{"product_id":"marine-mechanical-fuel-pump-for-gm-v-8-305-307-350-400-replaces-omc-981650-and-volvo-penta-3855276-sierra-mpn-18-7268","title":"Sierra 18-7268 Fuel Pump for GM V-8 305, 307, 350, 400 Engines, Dual Diaphragm","description":"\u003cp\u003eThe Sierra 18-7268 is a dual diaphragm fuel pump engineered for GM V-8 marine engines displacing 305, 307, 350, and 400 cubic inches. It mounts directly to the engine's flange (Flange I.D. #41415, M6948) and delivers fuel at 5.25 - 6.5 PSI, matching the pressure requirements of the original equipment pump it replaces. Because it is a dual diaphragm design, this pump requires a sight glass for proper operation and monitoring.\u003c\/p\u003e\u003cp\u003eThe pump body is constructed of aluminum for corrosion resistance in a marine environment, and the unit includes a mounting gasket for installation. It uses a hose barb inlet connection and a flange outlet connection, and mounts to the front of the engine using the flange mounting type. This part is built to meet or exceed the specifications of the original equipment pump it replaces, and cross-references to several common OEM part numbers used across GM-based marine engine applications, making it straightforward to identify as the correct replacement.\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 18-7268\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM (V-8) 305, 307, 350, 400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Pressure:\u003c\/strong\u003e 5.25 - 6.5 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePump Type:\u003c\/strong\u003e Dual Diaphragm (Requires Sight Glass)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange I.D. Number:\u003c\/strong\u003e 41415, M6948\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection Type:\u003c\/strong\u003e Hose Barb\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection Type:\u003c\/strong\u003e Flange\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 3.27 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Mounting gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999322395\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM (V-8) 305, 307, 350, 400\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 77102\u003c\/li\u003e\n\u003cli\u003eOMC 981650\u003c\/li\u003e\n\u003cli\u003eOMC 3853792\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 3855276\u003c\/li\u003e\n\u003cli\u003eMallory 9-35412\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-7268 fuel pump fit?\u003c\/strong\u003e The Sierra 18-7268 fuel pump is designed for GM V-8 engines displacing 305, 307, 350, and 400 cubic inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuel pressure does this pump deliver?\u003c\/strong\u003e It delivers 5.25 to 6.5 PSI, matching the pressure range of the original GM V-8 fuel pump it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-7268 a single or dual diaphragm pump?\u003c\/strong\u003e It is a dual diaphragm fuel pump, which requires a sight glass for proper operation and monitoring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-7268 include a mounting gasket?\u003c\/strong\u003e Yes, a mounting gasket is included with the Sierra 18-7268 fuel pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the flange I.D. Number for this pump?\u003c\/strong\u003e The Sierra 18-7268 uses Flange I.D. #41415 and M6948, which should be matched against the engine's original pump flange for confirmation of fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-7268 cross-reference to?\u003c\/strong\u003e The Sierra 18-7268 cross-references to GLM 77102, OMC 981650, OMC 3853792, Volvo Penta 3855276, and Mallory 9-35412.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-7268 fuel pump made from?\u003c\/strong\u003e The pump body is made of aluminum, chosen for corrosion resistance in marine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the 18-7268 connect to the fuel line?\u003c\/strong\u003e The inlet connection is a hose barb type, and the outlet connection is a flange type.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-7268 fuel pump weigh?\u003c\/strong\u003e The Sierra 18-7268 fuel pump weighs 3.27 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the 18-7268 fuel pump mounted to the engine?\u003c\/strong\u003e It uses a flange mounting type and installs at the front of the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-7268 equivalent to the original GM fuel pump?\u003c\/strong\u003e Sierra states that the 18-7268 is built to meet or exceed the specifications of the original equipment fuel pump it replaces on GM V-8 305, 307, 350, and 400 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the physical dimensions of the 18-7268 fuel pump?\u003c\/strong\u003e The Sierra 18-7268 fuel pump measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988380954843,"sku":"SIE-18-7268","price":183.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-7268_lg__37224.1558130695.500.750.jpg?v=1785188043","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-mechanical-fuel-pump-for-gm-v-8-305-307-350-400-replaces-omc-981650-and-volvo-penta-3855276-sierra-mpn-18-7268","provider":"Good Vibes Marina","version":"1.0","type":"link"}