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COMP PUMP
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
GENERAL INFORMATION
The COMP PUMP
®
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
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.
INSTALLATION INSTRUCTIONS
ELECTRIC FUEL PUMP
PART NOS. 5250 AND 5250A
Part No. 4200
(gasoline)
Part No. 4201
(alcohol)
Part No. 4300M
(gasoline)
Part No. 4301M
(alcohol)
Mallory-Ignition.com
®
SERIES 250
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
Be sure to install a suitable fuel filter (maximum 100 micron)
between the fuel tank and the fuel pump. Mallory COMP
FILTER
®
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).
FORM 1038 (REV. F) 11/04
1
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