Hi everyone. I traded a couple of old window A/C units for a 039 this summer. Ran real rough - wouldn't start easy, stalled quickly, etc. Just had time to get at it - replaced the basics (fuel filter, spark plug and air filter), but still seems to run rough. Then I noticed that gas was leaking from the grommet of the fuel line at the fuel tank, so picked up a new line (Oregon unit on-line with free shipping for $6!), and put it in yesterday. That was it - saw running very well now and with a new 20" bar and chain, I'm real happy with how she cuts. My Dolmar has been my got to saw, but I see the 039 sharing a lot more duties. Cheers!