I have never had any problem with the stihl (021) that I have. Check the manual and set the carb. I think you screw the 2 screws all the way in and back them both out 2 rounds. Watch how you grind your chain. I tried to grind mine down, but then I did not have enough power for it to pull through. It realy wanted to dig in.
Many farmers in my area (central Indiana) are using Husquevarnas. I have a model 350 with a 16" bar that I have been cutting with. Cuts really good and is not too heavy. I was running old Mac's and Homelites before, but the new Husquevarna is much nicer. Have a good dealer network in our area for service and parts.
Stihl or Husky both make good saws. As far as cutting the rakers off....a little is ok but don't get carried away. Buy a gauge for raker height, it will keep you from ruining that brand new chain. My granpa had a saw sharpening business for 30 years and he never cut the rakers for his saws and we cut about 60 facecord a year. His big saw was a Stihl 028AV with .325 chain.
We have a one year old Stihl (can't remember the model but about 4.6 cubic inch motor) and a Tanaka ECV 45. We like them both. The Tanaka is extremly light. I prefer it to reach into trees or climb up some place. We had a guy sharpening our chains once, too and he filed them depth gauges in front of the cutting edge off. I thought it made it worse. But just go on the STIHl website. They have a ton of very detailed information there.
Bought Husky 372XP last year, 5.4 hp at 13,500 rpm's, 20 inch bar, Not real heavy and quite smooth running, one of the most impressive saws I have run. I think it compares to a Stihl 046IJ