I have a model Ry10352 Chain saw. I have around 30 hours run time on this unit. The saw runs good has plenty of power with a 18 inch bar. It is fairly easy to start and stays running. My only grip is the oil pump drive gear failing at such low hours. This is the first saw I have ever had the oil pump fail on actually. It would be nice if I could purchase the nylon drive gear without having to buy a complete oil pump assembly.