{"product_id":"3-port-pulse-vacuum-fuel-pump-small-engine-mower-generator-replacement","title":"3-Port Pulse Vacuum Fuel Pump Small Engine Mower Generator Replacement","description":"\u003ch2\u003e3-Port Pulse Vacuum Fuel Pump Small Engine Mower Generator Replacement\u003c\/h2\u003e\n\n\u003cp\u003eAftermarket replacement \u003cstrong\u003epulse \/ vacuum-operated fuel pump\u003c\/strong\u003e for compatible small petrol engines and outdoor power equipment. This style of pump uses pressure pulses from the engine crankcase or intake system to operate an internal diaphragm and move fuel from the tank to the carburettor.\u003c\/p\u003e\n\n\u003ch3\u003eComponents Identified From the Product Photos\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1 x complete round diaphragm fuel pump assembly\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eBlack moulded pump housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 x hose connections\u003c\/strong\u003e for fuel inlet, fuel outlet and pulse\/vacuum line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2 x integrated mounting ears\u003c\/strong\u003e with bolt holes\u003c\/li\u003e\n\u003cli\u003eFour perimeter case screws securing the pump body\u003c\/li\u003e\n\u003cli\u003eCentral breather \/ filter insert visible in the pump cover\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSupplied as pictured.\u003c\/strong\u003e Fuel hose, hose clips, mounting bolts and fuel filter are not shown and are not advertised as included.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eGeneric dimension-and-reference based listing for compatible \u003cstrong\u003esmall petrol engines, ride-on mowers, generators and other outdoor power equipment\u003c\/strong\u003e using the same round three-port pulse-pump layout.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e This generic listing is not a universal-fit claim. Buyers must compare the three hose ports, mounting ears and original part number.\u003c\/p\u003e\n\n\u003ch3\u003eOE \/ Manufacturer Cross-References\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBriggs \u0026amp; Stratton 597338 \/ 808656\u003c\/strong\u003e – pump-family comparison references\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJohn Deere LG808656 \/ M145667\u003c\/strong\u003e – compatible-reference family\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e491922 \/ 691034 \/ 692313 \/ 808492\u003c\/strong\u003e – commonly used legacy search\/cross-reference numbers for this pump style\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe Moto Mania pump is an \u003cstrong\u003eunbranded aftermarket replacement\u003c\/strong\u003e. The numbers above are genuine\/OE comparison references for identifying the compatible pump family; they are not claimed as the manufacturer MPN of the supplied pump. Google Shopping MPN is therefore left blank.\u003c\/p\u003e\n\n\u003ch3\u003eHow This Pump Works\u003c\/h3\u003e\n\u003cp\u003eBriggs \u0026amp; Stratton describes this type as a pulse-operated fuel pump. Engine vacuum\/pressure pulses move the internal diaphragm and check valves, drawing fuel from the tank and delivering it to the carburettor when the fuel tank is positioned too low for reliable gravity feed.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Symptoms of a Faulty Fuel Pump\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngine starts but stops as the carburettor bowl empties\u003c\/li\u003e\n\u003cli\u003ePoor fuel delivery under load\u003c\/li\u003e\n\u003cli\u003eLong cranking or difficult starting after the machine has been standing\u003c\/li\u003e\n\u003cli\u003eVisible cracking, leakage or damage to the pump body\u003c\/li\u003e\n\u003cli\u003eNo fuel movement despite clear fuel lines and a clean filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Compatibility Checks\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompare all \u003cstrong\u003ethree hose-port positions\u003c\/strong\u003e with the existing pump.\u003c\/li\u003e\n\u003cli\u003eCheck the spacing and orientation of the \u003cstrong\u003etwo mounting ears\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eConfirm the engine uses a pulse\/vacuum-operated pump rather than an electric pump.\u003c\/li\u003e\n\u003cli\u003eMatch the original OEM\/reference number wherever possible.\u003c\/li\u003e\n\u003cli\u003eCheck fuel-hose internal diameter before installation.\u003c\/li\u003e\n\u003cli\u003eRoute the pulse line exactly as originally fitted and keep all hoses clear of hot or moving components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMany pulse pumps look very similar externally but can have different hose orientation, flow characteristics and mounting arrangements. Always compare the existing part and engine parts diagram before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Advice\u003c\/h3\u003e\n\u003cp\u003eClamp or shut off the fuel supply before removing the old pump. Transfer each hose one at a time so the inlet, outlet and pulse connections are not mixed up. After installation, run the engine and carefully check all hose joints and the pump body for fuel leaks.\u003c\/p\u003e\n\n\u003ch3\u003eDelivery \u0026amp; Returns\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFast UK dispatch\u003c\/li\u003e\n\u003cli\u003eFree UK delivery where shown on the product page\u003c\/li\u003e\n\u003cli\u003e30-day returns subject to the Moto Mania returns policy\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Unbranded","offers":[{"title":"Default Title","offer_id":57389486702967,"sku":"01957-ANF","price":9.0,"currency_code":"SHP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0528\/8771\/6007\/files\/20260730_122615.jpg?v=1786630835","url":"https:\/\/www.motomaniauk.com\/products\/3-port-pulse-vacuum-fuel-pump-small-engine-mower-generator-replacement","provider":"Moto Mania UK","version":"1.0","type":"link"}