I'm 4th generation in a residential Tree Service. I have all pro saws. I have saws my dad bought new in the 70's. But, the three I use the most are a Stihl MS 170, MS 290 and MS 660. I guess the 170 and 290 don't really count as pro saws. Anyway, if you spend the most money to buy the best pro saw, and then only use it twice a year, you are going to have the same fuel problems the cheap saws have. I have saws with 36 and 45 inch bars and if I want to use them, I've got to screw around with the carbs because they have sat for a year. My 3 go to saws get started and run at least a couple times a week. I should have said I'm a retired 4th generation Licensed Tree Surgeon. My saws only get used to play with. I also have 4 JD tractors and they have the same problems with fuel. If they sit, the carbs get gooped up. I use my tractors year round, two mow, snow blow, and split wood, they get run several times a week yearr round. The others I start up when i happen to walk by them. The more you use them, the less you have to do to them.
