When I taught small engines at the school I taught at. I had a lady bring in her snowblower with a siezed piston. She said she always mixed the gas and oil properly. Thing was it was a four stroke and it ran out of oil in the crankcase. Surprisenly the cylinder walls weren't too bad. Bored the cylinder put in oversize piston and rings and gave her a lesson on where to put the oil:lol:
fatrap
PS for you fortunate types that don't know what a snowblower is, its what you use a lot in my part of the country to remove snow from your driveway. I helps pass the time when everything is frozen solid and you can't fish.