Delphi MF0025 Mechanical Fuel Pump
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Delphi

Delphi MF0025 Mechanical Fuel Pump

Brand Delphi MF0025
Average Flow Rating 25
Fuel Type Gas
Gasket Or Seal Included Yes
Inlet Outside Diameter 0.375
Inlet Type Hose Bead
Item Grade Standard Replacement
Outlet Fitting Thread Size 5/8-18 UNF
Outlet Quantity 1
Outlet Type Threaded
Package Contents Mechanical Fuel Pump, Gaskets, Instruction Sheet
System Pressure 5 psi
Fits Buick, Chevrolet, Pontiac, GMC, Oldsmobile, and Cadillac · 149 vehicles

Standard replacement. Built as a mechanical fuel pump for straightforward replacement.

Gaskets included. Comes with gaskets and an instruction sheet for easier installation.

OE heritage. Backed by a century of OE experience and supplier knowledge.

Cross-references Airtex Fuel Pumps 41209, Carter M6951 and Spectra Premium SP1028MP for the same application. See all 7.

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Delphi MF0025 Mechanical Fuel Pump

Delphi MF0025 is a standard replacement mechanical fuel pump for gasoline applications that require a 5 psi system pressure and a 25 average flow rating. It is built for vehicles equipped with a 2-line fuel pump setup and includes the gasket or seal needed for service.

Key Features

  • Mechanical fuel pump for gas engines
  • 5 psi system pressure
  • 25 average flow rating
  • Hose bead inlet with 0.375 in. outside diameter
  • Threaded outlet with 5/8-18 UNF fitting
  • Gasket or seal included
  • Package contents: mechanical fuel pump, gaskets, instruction sheet
  • Standard replacement grade

OE-Style Fuel Delivery

Delphi MF0025 is engineered from the company’s OE heritage and aftermarket experience, with application coverage for a wide range of classic GM vehicles. It is a direct service choice for drivers searching for a mechanical fuel pump for 1977-1985 Buick LeSabre, Buick Regal, Chevrolet Caprice, Chevrolet Impala, Chevrolet Monte Carlo, Pontiac Bonneville, and related models listed in the fitment data. This part cross-references Airtex Fuel Pumps 41209 and Carter M6951 for the same application. The Delphi MF0025 part number is also commonly searched alongside 41209 when replacing a 2-line mechanical fuel pump.

Common Issues This Pump Can Address

  • Hard starting caused by weak fuel delivery
  • Fuel starvation at the carburetor
  • Low fuel pressure in a 2-line mechanical fuel pump system
  • Engine hesitation under load from inconsistent fuel flow
  • Service replacement for worn or leaking mechanical pump assemblies

Installation Notes and Tips

Verify that the vehicle uses a 2-line fuel pump configuration before ordering. Confirm inlet and outlet orientation, threaded outlet size, and fuel line condition during installation. Use the included gasket or seal, follow the instruction sheet, and check for leaks after startup. For fitment-specific searches, this pump is listed for applications such as Fits 1978-1985 Buick LeSabre, Fits 1980-1985 Chevrolet Caprice, and Fits 1977-1984 Oldsmobile Cutlass Supreme, all with 2-line fuel pump configurations.

Quality Assurance

Delphi draws on more than 100 years of OE experience and a broad aftermarket portfolio built from original equipment knowledge. That background supports consistent part selection for classic fuel system service across the listed Buick, Chevrolet, Oldsmobile, Pontiac, and Cadillac applications.

Related reading

This part fits 149 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1985BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1985PontiacParisienneN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984BuickLeSabreN/Awith 2 Line Pump; 1st Design
1984BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1984PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1984PontiacParisienneN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983BuickRegalN/Awith 2 Line Pump; with I.D. # 41209
1983BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983Oldsmobile98N/ACompatible with vehicles equipped with a 2-line fuel pump.
1983OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983OldsmobileCutlass CruiserN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1983PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1983PontiacParisienneN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982CadillacDeVilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982CadillacFleetwoodN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982CadillacSevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982Oldsmobile98N/ACompatible with vehicles equipped with a 2-line fuel pump.
1982OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982OldsmobileCutlass CruiserN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1982PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1982PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981BuickCenturyN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletCamaroN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981ChevroletMonte CarloN/Awith 2 Line Pump; with I.D. # 41209
1981Oldsmobile98N/ACompatible with vehicles equipped with a 2-line fuel pump.
1981OldsmobileCutlassN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981OldsmobileCutlass CruiserN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacCatalinaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacFirebirdN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1981PontiacLeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980BuickCenturyN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980CadillacDeVilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980CadillacFleetwoodN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980ChevroletCamaroN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980ChevroletCapriceN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980ChevroletImpalaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980OldsmobileCutlassN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980OldsmobileCutlass SalonN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacBonnevilleN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacCatalinaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacFirebirdN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1980PontiacLeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979BuickCenturyN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979BuickSkylarkN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileCutlassN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileCutlass SalonN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1979OldsmobileOmegaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacCatalinaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacFirebirdN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacGrand AmN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacLeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1979PontiacPhoenixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978BuickCenturyN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978BuickLeSabreN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978BuickRegalN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978BuickSkylarkN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978ChevroletEl CaminoN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978ChevroletMalibuN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978ChevroletMonte CarloN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileCutlassN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileCutlass CalaisN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileCutlass SalonN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1978OldsmobileOmegaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacCatalinaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacFirebirdN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacGrand PrixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacLeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1978PontiacPhoenixN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977BuickCenturyN/Awith 2 Line Pump; Late
1977BuickLeSabreN/Awith 2 Line Pump; Late
1977BuickRegalN/Awith 2 Line Pump; Late
1977BuickSkylarkN/Awith 2 Line Pump; Late
1977OldsmobileCutlassN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977OldsmobileCutlass SupremeN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977OldsmobileDelta 88N/ACompatible with vehicles equipped with a 2-line fuel pump.
1977OldsmobileOmegaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977PontiacCatalinaN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977PontiacFirebirdN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977PontiacGrand LeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977PontiacLeMansN/ACompatible with vehicles equipped with a 2-line fuel pump.
1977PontiacPhoenixN/ACompatible with vehicles equipped with a 2-line fuel pump.
Directly replaces or cross-references 7 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Airtex Fuel Pumps — 41209Carter — M6951Spectra Premium — SP1028MP6852364412096471172AMF0025