Edelbrock 1903 Installation Instructions

PLEASE study these instructions carefully before installing your new Carburetor. If you have any questions or problems, do not hesitate to contact
our Technical Hotline at: 1-800-416-8628, 7 am - 5 pm, Monday-Friday, Pacific Standard Time or e-mail us at edelbrock.edelbrock.com.
IMPORTANT INFORMATION ABOUT YOUR WARRANTY
If you have any problems with installation or performance, do not return to the retailer. The retailer is not authorized to perform
Warranty Service. Instead, call the Edelbrock Carb Tech Hotline at 800-416-8628 from 7am - 5pm PST on weekdays. All returns must
be accompanied by the original purchase receipt. The warranty period is 90 days for new carburetors and 30 days for "as-new" (remanufactured)
carburetors.
DESCRIPTION
The Edelbrock Performer Replacement Series Carburetor for
Q-Jet applications is a high quality, all new carburetor designed to
replace the original equipment Q-Jet spread-bore carburetors found
on most 1966 -1989 non-computer controlled Chevrolet/GMC V8s.
These carburetors are street legal/stock replacement parts when used
on the applications for which they are listed. Edelbrock replacement
carbs for Q-Jet applications are compatible with all OEM linkage and
components for the years listed, and will fit stock intake manifolds.
For best performance, they may be used with the matching Performer
or Performer EGR intake manifold for those who wish to use a new
stock replacement carburetor.
Five models are available for the following applications:
1. #1901 (750 cfm) - Recommended for most small-block and big-
block Chevrolet/GMC V8s, 327 through 454 c.i.d., in both truck and
BEFORE YOU BEGIN, ALWAYS REMEMBER TO:
❑ Replace fuel filter. Dirt found in carburetor voids warranty.
❑ Check and replace the air filter if necessary.
❑ Check PCV valve and replace if clogged.
❑ Check all hoses for leaks or cracks and replace if necessary.
❑ Check fuel pump for proper operation and replace if necessary.
❑ Check the intake manifold and cylinder head gaskets for leaks and
replace if necessary.
❑ Check the ignition system: clean and gap or replace spark plugs, plug
wires, and adjust ignition timing.
CARBURETOR REMOVAL
1. Prior to removal make sure that the engine is cool.
2. Disconnect negative battery cable from battery.
3. Remove air cleaner. Be sure to carefully disconnect any hoses from
the air cleaner and note their location for re-installation. You may want
to mark them with masking tape for easy reference.
4. Disconnect throttle linkage, kickdown linkage (certain automatic
transmission applications only), cruise control (if equipped) and any
return springs if present. NOTE: Check carefully for the precise
location of all these linkages and return springs. You may want to
mark them with masking tape for easy reference. Compare throttle
arm of your new carburetor with the old one to be sure that all
required linkages will hook up. Ball stud is usually removable and
must be installed in the proper location (see Figures 1 & 2).
5. Disconnect all wires, tubes and hoses from carburetor and note their
location. NOTE: There should be a maximum of one wire to the
electric choke and one to the idle compensator solenoid. Any other
electrical wiring attached to your carburetor indicates a computer
© 2002 Edelbrock Corporation
Brochure No. 63-0073
PERFORMER REPLACEMENT SERIES
CARBURETORS FOR Q-JET APPLICATIONS
for non-computer controlled Chevrolet/GMC V8s; 1966-89
CATALOG #1901, #1902, #1903, #1904 & #1906
passenger car applications using a remote style choke; 1966 to
1973.
#1902 (750 cfm) - Recommended for most small-block and big-
2.
block Chevrolet/GMC V8s, 350 through 454 c.i.d., in both truck and
passenger car applications using a remote style choke; 1974 to
1978.
#1903 (795 cfm) - Recommended for most small-block
3.
Chevrolet/GMC V8s, 305 through 454 c.i.d., in both truck and
passenger car applications using a hot air style choke; 1975 to
1985. (Electric choke conversion, see choke linkage section.)
#1904 (795 cfm) - Recommended for most small-block
4.
Chevrolet/GMC V8s, 305 through 350 c.i.d., in truck applications only
using a full electric choke; 1980 to 1989.
#1906 (795 cfm) - Recommended for big-block Chevrolet/GMC
5.
V8s-454 engines in truck applications only using a full electric
choke; 1980 to 1989.
controlled engine, and Edelbrock Q-Jet carburetors will not function
correctly on computer controlled applications. Disconnect the heater
tube from the choke housing
(#1903 only). If the tube is
burned out, replace it. Failure
to do so will cause deposits to
form inside the carburetor,
improper choke operation, and
void the warranty.
6. Carefully remove fuel line
from carburetor or fuel filter.
TAKE EXTREME CARE NOT
TO SPILL ANY EXCESS
FUEL. Place a rag
underneath the fuel line to
absorb any spillage that
may occur . Certain
models require two
wrenches to remove the
fuel line; one to hold the
fitting on the carburetor
and the second to turn the
fitting on the fuel line. Use
a tubing wrench to avoid
rounding the tube fitting
nut.
Page 1 of 4

INSTALLATION INSTRUCTIONS

Figure 1
Throttle arm of #1901
Figure 2
Throttle arm of #1902,#1903,#1904 &#1906
Rev 02/02