You'll need a flat tip screw driver. I dont think it was mentioned, but you're turning it counter clock wise (left). An easy way to count would be to draw a line with a sharpie or other marker across the head of the screw and onto the carb. That way when you start turning, everytime the lines meet up you'll count one. You may not need it but after a few beers counting gets harder so it took the guess work out for me.