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MICROSWITCH & BRACKET KIT

For WOT circuit activation

CATALOG #72279, 72280, 72281 & 72284

INSTALLATION INSTRUCTIONS

DESCRIPTION:

Edelbrock Microswitch & Bracket Kits are an

electrical safety precaution designed to prevent nitrous activation
during part throttle operation.

1.

Mount the switch on the bracket so that the switch arm is
resting near the end of the throttle shaft.

2.

Insert the supplied screws through the switch and bracket,
then thread nuts onto the ends of the screws and snug to
secure them.

3.

Mount the bracket on the carb stud (

see chart), then thread a

nut onto the stud to secure the bracket and carburetor in
place. An extended length stud may be required in some
applications.

®

Catalog #72279, 72280, 72281, 72284
Rev. 4/09 - AJ/mc

©2009 Edelbrock Corporation

Brochure #63-72279

Part

Number

Application

Stud Used For

Mounting

72279

Universal

Varies

72280

Edelbrock Performer & Thunder AVS

series AFB Carburetors

Rear, Passenger

72281

Holley 4500 flange ‘Dominator’

Carburetors

Front, Passenger

72284

Barry Grant Race Demon series

Carburetors

Front, Passenger

IMPORTANT NOTE: Proper installation is the responsibility of the installer.  Improper installation will void your warranty

and may result in poor performance and engine or vehicle damage.

4.

Check for full throttle, microswitch operation, and throttle return. The
holes for mounting the switch have been slotted to allow for minor
adjustments.

PLEASE

study these instructions carefully before beginning this installation. 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.

Edelbrock Corporation • 2700 California St. 

• 

Torrance, CA 90503

Tech Line: (800) 416-8628

MICROSWITCH & BRACKET KIT

For WOT circuit activation

CATALOG #72279, 72280, 72281 & 72284

INSTALLATION INSTRUCTIONS

DESCRIPTION:

Edelbrock Microswitch & Bracket Kits are an

electrical safety precaution designed to prevent nitrous activation
during part throttle operation.

1.

Mount the switch on the bracket so that the switch arm is
resting near the end of the throttle shaft.

2.

Insert the supplied screws through the switch and bracket,
then thread nuts onto the ends of the screws and snug to
secure them.

3.

Mount the bracket on the carb stud (

see chart), then thread a

nut onto the stud to secure the bracket and carburetor in
place. An extended length stud may be required in some
applications.

®

Catalog #72279, 72280, 72281, 72284
Rev. 4/09 - AJ/mc

©2009 Edelbrock Corporation

Brochure #63-72279

Part

Number

Application

Stud Used For

Mounting

72279

Universal

Varies

72280

Edelbrock Performer & Thunder AVS

series AFB Carburetors

Rear, Passenger

72281

Holley 4500 flange ‘Dominator’

Carburetors

Front, Passenger

72284

Barry Grant Race Demon series

Carburetors

Front, Passenger

IMPORTANT NOTE: Proper installation is the responsibility of the installer.  Improper installation will void your warranty

and may result in poor performance and engine or vehicle damage.

4.

Check for full throttle, microswitch operation, and throttle return. The
holes for mounting the switch have been slotted to allow for minor
adjustments.

PLEASE

study these instructions carefully before beginning this installation. 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.

Edelbrock Corporation • 2700 California St. 

• 

Torrance, CA 90503

Tech Line: (800) 416-8628

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