PN5250 Datasheet, PDF (1/8 Pages) Mallory performance club – Mallory Fuel Series 250 Electric Fuel Pump

Mallory Fuel Series 250
Electric Fuel Pump
PN 5250, PN5250A
Parts Included in this kit:
1 - COMP PUMP® Series 250 Electric Fuel Pump
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
GENERAL INFORMATION
The Mallory Fuel 250 Series Electric Fuel Pump is a high 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
Return Style Regulator
Mallory 5 Port Regulator
PN 4200 (gasoline)
PN 4201 (alcohol)
PN 4300M (gasoline)
PN 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 Fuel Series Part Nos. 3140 or 3500 are recommended. 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).
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