{"product_id":"fuel-pump-repair-kit-21-42990a7-for-mercury-mariner-35-275-hp-square-pump-outboards-replaces-18-7817","title":"Engineered Marine Products Fuel Pump Repair Kit 1399-39020, Replaces 21-42990A7 18-7817, Mercury Mariner Square Pump Outboards","description":"\u003cp\u003eThis fuel pump repair kit from Engineered Marine Products is built to restore the fuel delivery system on Mercury Mariner outboards equipped with the square-style fuel pump. Rather than replacing the entire pump assembly, this kit supplies the wear components needed to bring a tired or leaking pump back to proper working condition, saving the cost of a full pump replacement. The kit is constructed from plastic and rubber components engineered to withstand continuous exposure to fuel and the vibration and heat found in an outboard engine compartment. Included in the kit is a fuel pump with filter, giving the installer the core parts needed to complete the rebuild in one job rather than sourcing individual pieces separately. Engineered Marine Products backs this kit with a 1 year manufacturer warranty, reflecting confidence in the materials and fit. This kit is intended for Mercury Mariner outboards using the square fuel pump design across a wide horsepower range, from smaller kickers up through larger offshore-rated outboards. Boat owners and marine technicians use kits like this one when a fuel pump is showing signs of reduced fuel pressure, hard starting, or a visible fuel leak at the pump diaphragm. Because the part restores original pump function using the manufacturer's specified components, it is a straightforward, cost-effective way to keep an outboard's fuel system reliable without replacing the whole pump housing.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Engineered Marine Products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 1399-39020\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Fuel Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Fuel Pump With Filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic, Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840080472386\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Warranty:\u003c\/strong\u003e 1 year\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 21-42990A7, 18-7817\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Horsepower Range:\u003c\/strong\u003e 35, 40, 45, 50, 55, 60, 65, 75, 80, 90, 100, 115, 125, 135, 150, 175, 200, and 275 horsepower\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Pump Type:\u003c\/strong\u003e Square fuel pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Type:\u003c\/strong\u003e Boat\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercury Mariner outboards that use the square-style fuel pump, spanning 35 through 275 horsepower models.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003e21-42990A7, 18-7817\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the 1399-39020 fuel pump kit include?\u003c\/strong\u003e The 1399-39020 kit from Engineered Marine Products includes a fuel pump with filter, giving you the core components needed to rebuild the pump in one job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards does this fuel pump kit fit?\u003c\/strong\u003e This kit fits Mercury Mariner outboards that use the square-style fuel pump, covering models from 35 up to 275 horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 1399-39020 replace OEM part 18-7817?\u003c\/strong\u003e Yes, part 1399-39020 is a direct replacement for OEM number 18-7817 as well as 21-42990A7.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this kit compatible with 21-42990A7?\u003c\/strong\u003e Yes, the Engineered Marine Products kit 1399-39020 replaces OEM number 21-42990A7.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the fuel pump kit made from?\u003c\/strong\u003e The 1399-39020 fuel pump repair kit is made from plastic and rubber components designed to handle continuous fuel exposure and engine compartment heat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the fuel pump kit weigh?\u003c\/strong\u003e The 1399-39020 fuel pump repair kit weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine or aftermarket fuel pump kit?\u003c\/strong\u003e This is an aftermarket kit manufactured by Engineered Marine Products, built to replace the OEM square fuel pump on compatible Mercury Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the kit come with a warranty?\u003c\/strong\u003e Yes, the 1399-39020 fuel pump kit is backed by a 1 year manufacturer warranty from Engineered Marine Products.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this kit to fix a leaking fuel pump?\u003c\/strong\u003e Yes, this kit is designed for rebuilding a Mercury Mariner square fuel pump that is leaking or losing fuel pressure, using the included pump and filter components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat horsepower engines can use the 1399-39020 kit?\u003c\/strong\u003e The 1399-39020 kit is compatible with square-pump Mercury Mariner outboards ranging from 35 to 275 horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace the whole fuel pump assembly or just this kit?\u003c\/strong\u003e The 1399-39020 kit lets you rebuild the existing square fuel pump on your Mercury Mariner outboard rather than purchasing an entirely new pump assembly.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991280693467,"sku":"EMP-1399-39020","price":96.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP_1399-39020_Mercury_Fuel_Pump_Repair_Kit__52981.1722518117.500.750.jpg?v=1785188788","url":"https:\/\/www.goodvibesmarina.com\/products\/fuel-pump-repair-kit-21-42990a7-for-mercury-mariner-35-275-hp-square-pump-outboards-replaces-18-7817","provider":"Good Vibes Marina","version":"1.0","type":"link"}