{"product_id":"merc-25","title":"Mercury MerCruiser Quicksilver Fuel Pump Gasket 34213 | 27-34213","description":"\u003ch2\u003eMercury MerCruiser Quicksilver Fuel Pump Gasket 34213 | 27-34213\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 34213 (service format: 27-34213)\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury \/ Quicksilver\u003cbr\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Mechanical Fuel Pump Mounting Gasket (OEM)\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e MerCruiser Fuel System\u003cbr\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mechanical fuel pump mounting flange \/ fuel pump block-off plate\u003cbr\u003e\n\u003cstrong\u003eQuantity Required:\u003c\/strong\u003e 1 per assembly\u003cbr\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 745061137059\u003cbr\u003e\n\u003cstrong\u003eApproximate Weight:\u003c\/strong\u003e 10 g\u003cbr\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 13046\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhat This Part Does\u003c\/h3\u003e\n\u003cp\u003eThe 34213 is a genuine Mercury OEM gasket that seals the joint between the engine block and either the mechanical fuel pump or the fuel-pump block-off plate on selected MerCruiser gasoline engines. It prevents engine oil from leaking at the fuel-pump mounting flange — a common leak point when the original gasket has been disturbed, compressed, or left in service too long. Mercury parts diagrams use the same gasket beneath a \u003cstrong\u003eblock-off plate\u003c\/strong\u003e on engines where the mechanical fuel-pump opening is not occupied by an active pump.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cp\u003eConfirm your engine model, serial number, and fuel-system diagram before ordering. Mercury used several fuel-pump configurations across many years of MCM and MIE production.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMerCruiser MCM and MIE gasoline engines with GM and Ford blocks — where 27-34213 is specified in the fuel-system diagram\u003c\/li\u003e\n\u003cli\u003eSelected GM 305 CID V8 MerCruiser sterndrive engines — used as the separate mounting gasket for mechanical fuel pump 8M0058164\u003c\/li\u003e\n\u003cli\u003eSelected GM 350 CID V8 MerCruiser sterndrive engines — same application\u003c\/li\u003e\n\u003cli\u003eMerCruiser engines using a fuel-pump block-off plate at the mechanical pump mounting location\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eDo not assume every GM- or Ford-based MerCruiser engine uses this gasket — confirm by the engine serial number and Mercury fuel-system parts diagram.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSerial Number Notice\u003c\/h3\u003e\n\u003cp\u003eUse 34213 only where the Mercury parts diagram specifies it as either the mechanical fuel-pump mounting gasket or the fuel-pump block-off-plate gasket. Mercury used different fuel-pump mounting configurations across MCM and MIE engine families — always confirm by engine serial number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMechanical fuel pump is removed for service or replacement\u003c\/li\u003e\n\u003cli\u003eFuel-pump block-off plate is removed\u003c\/li\u003e\n\u003cli\u003eOil leakage is visible at the fuel-pump mounting flange\u003c\/li\u003e\n\u003cli\u003eOriginal gasket is torn, compressed, brittle, hardened, or damaged on inspection\u003c\/li\u003e\n\u003cli\u003eMounting surface is being serviced or engine is undergoing a rebuild\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRemove all old gasket material from both mating surfaces before installation — do not leave any residual gasket material that could create an uneven seating surface\u003c\/li\u003e\n\u003cli\u003eKeep debris out of the engine block opening during surface preparation\u003c\/li\u003e\n\u003cli\u003eInspect the fuel pump flange or block-off plate for warping or distortion before reassembly\u003c\/li\u003e\n\u003cli\u003eInstall dry or with sealant only if specified in the Mercury MerCruiser service instructions for the engine\u003c\/li\u003e\n\u003cli\u003eTighten mounting fasteners evenly to the torque specification in the applicable Mercury service manual\u003c\/li\u003e\n\u003cli\u003eRun the engine and inspect the mounting flange area for oil leakage before returning to service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePart Number Cross-Reference\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent OEM:\u003c\/strong\u003e 34213 \/ 27-34213\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 13046 → 34213\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional earlier references (same gasket family):\u003c\/strong\u003e 56883, FI5000074\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 745061137059\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this a fuel-pump gasket or an engine gasket?\u003c\/strong\u003e\u003cbr\u003eA: It is specifically a \u003cstrong\u003efuel pump mounting gasket\u003c\/strong\u003e — it seals the interface between the engine block and the mechanical fuel pump (or fuel-pump block-off plate). It is not a general engine gasket and should only be used where the Mercury parts diagram specifies 27-34213 at the fuel pump mounting location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: My engine doesn’t have a mechanical fuel pump — do I still need this?\u003c\/strong\u003e\u003cbr\u003eA: If the fuel-pump opening is covered by a block-off plate, Mercury diagrams specify the same 34213 gasket beneath the plate. If the plate is removed for any reason, replace the gasket before reinstalling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What replaced 13046?\u003c\/strong\u003e\u003cbr\u003eA: Mercury superseded 13046 to 34213 \/ 27-34213. If your older parts manual shows 13046, order 34213 as the current equivalent.\u003c\/p\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Order 34213 any time a MerCruiser mechanical fuel pump or fuel-pump block-off plate is coming off the engine. The gasket is a low-cost item and should always be replaced rather than reused — a disturbed gasket that is refitted without replacement is a reliable source of an oil leak at the next startup.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issues:\u003c\/strong\u003e The most common mistake is refitting the old gasket after removing the fuel pump, which results in an oil leak at the mounting flange. A second common issue is failing to clean the mating surfaces completely before installation — leftover gasket material causes the new gasket to seat unevenly and leak. Always confirm the gasket is specified at the correct position by checking the fuel-system diagram for the engine serial number before ordering.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":51324678340644,"sku":"34213","price":10.43,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/345fc673-7201-4e16-949c-6e7c6ae7a6ee.png?v=1788741828","url":"https:\/\/marisolmarine.com\/products\/merc-25","provider":"Marisol Marine Company","version":"1.0","type":"link"}