{"product_id":"fuel-pump-kit-for-yamaha-115-300-hp-2-stroke-v-4-v-6-outboards-1984-2004-replaces-oem-6e5-24411-00-00-mpn-18-7788","title":"Sierra 18-7788 Fuel Pump Kit, Replaces 6E5-24411-00-00, for Yamaha V-4 and V-6 Outboards","description":"\u003cp\u003eThe Sierra 18-7788 Fuel Pump Kit is a mechanical fuel pump rebuild kit for Yamaha V-4 and V-6 outboard engines, engineered to restore the fuel pump diaphragm and gasket to factory sealing performance. Fuel pump diaphragms and gaskets harden and crack with age and exposure to modern fuels, leading to fuel leaks, rough idle, hesitation, or a pump that will not draw fuel at all. This kit replaces those wear items so the pump can rebuild pressure and deliver a steady fuel supply to the carburetors.\u003c\/p\u003e\u003cp\u003eKit 18-7788 contains two components: a rear gasket (18-7843) with an OEM equivalent number of 6E5-24411-00-00, and a top diaphragm (18-7842) with an OEM equivalent number of 6E5-24471-00-00. Both parts are sized and shaped to match the original Yamaha fuel pump assembly, so the pump housing seals correctly and pumps fuel without bypass leakage once reassembled. The kit uses a hose barb inlet and a barbed outlet connection sized for 0.5 inch fuel line, consistent with the tank-mounted, mechanically operated fuel pump design used on these outboards.\u003c\/p\u003e\u003cp\u003eThis kit is intended for technicians and boat owners rebuilding an existing Yamaha V-4 or V-6 outboard fuel pump rather than replacing the entire pump assembly, offering a lower-cost repair path when the pump body itself is still serviceable.\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 18-7788\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fuel Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Yamaha V-4 and V-6 outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Gasket (Rear) 18-7843, Diaphragm (Top) 18-7842\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6E5-24411-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent OEM Numbers:\u003c\/strong\u003e Gasket (Rear) 6E5-24411-00-00; Diaphragm (Top) 6E5-24471-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Tank Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation Mode:\u003c\/strong\u003e Mechanical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e Hose Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection:\u003c\/strong\u003e Barb, 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 6.75 x 6 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282105785\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha V-4 and V-6 outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6E5-24411-00-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7788 Fuel Pump Kit fit?\u003c\/strong\u003e The 18-7788 kit fits Yamaha V-4 and V-6 outboard engines that use this fuel pump design.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in kit 18-7788?\u003c\/strong\u003e The kit contains a rear gasket (part 18-7843) and a top diaphragm (part 18-7842) for the fuel pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does the 18-7788 kit replace?\u003c\/strong\u003e It replaces OEM number 6E5-24411-00-00 on Yamaha V-4 and V-6 outboard fuel pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo the individual gasket and diaphragm have their own OEM numbers?\u003c\/strong\u003e Yes: the rear gasket 18-7843 corresponds to OEM 6E5-24411-00-00, and the top diaphragm 18-7842 corresponds to OEM 6E5-24471-00-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include a full replacement fuel pump?\u003c\/strong\u003e No, the 18-7788 kit is a rebuild kit containing the gasket and diaphragm only, not a complete fuel pump assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the outlet connection on the fuel pump this kit services?\u003c\/strong\u003e The fuel pump uses a barbed outlet connection sized at 0.5 inches, paired with a hose barb inlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the fuel pump this kit services mechanical or electric?\u003c\/strong\u003e It is a mechanically operated, tank-mounted fuel pump, consistent with the 18-7788 rebuild kit's fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-7788 kit packaging?\u003c\/strong\u003e Item dimensions for the 18-7788 kit are 6.75 x 6 x 1 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7788 Fuel Pump Kit weigh?\u003c\/strong\u003e The kit weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the diaphragm and gasket in my Yamaha fuel pump?\u003c\/strong\u003e Fuel pump diaphragms and gaskets harden and crack over time, which can cause fuel leaks or a loss of pump pressure; the 18-7788 kit replaces both wear parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-7788 a genuine Yamaha part or an aftermarket equivalent?\u003c\/strong\u003e 18-7788 is a Sierra part manufactured as an equivalent to OEM number 6E5-24411-00-00 for Yamaha V-4 and V-6 outboards, not a Yamaha-branded part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988388491483,"sku":"SIE-18-7788","price":13.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7788_lg__88555.1558132509.500.750.jpg?v=1785188658","url":"https:\/\/www.goodvibesmarina.com\/products\/fuel-pump-kit-for-yamaha-115-300-hp-2-stroke-v-4-v-6-outboards-1984-2004-replaces-oem-6e5-24411-00-00-mpn-18-7788","provider":"Good Vibes Marina","version":"1.0","type":"link"}