{"product_id":"marine-fuel-pump-kit-for-mercury-outboard-replaces-mercury-42909a3-42909a4-sierra-18-7818-1","title":"Sierra Fuel Pump Kit 18-7818-1 for Mercury 115 HP 4 Cyl Outboards, Replaces 42909A3, 42909A4","description":"\u003cp\u003eThe Sierra Fuel Pump Kit 18-7818-1 is a direct-fit replacement fuel pump kit built for Mercury 115 HP (4 cylinder) outboards with engine serial number B209468 and up. It restores reliable fuel delivery from tank to carburetor on applicable Mercury 4-cylinder powerheads, giving you an OE-specification alternative to the original Mercury Marine fuel pump kit at the point where age or wear causes weak fuel pressure, hard starting, or rough running.\u003c\/p\u003e\u003cp\u003eThe kit is built with a metal body and uses hose barb connections, with a hose barb inlet fitting and a barb-style outlet fitting, each sized at 1.27 centimeters, for compatible fuel line hookup. It is designed for gasoline fuel systems. Sierra parts in this line are noted as meeting OE specification, so installers can expect the same fit, form, and function as the original Mercury Marine components it replaces.\u003c\/p\u003e\u003cp\u003eBecause this kit is application-specific to the 115 HP 4-cylinder Mercury outboard with the stated serial number cutoff, confirm your engine's HP rating and serial number against the listed range before ordering to ensure correct fitment.\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 18-7818-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Fuel Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercury 115 HP (4 Cylinder) outboards, engine serial number B209468 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e Mercury Marine 42909A3, 42909A4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\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 Hose Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection Size:\u003c\/strong\u003e 1.27 centimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection Type:\u003c\/strong\u003e Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection Size:\u003c\/strong\u003e 1.27 centimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury 115 HP (4 Cylinder) outboards, engine serial number B209468 and up\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 42909A3\u003c\/li\u003e\n\u003cli\u003eMercury Marine 42909A4\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-7818-1 fuel pump kit fit?\u003c\/strong\u003e The Sierra 18-7818-1 fuel pump kit fits Mercury 115 HP outboards with a 4-cylinder engine, specifically units with engine serial number B209468 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-7818-1 a direct replacement for the Mercury OEM fuel pump kit?\u003c\/strong\u003e Yes, 18-7818-1 replaces Mercury Marine OEM fuel pump kits 42909A3 and 42909A4 and is built to meet OE specification for fit and function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this kit cross-reference?\u003c\/strong\u003e This Sierra kit crosses over to Mercury Marine part numbers 42909A3 and 42909A4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my Mercury 115 HP outboard uses this fuel pump kit?\u003c\/strong\u003e Check your engine's serial number: the 18-7818-1 kit applies to Mercury 115 HP 4-cylinder outboards with engine serial number B209468 or higher.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-7818-1 fuel pump kit made of?\u003c\/strong\u003e The fuel pump kit body is made of metal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the inlet and outlet connections on this fuel pump kit?\u003c\/strong\u003e Both the inlet (hose barb) and outlet (barb) connections on the 18-7818-1 kit measure 1.27 centimeters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7818-1 fuel pump kit weigh?\u003c\/strong\u003e The kit weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuel type is this fuel pump kit designed for?\u003c\/strong\u003e The 18-7818-1 fuel pump kit is designed for gasoline fuel systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the fuel pump kit?\u003c\/strong\u003e The kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fuel pump kit fit a 6-cylinder Mercury outboard?\u003c\/strong\u003e No, the 18-7818-1 kit is designated specifically for the Mercury 115 HP 4-cylinder outboard application listed, not other cylinder configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra fuel pump kit meet OE specifications?\u003c\/strong\u003e Yes, the 18-7818-1 kit is noted as meeting OE specification, matching the performance of the original Mercury Marine parts it replaces.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988389507291,"sku":"SIE-18-7818-1","price":15.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__18749.1753840687.500.750.jpg?v=1785188867","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-fuel-pump-kit-for-mercury-outboard-replaces-mercury-42909a3-42909a4-sierra-18-7818-1","provider":"Good Vibes Marina","version":"1.0","type":"link"}