well, i put my saw back together with the trimmer head on it last night. i dumped the old fuel, changed the plug, checked the fuel filter (looked ok---i have one on order) and refilled and it hit on the 5th pull and ran on the 6th. it has not run for two years, but we are pretty religous about using stabilizer in the fuel. i ran it for a couple of minutes and it ran great. then it started to stumble and want to die out. feathering the throttle would barely keep it running, but it would always restart. it really hesitated coming off of idle. i finally turned the H and L to the factory setting of 1.25 from seated and it seems to have fixed the hesitation and it will idle nicely, just burbling along.
after i got the hesitation fixed, i decided i would check the top end. this saw came from a City of Atlanta auction in 1979 and it has only been run with a trimmer head. i don't think it has likely ever gone over 5-6k rpm. it just isn't necessary to rev it high with the trimmer head. it really seemed to rev into the stratosphere. i don't have a tach, but just comparing it by ear to my 310, which is a tick over 13,200, it seemed to spin up much higher. some of that might be the difference in sound of due to the size of the motor. it really sounds nice at idle, like a light weight fighter: lean and mean and a lot more raw than my 310 (for a few more days anyway, until i get a chance to mod its muffler). can i calm this saw down by turning the H screw in a touch? i didn't mess with it once i got the stumble fixed bc it was bed time. i plan to put the B+C on it for limbing when i get in the woods in the next few weeks.
