"Rebuilt" Thermoquad idle mixture screws have no effect.

[Geoff 2]

The 1004 is the correct gasket.

 

[Dibbons]

The 1004 is the correct gasket.

Thanks for the tip. But how do we know for sure? I know AI makes mistakes but disconcerting when conflicts with human knowledge

Per AI search:

• The SP-1003 is typically for the small bore Thermoquad.
• The SP-1004 is typically for the large bore Thermoquad.

 

[Dibbons]

I forgot to mention above that I thought I noticed a slight decrease in idle speed when I stepped on the brake pedal. I will have to plug that booster hose later to determine if that is a factor in leaning out the idle mixture (the hose connects to the rear of the intake manifold, not a carb port).

I plugged the P/B hose and it made no difference in the idle speed. Removing carb now.