We have a Stihl 025 that is about 4 years old. Not many hours. First, we had problems with the starter pull cord hitting the flywheel and breaking. Now, problem we're having is after a few tries, it starts, but won't stay running. Our old Poulan did the same thing (after many hard hours). Just seems we should not have these kind of problems with this expensive a chain saw...... I'm beginning to think that more expensive does not equal better quality.