Hi! My name is Matthew Christian from Tampa, Florida and on behalf of Expert Village, today I would like to talk to you about how to properly use and maintain a high limb chain saw. On most all two-cycled engines, there are a few set screws for adjustments that could make it necessary. One is a idle adjustment. This will change the speed at which the engine idles. If it is idling too slow and has the tendency to stall, you could turn up the idle a little bit with the screw. Two other adjustments which are only recommended for someone who may know what they are doing. It is not recommended for the inexperienced. Two others are idle air bleed and mixture screws. These change the amount of air going into that idle and the other one changes the amount of fuel mixture while it is running. But again, you should know what you are doing before changing these because you could knock it out of equilibrium, let's say and the machine won't run properly.