This chainsaw will start good, idles good, revs up to full throttle good. The problem comes after 30 seconds of wide open throttle it will bog down and die. I have adjusted the high adjustment on the carb to no avail. I have checked the fuel lines, they are good. Has fresh gas. Good spark plug. Does anyone have a suggestion for me to do next, or any idea what the problem could be. The saw is not that old and has good compression. Thanks for any help you could give me.