-I \u0026amp; R stern drives without a flush screw in the gear housing. It is built to the same fit, form, and function as the original equipment part it replaces and is intended as a direct install for units within the applicable serial number range, restoring proper water pump seating and cooling system integrity on affected drives.\u003c\/p\u003e\u003cp\u003eThis is a compact, machined component measuring 0.39 x 0.39 x 0.39 inches and weighing 0.22 pounds. It is cross-referenced to GLM 12310, Mallory 9-43306, and Mercruiser 46-57234A1, so buyers who know any of these numbers can confirm they are ordering the correct part. Every Sierra part is backed by Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003eImportant fitment note: units that have been retro-fitted with an Alpha style lower unit (no pre-load pin in the top of the driveshaft) must use Alpha style parts instead, part numbers 18-3320 or 18-3420, rather than the 18-3417.\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 18-3417\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.22 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315908\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e MC-I \u0026amp; R drives without flush screw in gear housing (1970-1984)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Number Range:\u003c\/strong\u003e 2763442 - 6854392\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 12310, Mallory 9-43306, Mercruiser 46-57234A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eMC-I \u0026amp; R drives without a flush screw in the gear housing (1970-1984), serial numbers 2763442 through 6854392. Units retro-fitted with an Alpha style lower unit (no pre-load pin in top of driveshaft) require Alpha style parts 18-3320 or 18-3420 instead.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 12310\u003c\/li\u003e\n\u003cli\u003eMallory 9-43306\u003c\/li\u003e\n\u003cli\u003eMercruiser 46-57234A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3417 Water Pump Base fit?\u003c\/strong\u003e The 18-3417 fits MerCruiser MC-I \u0026amp; R drives that do not have a flush screw in the gear housing, covering units in the serial number range 2763442 through 6854392 (1970-1984).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3417 interchangeable with the Mercruiser OEM part?\u003c\/strong\u003e Yes, the 18-3417 is directly interchangeable with Mercruiser OEM number 46-57234A1, as well as GLM 12310 and Mallory 9-43306.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this water pump base weigh?\u003c\/strong\u003e The Sierra 18-3417 Water Pump Base weighs 0.22 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of part number 18-3417?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches, a compact machined component that sits within the water pump assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3417 fit a drive that has a flush screw in the gear housing?\u003c\/strong\u003e No. The 18-3417 is designed specifically for units without a flush screw in the gear housing; units with a flush screw use a different Sierra part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMy drive has been retro-fitted with an Alpha style lower unit, can I still use the 18-3417?\u003c\/strong\u003e No. Units retro-fitted with an Alpha style lower unit (no pre-load pin in the top of the driveshaft) must use Alpha style parts instead, Sierra part 18-3320 or 18-3420, not the 18-3417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the finish on the 18-3417 Water Pump Base?\u003c\/strong\u003e The Sierra 18-3417 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3417 come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3417 Water Pump Base is covered under Sierra's customer satisfaction warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my serial number matches this part?\u003c\/strong\u003e The 18-3417 is designated for units without a flush screw in the gear housing falling within serial numbers 2763442 to 6854392; check your drive's serial number tag against this range before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3417 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-3417 is a Sierra aftermarket water pump base engineered to meet or exceed the original equipment part it replaces, Mercruiser 46-57234A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years does the 18-3417 Water Pump Base cover?\u003c\/strong\u003e This water pump base is designated for MC-I \u0026amp; R drives without a flush screw in the gear housing from 1970-1984.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988147974363,"sku":"SIE-18-3417","price":29.92,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3417_lg__62852.1558125879.500.750.jpg?v=1785189212","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3417-water-pump-base-for-mercruiser-replaces-46-57234a1-fits-mc-i-r-drives-without-flush-screw-in-housing-1970-1984","provider":"Good Vibes Marina","version":"1.0","type":"link"}