Trying to chase a problem with this 272xp I picked up. Saw will run okay for a short while then rev high or bog down to almost quit under load. Carb seems fine and is now rebuilt. This saw doesn't have a impulse line but I'm wondering if the gasket from the carb to the cylinder is causing my issue.. the gasket has failed in one area that I think is important. I'm going to replace it but I'm wondering if any have had similar issues with this model. And no I have done a leak test yet.. was going to try this gasket first if that was a potential problem. Thanks!