Hello all, I have a similar problem. I am using a new but older style OS 91 surpass (not the II). I can adjust the low end and get it to idle for for about 20 seconds then it seems to load up and eventually quit. I also notice that the when the tank is full it floods the carb. Does this have have something to do with the idle problem or does it not matter when its running? also how do I stop the fuel from filling the carb. Thanks for any help. Nathan