The Mercury 94820 is Gold 39 PSI Mercury 2.5l EFI Offshore Fuel Pressure 39psi Regulator 94820T 29482.
 
The Mercury Racing S3000 and Drag 300 use the Black 56 PSI Bosch EFI Fuel Pressure Regulator (OEM part Number 8M0051195 supersedes 12026-2) which is no longer available (NLA) new from Mercury Marine, Quicksilver, or Bosch.
 
Fuel pressure regulators are critical components in fuel injection systems, ensuring that the fuel pressure remains consistent and at the correct level for optimal engine performance.
 
Maintain Constant Pressure: It maintains a consistent fuel pressure in the fuel rail, allowing for proper fuel atomization and combustion in the engine.
 
Fuel Return: Excess fuel not used by the injectors is sent back to the fuel tank through a return line.
 
Vacuum Assistance: The engine vacuum slightly adjusts the fuel pressure based on the engine's load and speed.
 
This ensures the engine receives the proper amount of fuel for optimal performance and efficiency. The regulator works by controlling the flow of fuel back to the fuel tank, maintaining a consistent pressure in the fuel rail.
 
Select 39 PSI or 56 PSI fuel regualtor at checkout: 
 
39 PSI Fuel Pressure Regulator (Silver) to replace the Mercury 94820 which was (Gold) 39 PSI Mercury OEM 2.5l EFI Offshore Fuel Pressure 39psi Regulator (OEM Part Numbers 94820T, 29482)
 
56 PSI Fuel Pressure Regulator (Silver) to replace the Mercury Racing S3000 and Drag 300 that use the (Black) 56PSI Bosch EFI Fuel Pressure Regulator (OEM part Number 8M0051195, 12026-2)
 
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