{"product_id":"water-pump-kit-for-johnson-evinrude-omc-brp-outboard-replaces-omc-391698-without-housing-sierra-18-3400","title":"Sierra 18-3400 Water Pump Kit Without Housing for Johnson\/Evinrude Outboard, Replaces 391698","description":"\u003cp\u003eThe Sierra 18-3400 Water Pump Kit Without Housing is a complete rebuild kit for the water pump on Johnson\/Evinrude (OMC\/BRP) outboard motors. Because it is sold without a housing, it is intended for owners whose existing pump housing is still in good condition and only the wearing internals need replacement. The kit bundles every component that typically fails or wears out in service, including the impeller, wear plate, water pump cup, impeller key, grommets, oil seal, bolts, and O-rings, so a full internal rebuild can be completed in one job instead of sourcing parts individually.\u003c\/p\u003e\u003cp\u003eAt the core of the kit is the impeller (Sierra 18-3050, O.E. 386084), the part most responsible for pump output and overheating problems when it degrades. Pairing it with fresh seals, a new wear plate, and new O-rings in the same service helps restore proper cooling flow and reduces the chance of a repeat failure shortly after the impeller alone is swapped. This kit is designed to replace OEM-numbered water pump kits on applicable Johnson\/Evinrude outboards.\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 18-3400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Kit, Without Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Johnson\/Evinrude (OMC\/BRP) Outboard Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999875594\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 391698, 0394711\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 18-2025 Oil Seal, 18-2392 Grommet, 18-3050 Impeller (O.E. 386084), 18-3178 Wear Plate, 18-3179 Water Pump Cup, 18-3326 Impeller Key, 18-3329 Grommet, 18-3369 Bolts, 18-7116 O-Ring, 18-7139 O-Ring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Johnson\/Evinrude (OMC\/BRP) outboard motors that use water pump kit 391698 or 0394711.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e391698\u003c\/li\u003e\n\u003cli\u003e0394711\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3400 water pump kit include?\u003c\/strong\u003e The kit contains a full set of internal water pump components: 18-2025 oil seal, 18-2392 grommet, 18-3050 impeller, 18-3178 wear plate, 18-3179 water pump cup, 18-3326 impeller key, 18-3329 grommet, 18-3369 bolts, 18-7116 O-ring, and 18-7139 O-ring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3400 kit include the pump housing?\u003c\/strong\u003e No. The Sierra 18-3400 is a water pump kit without housing, so it is meant for rebuilding a pump whose existing housing is still usable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-3400 replace?\u003c\/strong\u003e The Sierra 18-3400 replaces OEM numbers 391698 and 0394711 on Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat motors is this water pump kit designed for?\u003c\/strong\u003e This kit is built for Johnson\/Evinrude (OMC\/BRP) outboard motors that use water pump kit 391698 or 0394711.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich impeller comes in the 18-3400 kit?\u003c\/strong\u003e The kit includes the Sierra 18-3050 impeller, which corresponds to OEM part number 386084.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3400 water pump kit weigh?\u003c\/strong\u003e The Sierra 18-3400 weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3400 a genuine Sierra part or a generic substitute?\u003c\/strong\u003e It is a Sierra-branded water pump kit, manufacturer part number 18-3400, engineered as a direct replacement for the listed OEM Johnson\/Evinrude numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy replace more than just the impeller when rebuilding an outboard water pump?\u003c\/strong\u003e The 18-3400 kit bundles the impeller with the wear plate, water pump cup, seals, grommets, and O-rings because these parts wear alongside the impeller, and replacing them together in one job reduces the chance of a repeat pump failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3400 water pump kit?\u003c\/strong\u003e The UPC for the Sierra 18-3400 water pump kit is 030999875594.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-3400 be used if I am also replacing the pump housing?\u003c\/strong\u003e The 18-3400 does not include a housing, so if the housing needs replacement it must be sourced separately; this kit covers only the internal wearing components for Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat impeller key is used in the 18-3400 kit?\u003c\/strong\u003e The kit includes impeller key 18-3326 along with the 18-3050 impeller it is paired with.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many O-rings come in the 18-3400 kit?\u003c\/strong\u003e Two O-rings are included in the Sierra 18-3400 kit: 18-7116 and 18-7139.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988147744987,"sku":"SIE-18-3400","price":41.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3400_lg__73448.1558125297.500.750.jpg?v=1785189177","url":"https:\/\/www.goodvibesmarina.com\/products\/water-pump-kit-for-johnson-evinrude-omc-brp-outboard-replaces-omc-391698-without-housing-sierra-18-3400","provider":"Good Vibes Marina","version":"1.0","type":"link"}