Has to be my currently "in-the-bucket" Puolan 2XX0 "Super Clean" mamma-jamma. This was the "last years model" display job I got on what looked like a deal at the time. Was missing a bar nut, and was not assembled worth a poop. Got a nut, jiggied it all back together and cut wood. Dis well for the first weekend, then it refused to maintain tune, never revved smoothly or well, and leaked bar oil whenever, well, whenever it had any in the tank. The thing started throwing chains right and left - even after double and triple-checking the bar, chain(s), and sprocket. Never found out why, and after giving thought to my truck's permanently fouled carpet, potentially lost digits, and general PITA factor, I just went and replaced it. It still sits nose-down in a 5-gallon bucket in the garage. I've often thought about resurrecting it now that I'm cooled off and don't need it but I just never have found a good donor saw. I suppose the first step would be figuring out the model, huh? The engine can't have but 6 hours on it.