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7. Remove mounting nuts or bolts and or washers. Be sure to put them
where they won't fall into the intake manifold upon carburetor removal.
8. Remove carburetor, being careful not to spill any dirt into the intake
manifold. Immediately place a clean rag into the manifold to keep
foreign objects out.
9. Thoroughly remove old mounting gasket and clean mounting surface.
Inspect gasket and match to gasket included with new carburetor.
CARBURETOR PREPARATION
1. Place old and new carburetors side by side and transfer any accessories
that are needed onto the new carburetor.
CARBURETOR INSTALLATION
1. Remove rag from intake manifold and install new mounting gasket.
NOTE: Do not use any cement, glue or liquid gasket.
2. Carefully place new carburetor on gasket.
3. Replace all mounting bolts, nuts and washers. Hand tighten with a short
box end wrench, using even increments alternating between diagonally
opposed bolts. Use stock mounting bolts or Edelbrock Q-Jet Bolt Kit
#1925. CAUTION: Overtightening may break carb base.
4. For models with externally mounted fuel filters, install new fuel filter,
starting threads by hand to avoid crossing or stripping threads. Replace
any old or cracked hoses with new hoses designed for use with fuel.
5. Hook up fuel line to fuel filter. Start threads by hand. NOTE: Be sure
threads are properly aligned before tightening to avoid crossing or
stripping threads. When tightening fuel line use two wrenches; one to
hold the fitting on the carburetor and the second to turn the fuel line
fitting. Use a tubing wrench to avoid rounding the tube fitting nut.
6. Re-connect throttle linkage, wires, hoses, etc. Your Edelbrock carburetor
may have more vacuum outlets than the original. Leave the caps on
those outlets which won't be used.
NOTE: #1901 and #1902 will accept the stock idle speed
compensator bracket, GM #7042682.
7. Re-connect the air cleaner being careful not to over-tighten the
mounting nut which could damage the carburetor. Install a new air filter
(if needed) and re-connect all hoses.
IMPORTANT NOTE: With engine off, make sure that there is no
interference when opening and closing the throttle. Be sure that there
is no binding or hanging up between idle and wide open throttle as this
could cause the throttle to stick, resulting in loss of engine speed
control.
8. Re-connect the negative battery cable to the battery.
LEGEND
A - Diverter Port
B - Choke Pull-down
C - Fuel Inlet
D - Exhaust Gas Recirculation (EGR) Port
E - Idle Mixture Screws
F - Positive Crankcase Ventilation (PCV) Port
G - Canister Purge
H - Distributor Port
I - Idle Speed Screw
J - Accessory Port
K - Bowl Vent
L - Hot Air (#1903 only)
M - Fast Idle Screw
N - Clean Air (#1903 only)
O - 1/4" N.P.T. (Power Brake Port)
© 2002 Edelbrock Corporation
Brochure No. 63-0073
C
A
D
Front View of #1901 and #1902
B
C
L
M
D
Front View of #1903, #1904 and #1906
Page 2 of 4
B
E
F
G
E
J
E
E
G
F
O
A
Typical Rear View
I
H
K
H
I
N
Rev 02/02
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