Mallory Ignition Mallory 2-PORT FUEL PRESSURE REGULATORS 4207_4210 - Manual

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2-PORT FUEL PRESSURE REGULATORS
PART NO. 4207, 4207M and 4210
INSTALLATION INSTRUCTIONS
FORM 1385 (REV. E) 01/12
GENERAL INFORMATION
The 2-Port Regulator is designed to regulate fuel
pressure between high pressure fuel pumps and
carburetors. The regulator is recommended for Mallory
COMP PUMP® 140 Series Electric Fuel Pump. Also, recom-
mended for Mallory High Performance and Competition
Mechanical Fuel Pumps.
MOUNTING PROCEDURE
The regulator may be mounted at any angle. For
maximum efficiency, mount the regulator as close
as possible to the carburetors. DO NOT mount the
regulator on or near exhaust manifolds.
A bracket is provided for convenient mounting under an
intake bolt. Loosen the four regulator base and bracket
screws. Remove two of these screws.
Position the bracket over the two screw holes. Install the
two screws. Tighten the four screws between 16 and 19
in./lbs.
FITTINGS AND FUEL LINE
Purchase fittings (and plugs) as necessary. Use a
thread sealant compound on the fitting threads. You
can find thread sealant compound at a hardware
store. Do not use thread sealing tape. Install the fit-
tings. Do not overtighten the fittings. This could dam-
age the regulator. Connect the fuel lines. See Figures
1 and 2.
FUEL PRESSURE ADJUSTMENT
NOTE: Engine must be running when adjusting
fuel pressure.
Step 1
Connect a fuel pressure gauge to the fuel pressure port.
Step 2
Release the jam nut on the adjustment screw.
Step 3
Start the engine. (Check the fuel system for fuel leaks. Shut
off the engine and correct any fuel leaks before proceed-
ing.)
Step 4
Adjust fuel pressure. Turn adjustment screw clockwise to
increase fuel pressure or counterclockwise to decrease fuel
pressure. Rev the engine slightly several times. Check fuel
pressure. Repeat if necessary.
Step 5
Tighten jam nut and shut off engine.
MALLORY www.mallory-ignition.com
FUEL APPLICATION
Part No. 4207
Gasoline, Automotive/Street and
Racing
Part No. 4207M
Gasoline, Marine
Part No. 4210 Alcohol/Methanol,
Automotive/Street and Racing
PARTS INCLUDED IN THIS KIT
1 2-Port Fuel Pressure Regulator
1 Regulator Bracket
1 Plug, 1/8” NPT
SPECIFICATIONS:
Inlet and outlet port thread sizes:
3/8” NPT
Fuel pressure port thread size: 1/8” NPT
Fuel pressure adjustment range: 4–12 PSI
Maximum inlet pressure: 20 PSI
ADJUSTMENT SCREW
JAM NUT
REGULATOR CAP SCREWS (4)
REGULATOR CAP
OUTLETS TO CARBURETOR
(2 PLACES, 3/8" NPT
FUEL PRESSURE PORT (REAR, 1/8" NPT)
REGULATOR HOUSING
INLET FROM FUEL PUMP (3/8" NPT)
REGULATOR BASE AND
BRACKET SCREWS (4)
REGULATOR BASE
REGULATOR BRACKET (NOT PICTURED)
FIGURE 1