Mallory Ignition Mallory FUEL PRESSURE REGULATOR 4200_4201 User Manual
Installation instructions
INSTALLATION INSTRUCTIONS
FUEL PRESSURE REGULATOR
SERIES 4200/4201
Mallory's 5-Port Return Style Fuel Pressure Regulator is
recommended for high volume applications (250-500
GPH). This regulator is available in two models:
• Series 4200, designed for gasoline applications
• Series 4201, designed for alcohol applications
For best efficiency, the regulator should be mounted as
close as possible to the carburetor.
Both regulators are adjustable from 5 to 18 PSI at a flow
rate of 500 GPH. To adjust pressure, loosen the jam nut
and turn the adjustment screw. Clockwise rotation
increases pressure.
NOTE: Adjusting fuel pressure higher than 7 PSI on
carbureted engines may cause carburetor flooding and
possible fire.
OUTLET TO CARB.
(#10 AN) CAN BE USED AS OUTLET TO CARB.
(#10 AN) INLET FROM PUMP
MOUNTING SCREWS (2)
PRESSURE ADJUSTMENT SCREW
#8 AN (5-PLC'S) CAN BE USED AS
JAM NUT
ATMOSPHERIC COMPENSATION PORT
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