there is no black smoke . when i try to adjust the idle screw , it just seems not to do much , unless i turn it way in , then the motor really slows . i did the propane thing again & cannot detect any change in the way it runs . i took carb off & re-cleaned it ( saw nothing )floats are @ specs. valve adj. is good . points i reset to .016 ( from .019 new ) . it has to be one of three things : ign. - vacum or carb . she's got gas ! thanks for helping .
