The Stovebolt Site Forums The Shop Area Engine Shop Carter YF Stumble

On a project truck I have with a Carter YF carburetor I have a stumble coming off idle when I accelerate. It's noticeably worse when the motor warms up. Once I get past that it runs cleanly and drives well.Points and timing are good and the vacuum advance works properly so I thinks it's the carb. The idle bleed screw is set spot on also. One other thing I'll mention is that the fuel mileage is not good for a small six. All this leads me to believe that the float level may be too high but I haven't had it apart yet and don't have the specs to set it.

I'm looking for suggestions on this and a ya or nay on my float level idea.

-Mike-

I would check the accelerator pump circuit, make sure it has a good squirt of fuel. Check it with the egine shut off.Remove your air cleaner, and look down the carb with a good light, mash the throttle and look for fuel coming out of the accelerator pump circuit

I checked that and I'm getting enough fuel from the accelerator pump, one more thing to cross off the list. Thanks for the input!