SONICJK said:I use a craftsman through socket set and a flat head.
Damn things are so tiny though it takes me about 3 tries per valve to get it right
DremelAlphaDogChoppers said:The one I am working on has square heads with no slot. I found that a #2 square head screw is a tight fit on the adjuster. I tap it on with a small hammer. It's an awesome tight fit. I successfully adjusted them this afternoon, now I am doing a little fine tuning to the carbs, raising the needle a notch.