Gas running out of the throttle shaft on a Rochester Dualjet carburetor typically indicates a problem with the float level or needle and seat assembly.

Here are the most common causes:

• Sticking Float: A faulty float can cause the fuel level in the carburetor bowl to be too high, leading to overflow.
• Worn Needle and Seat: The needle valve and its seat regulate fuel flow. Wear or damage can prevent the needle from sealing properly, causing fuel to leak past it.
• High Fuel Pressure: Excessive fuel pressure from the pump can overwhelm the carburetor's ability to regulate flow, leading to overflow.

Troubleshooting Steps:

1. Visual Inspection: Check for any visible damage to the float or needle and seat.
2. Float Level Adjustment: Ensure the float level is set correctly according to the carburetor specifications.
3. Fuel Pressure Check: Verify the fuel pressure is within the recommended range.
4. Replace Parts: If necessary, replace the float, needle, or seat assembly.