Holley 0-80508S User Manual

CARBURETOR
P/N 0-80508S, 0-80508SA, 0-80783C, 0-80459SA (electric choke)
P/N 0-3310S, 0-3310C & 0-3310SA (manual choke)
INSTALLATION, TUNING, AND ADJUSTMENT
MANUAL
199R9934-3
NOTE: These instructions must be read and fully understood before beginning
installation. If this manual is not fully understood, installation should
not be attempted. Failure to follow these instructions, including the
pictures may result in subsequent system failure.

Holley 0-80508S Specifications

General

Brand	Holley
Model	0-80508S
Category	Automobile Accessories
Language	English

Summary

Holley Carburetor Installation

Mount Carburetor to Manifold

Place the carburetor on the gasket and snug down hold-down nuts in a crisscross pattern.

Check Throttle Linkage Travel

Ensure correct throttle lever travel without sticking or binding.

Reconnect Linkages and Hoses

Reconnect throttle, kickdown linkage, return spring, and vacuum hoses.

Reconnect Throttle and Kickdown Linkage

Connect Vacuum Hoses

Choke and Fuel System Connections

Connect choke systems and check fuel lines for leaks.

Electric Choke Model Connections

Manual Choke Model Connections

Check Fuel Lines for Leaks

Start engine and check fuel lines and fittings for any potential leaks.

Final Adjustments and Air Cleaner Installation

Set idle speed, readjust linkage, and install air cleaner.

Set Engine Idle Speed

Readjust Transmission Linkage

Holley Carburetor Choke Adjustment

Adjusting Electric Choke Cap

Rotate choke cap to adjust choke operation timing for cold starts.

Adjusting Fast Idle Speed Screw

Adjust fast idle speed screw for desired idle RPM when cold.

Holley Carburetor Idle Mixture Adjustment

Tune Idle Mixture Screws

Adjust idle mixture screws for highest possible vacuum reading.

Reset Curb Idle Speed

Troubleshooting Rough Idle and Leaks

Diagnose and resolve rough idle and vacuum leaks.

Holley Carburetor Float Level Adjustment

Check Fuel Level via Sight Plug

Observe sight plug to check primary fuel level.

Adjust Float Level

Loosen lock screw and turn adjusting nut to set float level.

Holley Carburetor Vacuum Secondary Tuning

Change Secondary Diaphragm Spring