I got my paws on a snowblower with a varnish siezed engine 5 years ago. Figured if I could get it running, I could at least see if the thing was going to be a necessity as age crept up. 4 days into a pb blaster soak I got the piston moving. A new gasket for the top end and a thorough carb effort and she fired up. I'll never be without one again.