Echo 590 odd problem

[wiredneck1]

I have a echo 590 that I have had 4 years and no problems until now. When I get the bar slightly pinched in a cut and I pull it back to get it out and the saw flexes at the joint a little it dies but once out it starts right back up. Can anyone tell me what to look for before I tear into it to see what's going on?

 

[mountainlake]

Most likely a torn intake boot. Steve