While i was standing in front of the prop and my hand was in front of the prop,that is when i noticed something like a mist,i held my hand there for a few seconds and my hand and arm could feel something like mist,i might of been adjusting the low screw on the carb,the engine runs well,even with the 12X4 three blade prop but runs better with the 10X6,however the 10X6 is a tapered prop,maybe that is the reason it pulls it better.I'm going to do some more checking,as soon as i mow the wet lawn and get some honey-do's,my wife isn't having a fit,YET[