{"product_id":"fuel-pump-kit-for-mercury-outboard-replaces-55278a4-55278a3-sierra-18-7809","title":"Sierra 18-7809 Fuel Pump Kit for Mercury Outboard, Replaces 55278A4","description":"\u003cp\u003eThe Sierra 18-7809 Fuel Pump Kit is a replacement fuel pump built for Mercury Outboard engines, engineered to meet or exceed the specifications of the original equipment part it replaces. It functions as a direct equivalent to Mercury Marine OEM fuel pump 55278A4, giving boat owners a reliable way to restore correct fuel delivery without sourcing a factory-only part. The kit is constructed from aluminum and stainless steel for resistance to corrosion in the harsh marine environment, and it uses a bolted inlet connection paired with an FNPT outlet connection for a secure, leak-resistant fit. Operation is automatic and the pump is designed for tank-mount installation, matching the layout of the outboard fuel system it is intended to service.\u003c\/p\u003e\u003cp\u003eThis is a compact, precision-fit component at 0.39 x 0.39 x 0.39 inches and 0.02 pounds, so it installs into the existing fuel pump location without modification. Sierra manufactures this kit to the same standards it supplies to OEM engine builders and boat manufacturers, and the part is backed by Sierra's limited warranty.\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 18-7809\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Mercury Outboard Fuel Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem 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 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection Type:\u003c\/strong\u003e Bolted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection Size:\u003c\/strong\u003e 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection Type:\u003c\/strong\u003e FNPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection Size:\u003c\/strong\u003e 0.5 inches\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 Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Fuel Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Limited Warranty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282259952\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 55278A4\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7809 fuel pump kit replace?\u003c\/strong\u003e The 18-7809 kit is a direct equivalent to Mercury Marine OEM fuel pump 55278A4, built to meet or exceed the original part's specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-7809 fuel pump kit fit?\u003c\/strong\u003e This fuel pump kit is designed for Mercury Outboard engines that originally used the Mercury Marine 55278A4 fuel pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-7809 made from?\u003c\/strong\u003e It is constructed from aluminum and stainless steel, chosen for corrosion resistance in marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-7809 fuel pump kit mounted?\u003c\/strong\u003e The pump uses a tank-mount design with a bolted inlet connection and an FNPT outlet connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the fuel pump operation manual or automatic?\u003c\/strong\u003e The Sierra 18-7809 fuel pump operates automatically once installed in the outboard's fuel system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-7809 fuel pump kit?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches, a compact size that fits the factory pump location without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7809 weigh?\u003c\/strong\u003e The kit weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this fuel pump genuine OEM or aftermarket?\u003c\/strong\u003e The Sierra 18-7809 is an aftermarket replacement engineered to meet or exceed the specifications of the Mercury Marine OEM part 55278A4 it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-7809 kit?\u003c\/strong\u003e The kit includes the fuel pump as a complete assembly, listed by Sierra as the Fuel Pump Kit component set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuel type is the 18-7809 pump designed for?\u003c\/strong\u003e It is designed for gasoline fuel systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-7809 come with a warranty?\u003c\/strong\u003e Yes, the fuel pump kit is backed by Sierra's limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the inlet and outlet connections on the 18-7809?\u003c\/strong\u003e Both the inlet and outlet connections on this fuel pump kit measure 0.5 inches, with a bolted inlet and an FNPT outlet.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988388458715,"sku":"SIE-18-7809","price":6.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7809_lg__68110.1558130757.500.750.jpg?v=1785188221","url":"https:\/\/www.goodvibesmarina.com\/products\/fuel-pump-kit-for-mercury-outboard-replaces-55278a4-55278a3-sierra-18-7809","provider":"Good Vibes Marina","version":"1.0","type":"link"}