REGULATOR WARNING
INSTALLATION INSTRUCTIONS
FORM 1082 (REV. B) 9/03
This kit contains a flat diaphragm assembly that is designed to
replace the old “bell”style (concave) diaphragm assembly.
Because it will not fit in regulators with dual (high pressure)
springs, it will not work in applications over 12 PSI. Old style
diaphragm assemblies are no longer available.
Use Mallory Regulator 4305M for high pressure, fuel injected
applications.
This kit is not recommended for use in fuel systems where the
fuel pump produces more than 200 gallons per hour.
Use Mallory Regulator 4200, 4201, 4300M, or 4301M for fuel
systems with pumps that produce more than 200 gallons
per hour.
IMPORTANT
This kit includes a .06”thick gasket.This gasket is for use ONLY
with early style 4309/4310 housings that have a small diameter
plunger seat.
To determine if the housing has a small or large seat diameter,
remove the regulator cap and old diaphragm and look into
the housing:
.56" (9/16) DIAMETER
LATE STYLE - DO NOT
USE GASKET
DIAPHRAGM
ONLY
DIAPHRAGM
GASKET
.44" (7/16) DIAMETER
EARLY STYLE -
GASKET MUST BE USED
PLACE GASKET HERE
BEFORE INSTALLING
DIAPHRAGM
MALLORY IS A DIVISION OF THE MR. GASKET PERFORMANCE GROUP
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300 FAX 216.688.8306 www.mrgasket.com
FORM 1082
(REV. B) 09/03
Made in U.S.A.
Printed in U.S.A.
REGULATOR WARNING
INSTALLATION INSTRUCTIONS
FORM 1082 (REV. B) 9/03
This kit contains a flat diaphragm assembly that is designed to
replace the old “bell”style (concave) diaphragm assembly.
Because it will not fit in regulators with dual (high pressure)
springs, it will not work in applications over 12 PSI. Old style
diaphragm assemblies are no longer available.
Use Mallory Regulator 4305M for high pressure, fuel injected
applications.
This kit is not recommended for use in fuel systems where the
fuel pump produces more than 200 gallons per hour.
Use Mallory Regulator 4200, 4201, 4300M, or 4301M for fuel
systems with pumps that produce more than 200 gallons
per hour.
IMPORTANT
This kit includes a .06”thick gasket.This gasket is for use ONLY
with early style 4309/4310 housings that have a small diameter
plunger seat.
To determine if the housing has a small or large seat diameter,
remove the regulator cap and old diaphragm and look into
the housing:
.56" (9/16) DIAMETER
LATE STYLE - DO NOT
USE GASKET
DIAPHRAGM
ONLY
DIAPHRAGM
GASKET
.44" (7/16) DIAMETER
EARLY STYLE -
GASKET MUST BE USED
PLACE GASKET HERE
BEFORE INSTALLING
DIAPHRAGM
MALLORY IS A DIVISION OF THE MR. GASKET PERFORMANCE GROUP
10601 MEMPHIS AVE. #12, CLEVELAND, OH 44144
216.688.8300 FAX 216.688.8306 www.mrgasket.com
FORM 1082
(REV. B) 09/03
Made in U.S.A.
Printed in U.S.A.