[Shepard]

I've done a lot of carburetor work in my life and can tell you that jetting a carb can be almost impossible for the inexperienced mechanic. Changing jets one at a time is so limited in response and expensive -- but most of all timing wasting unless its the only way you can go. You can adjust the 3 adjustments on a carb in less then 15 when the circuits are metered. It just has to be warmed up and have the air filter in place.