[Hope Springs Hauler]

I could deffinately be wrong, but I think that I read an Impco manual that said that propane carbs adjust opposite of gasoline carbs. For example, if you want a leaner mix on a gas carb you adjust the screw in to tighten the needle to seat clearance. On the propane carb you would screw it out to restrict the valve.

This has seemed to work so far on my smaller propane stuff.