I got an 025 off a guy that took his quad bike out to tow some firewood and had a can of gas and a can of premix but mixed them up. I also got an 066 off a farmer that said it wouldn't start , its air filter was clogged full of sawdust and the carb was full of crap too, I ended up replacing the piston because is was a bit rough on the intake side. Still the filthiest saw I've ever had to clean, beats the hell out of me why anyone would buy an expensive saw and treat it like that.