{"product_id":"mercury-mercruiser-fuel-pump-electric-fits-mcm-mie-4-3l-lh-5-0l-5-7l-gen-861155a3","title":"Quicksilver – Low-Pressure Fuel Boost Pump | MerCruiser Fuel System | Marine-Grade Construction | 861155A3","description":"\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQuicksilver – Low-Pressure Fuel Boost Pump | MerCruiser Fuel System | Marine-Grade Construction | 861155A3\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIf\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e you’ve ever felt an engine hesitate as you throttle up, you know how unsettling it can be. Smooth, confident fuel delivery is the heartbeat of a good boating day, and this Quicksilver fuel boost pump \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eis designed\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to bring that steady rhythm back.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It’s one of those Mercury Marine parts you install and immediately appreciate — not because it draws attention to itself, but because your engine suddenly feels younger, steadier, and more eager to run.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLow-pressure fuel boost pump for select MerCruiser engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eIncludes pump, fittings, and wiring with \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003emulti-pin\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e connector\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEnsures consistent fuel delivery to high-pressure components\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt to Mercury Marine OEM standards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury Marine part number 861155A3\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eUsed on select MerCruiser sterndrive and inboard engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCommon across 4.3L, 5.0L, 5.7L, and various multi-port injection platforms\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for cruisers, runabouts, cuddy cabins, larger bowriders, and heavy-loaded family boats\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWorks in both freshwater and coastal environments\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOnce installed, the pump delivers a steady\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ereliable flow of fuel \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ethat makes\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the engine feel tight and responsive.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It helps prevent starvation during hard acceleration, sharp turns, or rough water — moments when under-fueling can lead to stumbling or hesitation. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eT\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ehe boost pump \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eassists\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the high-pressure system by \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003efeeding\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e it exactly what it needs, \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ekeeping the whole fuel stream\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e balanced and controlled.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThe pump’s marine-grade construction \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003egives\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e it the durability it needs to \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003elive in a\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e hot, vibrating engine compartment.\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e The fittings seat cleanly, and the included wiring harness makes the electrical connection \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003esimple and secure\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e. That clean fitment matters. When everything snaps into place the way it should, it takes the stress out of the job.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOnce the engine fires up and settles into a smooth idle, the improvement is immediate. Throttle response sharpens, mid-range feels cleaner, and long runs become easier on the engine and the driver.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFuel components are unforgiving places to cut corners. Aftermarket pumps may produce inconsistent pressure, struggle under heat, or fail sooner than expected. A genuine Mercury Marine part is engineered to deliver reliable flow and hold up to real-world marine conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWith OEM, you get the right connector, the \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eright\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e pressure curve, the \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eright\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e flow rate, and the durability that keeps you away from costly fuel-system diagnostics. Experienced boaters know: fuel delivery is one area where OEM matters most.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines does this pump fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits various MerCruiser sterndrive and inboard engines that require a low-pressure boost pump.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes it better than aftermarket pumps?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOEM pumps maintain proper pressure and \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eare \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ebuilt\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e to withstand marine heat and vibration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it’s correct for my setup?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Check your manual. If it calls for part number 861155A3, this is your pump.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in saltwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eits\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e marine-grade design handles both environments well.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation straightforward?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes, especially with the included wiring connector and fittings.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45626587971875,"sku":"861155A3","price":756.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/861155a3.jpg?v=1761578222","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-mercruiser-fuel-pump-electric-fits-mcm-mie-4-3l-lh-5-0l-5-7l-gen-861155a3","provider":"PartsVu","version":"1.0","type":"link"}