Dolmar 7900 just started this a short time ago where it would not completely Idle down. Runs fast enough to move chain 32" bar. Saw is about 10 years old not a super hard life. Had some time to poke around on it today so fired it up, No bar and it really takes off. Sprayed some carb cleaner around the sides of the carb right side seemed to have an affect. Air Leak? Am I on the right track. Diagnostics on small engs. not one of my better venues, but I get bye. Chris