1

MALLORY IGNITION

www.mrgasket.com

ELECTRIC FUEL PUMP

PART NOS. 5250 AND 5250A

INSTALLATION INSTRUCTIONS

FORM 1038 (REV. F) 11/04

GENERAL INFORMATION

volume fuel pump designed for serious racing applications.

The pump is factory set to approximately 15 PSI. In all

cases, this fuel pump must be used with a fuel pressure

regulator. We recommend the following:

Standard Regulator

Mallory 4 Port Regulator

Part No. 4200

(gasoline)

Part No. 4201

(alcohol)

Return Style Regulator

Mallory 5 Port Regulator

Part No. 4300M

(gasoline)

Part No. 4301M

(alcohol)

This fuel system must have a fuel return line going to the fuel

tank. We recommend at minimum a #8 AN (1/2") line.

If you use a standard fuel pressure regulator, not a return

style, run the fuel return line from the fuel pump’s fuel return

port. Use the 3/4"-16 thread x #8 AN flare fitting provided to

connect your #8 AN line.

If you use a return style fuel pressure regulator, run a #10 AN

fuel return line from the fuel pressure regulator’s fuel return

port and install a 3/4"-16 thread plug and o-ring in the fuel

pump’s fuel return port. You can find a 3/4"-16 thread plug

at most hardware stores. Do not try to adjust the bypass

adjustment - pump damage may result.

Be sure to install a suitable fuel filter (maximum 100 micron)

between the fuel tank and the fuel pump. Mallory COMP

This prevents debris from becoming wedged in the fuel

pump’s Gerotor and locking it. An additional filter(s)

(maximum 40 micron) should be installed just before

the carb(s).

PARTS INCLUDED IN THIS KIT:

3 Fittings, 3/4" - 16 x #8 AN Flare

3 O-rings, Nitrile 0.644ID x 0.087 thickness

NOTE: DO NOT OPERATE THIS PUMP

WITHOUT FUEL EXCEPT FOR BRIEF

PERIODS WHILE PRIMING

SPECIFICATIONS

Maximum recommended operating pressure: 20 PSI

(factory set at approximately 15 PSI)

Maximum dry suction lift: 3 feet. This is maximum distance

above the fuel level in the fuel tank that the fuel pump will

prime itself.

Oil pressure switch rating: 15 AMP

Fuel pump over current protection: 15 AMP fuse

Fuel application: Part No. 5250, Gasoline; Part No. 5250A,

Alcohol / Methanol