Edelbrock 1478 Installation Instructions Manual
PERFORMER SERIES CARBURETOR
®
For Edelbrock #1405 & #1407 carburetors
ELECTRIC CHOKE KIT
CATALOG NUMBER:#1478
INSTALLATION INSTRUCTIONS
PLEASE study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and
procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation,
it is recommended to have the installation completed by a qualified mechanic. If you have any questions, please call our Technical Hotline at:
1-800-416-8628, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday.
INSTALLATION KIT CONTENTS
1- Choke Piston Housing
1- Connecting Rod
1- Thermostatic Coil Assembly w/Cap
1- Choke Lever
1- Baffle Plate
1- Choke Piston Housing Seal
1- Choke Cap Gasket
1- Hair Clip Retainer
3- Choke Housing Attaching Screw
1- Choke Ground Wire (black)
3- Choke Cap Screw
1- Choke Positive Wire (red)
CHOKE INSTALLATION
3- Choke Cap Retainer
1- Shaft Subassembly
1- 1/4”AN Washer
1- Lever (14-555)
1- Choke Lever Screw
1- Choke Linkage Screw
Choke Cap
Retainers
1. Remove the carburetor from the engine by disconnecting all
linkages and lines. Use the original carburetor Installation Instructions
as a guide. Plug all fuel lines to avoid excessive spillage.
2. Remove the manual choke cable clamp bracket by removing the
airhorn screw. Reinstall the airhorn screw after the manual choke
cable bracket has been removed (Figure 2).
Airhorn Screw
Choke Cap
Gasket
Baffle Plate
Hair Pin
Choke Piston
Housing
Choke Lever & Hex
Head Screw
Connecting
Rod
Seal
Choke Lever
Washer
FIGURE 2
Choke Linkage Screw
Shaft Subassembly
Lever 14-555
4. Remove the screw securing the choke linkage to the shaft
subassembly (Figure 3).
Front of
carburetor
Shaft Subassembly
Screw
FIGURE 1
FIGURE 3
Manual Choke
Cable Clamp Bracket
3. Remove the choke hex head screw securing the choke lever and
discard both the lever and screw. (Figure 1).
Catalog #1478
Rev. 8/28/17 - NP
Brass Plug
(Choke Vacuum Passage)
Front of
carburetor
5. Remove the retaining clip and pull the shaft subassembly out of the
airhorn (Figure 4).
Hair Clip Retainer
©2017 Edelbrock LLC
Page 1
Brochure #63-1478
FIGURE 4
Front of
carburetor
6. Place the supplied #14-555 lever onto the new shaft and slide the
subassembly into the airhorn. The lever should be located on the shaft
using Figure 5 as a guide. Using the factory hair clip, attach the fast
idle linkage rod to the #14-555 lever.
Shaft
FIGURE 5
Fast Idle Rod
13. Install the baffle plate with the indentation facing the carburetor
(Figure 1). Place the cap gasket onto the baffle plate and install the
choke cap so that piston lever sits in the coil slot (Figure 7).
FIGURE 7
Coil Slot
Front of
carburetor
#14-555 Lever
7. Place the 1/4" AN washer from the kit on the protruding end of
the shaft subassembly. Install the new electric choke lever using the
supplied hex head screw (Figure 1). NOTE: Verify that the choke valve
and linkages work freely. It may be necessary to remove the 1/4" AN
washer if the shaft is binding.
8. Carefully secure the choke linkage to the shaft subassembly with
the supplied hex screw (Figure 3). WARNING: This procedure can
only be performed once as the shaft threads are not reusable. Be very
careful not to strip out the screw by overtightening. Stop turning when
the screw head contacts the bracket.
9. Using pliers, remove the brass plug (Figure 2) from the choke
vacuum passage. Use compressed air to clean out any debris in the
passage to ensure it is not blocked.
10. Place the connecting rod into the keyed slot of the choke housing
lever as shown in Figure 6. Place the choke piston housing seal into
the cast recess of the choke housing (Figure 1 & 6).
Choke Housing
Connecting Rod
FIGURE 6
Piston Lever
14. Clock the choke cap clockwise until the indicator on the cap is
center of the indicators on the choke housing (Figure 8). Using the
supplied retainers and screws, secure the choke cap to the housing.
When doing so, attach the black ground wire by placing the eyelet
end of the wire between the designated screw and retainer (Figure
8). Connect the clip end of the black ground wire to the negative (-)
terminal on the choke housing (Figure 8).
FIGURE 8
15. Connect the red wire to the positive (+) terminal on choke housing
(Figure 3). Connect the other end of the red wire to an ignition key
activated +12 volt source. Ensure this source maintains +12 volts with
the engine running. DO NOT ATTACH TO COIL.
Keyed Slot
Seal
11. Install the choke piston housing on the carburetor using the three
self-tapping #20 Torx screws (Figure 1).
12. Place the unattached end of the connecting rod through the hole
on the electric choke lever and secure it with the supplied hair clip
retainer (Figure 1).
Catalog #1478
Rev. 8/28/17 - NP
CHOKE ADJUSTMENT
The length of time during which the choke will stay closed is determined
by the position of the choke cap. As the choke cap is turned clockwise
the choke will stay closed longer. To properly set the choke, loosen
the choke cap retaining screws and turn the choke cap to the leanest
notch on the choke housing. Tighten the choke cap retaining screws,
and run the engine until normal operating temperature is reached.
With the engine running, slowly turn the choke cap clockwise until the
choke valve begins to close. Now turn the choke housing one notch
counterclockwise (LEAN) and tighten the choke housing retaining
screws. Periodic readjustment of the choke will be required as the
temperature changes throughout the year. After each adjustment verify
that the choke valve opens fully after the engine is warm.
Fast idle may be adjusted to manufacturers specifications (usually
1500 rpm) during normal choke cold operation. The fast idle screw
can be adjusted with engine off and throttle held open to allow screw
head access. Recheck fast idle speed after each adjustment.
©2017 Edelbrock LLC
Page 2
Brochure #63-1478
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