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Fuel Pressure Regulator 39 PSI or 56 PSI, Mercury 2.5 EFI

Fuel pressure regulators are essential components in fuel injection systems, ensuring consistent fuel pressure for optimal engine performance.

 

In Mercury 2.5 EFI 2-stroke V6 outboards, maintaining the correct fuel pressure is crucial for efficient fuel atomization, combustion, and overall engine operation.

 

39 PSI Fuel Pressure Regulator (Gold) – Mercury OEM 94820 (Gold)

 

The Mercury 94820 is a 39 PSI fuel pressure regulator designed for Mercury 2.5L EFI Offshore engines. This regulator, also known by part numbers 94820T and 29482, ensures proper fuel delivery by maintaining a steady 39 PSI in the fuel rail. It plays a critical role in regulating fuel flow, returning excess fuel to the tank, and adjusting pressure based on engine load and speed.

 

56 PSI Fuel Pressure Regulator (Gold) – Mercury Racing S3000 and Drag 300 (OEM 12026 Black)

 

For high-performance applications such as the Mercury Racing S3000 and Drag 300, a 56 PSI Bosch EFI fuel pressure regulator is required. The original OEM part number 8M0051195 (superseding 12026-2) is no longer available (NLA) from Mercury Marine, Quicksilver, or Bosch. This regulator maintains a higher fuel pressure, ensuring optimal fuel delivery for these high-output engines.

 

Key Functions of Fuel Pressure Regulators:

 

  • Maintain Constant Pressure: Ensures consistent fuel pressure in the fuel rail, allowing for proper fuel atomization and combustion.

  • Fuel Return System: Excess fuel not used by the injectors is returned to the fuel tank via a return line.

  • Vacuum Assistance: Engine vacuum slightly adjusts fuel pressure based on load and speed, optimizing fuel delivery.

 

When selecting a replacement fuel pressure regulator, choose based on your engine’s fuel pressure requirements:

 

  • 39 PSI Fuel Pressure Regulator (Gold): A replacement for the Mercury 94820 (OEM part numbers 94820T, 29482).

 

  • 56 PSI Fuel Pressure Regulator (Silver): Suitable for Mercury Racing S3000 and Drag 300, replacing the Black 56 PSI Bosch EFI Fuel Pressure Regulator (OEM part numbers 8M0051195, 12026-2).

 

By ensuring the correct fuel pressure regulator is installed, you can maintain optimal engine performance, fuel efficiency, and reliability in your Mercury 2.5 EFI 2-stroke V6 outboard.

 

Mercury Racing 2.5 Liter EFI ECU Fuel Pressure PSI Chart

 

Box

Race EFI Motor

PSI

RPM Limiter

A29

2.0 1994

39

11,500

A40

2.4

39

7,700

A32

2.5 ROS 1994

39

8,200

A36

2.5 ROS 1995

39

8,200

A48

2.5 Drag 1995

39

11,500

A33

2.5 S3000 1994

39

9,250

A49

2.5 1996

39

7,750

A62

2.5 1996

39

7,750

A4

2.4

39

7,500

A1

2.5 280 Consumer

39

7,600

A5

2.5 280 ROS

39

8,200

A45

2.0 1995

56

11,500

A46

2.0 1995

56

11,500

A53

2.0 1995 Service Only

56

9,259

A63

2.5 Drag 1995+

56

11,500

A47

2.5 S3000 1995

56

9,250

A52

2.5 S3000 1995

56

9,250

A61

2.5 S3000 1996

56

9,250

A65

2.5 1997 PROP Tour

56

8,600

A2

2.0 Mod U

56

11,500

A3

2.0 PROP Tour

56

9,400

A6

2.5 Drag

56

11,500

A7

2.5 S3000

56

9,350

A8

2.5 S3000

56

9,350

A10

2.5 S3000 PROP Tour

56

8,650

A13

2.5 DRAG 2001

56

11,500

A14

2.5 S3000

56

10,100

 

Contact Mike Hill at +1-714-697-1716 or email mike@buckshotracing77.com for technical support.

Fuel Pressure Regulator 39 PSI or 56 PSI, Mercury 2.5 EFI

SKU: 12026-2-77
$99.00Price
Quantity
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