Hi we got one of those Poulan saws here looks like the brake mechanism got hot and maybe melted the plastic while saw was running, I think crap gets in and makes the brake drag till it self destructs!..
This happened to ours this winter. luckily for me L.O.L!!!!!! my Dads a pack rat and kept the last junk pile the motor went out of, so I had parts here. He spent the morning messing with it. Next time I have bother with a poulan i"m gonna run the parts one over so we have to go buy something else because he"s got no spare parts here to fix it. I hate that saw.