no they are not due to carb emissions.
Low Emissions Vehicle
Partial Zero Emissions Vehicle
Oregon has taken a very hard stand against them, and as a state has been very proactive in trying to reduce pollution emissions in all its forms.
Emissions, Auto Transmission
On-Board Diagnostics
adjustment screw is between throttlre linkage and carb body on the right side of the carb as you stand at the front of the car looking at the carb
Light Amplification (by) Stimulated Emissions (of) Radiation
The best example of an ultra low emission gas mower is the Honda HRS216PDA. It's engine is CARB compliant and delivers huge fuel economy and low emissions.
Sure you could do that by replacing the intake and TB with a carb. Your emissions will go up, your mileage and drivability will go down. I would not suggest doing it.
Light Amplification by Stimulated Emissions of Radiation
It is illegal to remove any emissions control devices from a vehicle.