My Husqvarna model 36 chain saw ain't running right. At first it wouldn't crank for nothing. Checked spark, got spark. Checked piston thru exhaust port, clean. fresh gas, new fuel filter, fuel lines good. I tried everything, even pouring a bit of fuel mix directly in the carb, still wouldn't wouldn't fire. I was about to give up, come in the house & email the experts at arborsite .com, but I tried one last thing, what I probably should've tried first. I adjusted the carb. I turned them both all the way in & turned them both back out 2 1/4 turns. A few pulls & it cranked perfectly. I had to adjust the idle just a bit. But, after a few seconds of running it at full throttle the rpm's started to fluctuate as if I was constantly moving the throttle trigger up and down, but I wasn't, I kept it on full throttle. It idles fine, but when I rev it from idle in almost bogs down like it's gonna shut off but then picks back up & then starts fluctuating again as I hold it on full throttle. Any ideas?!? Thanx for all the tips. Don't know what I'd do without all yall!!!