Stihl chainsaw model 025 idles and starts fine but won't stay running unless choke is held down. Put in new carb kit same problem. Mechanic thought it might be an air leak in the rubber boot between the carb and the block. Took it apart but the boot seems good is still pliable etc. Any suggestions?

Jerry, July 2008

Had the same problem with my 025, changed the carp kit, still not working properley, checked carp kti, had put gasket in up the wrong way (easy done) now it is working fine. Check out your carp again.

V J, September 2010

You putting in a carb kit and a trained mechanic cleaning and putting in a carb kit can make all the difference. More than likley its still in the fuel system but the air leak could be coming from many different places not just the intake boot. You would need special equipment to test for the air leaks properly. I would take it to a mechanic at this point and save yourself some headache. No simple fix here.

barry, July 2008