I have a Shindaiwa F-20 that I purchased new in 1985. The only thing I have ever done to it is replaced the bump head about 10-12 years ago. It's now leaking gas and there aren't any parts for it. I remember paying 129.00 for it 30 years ago which was more than my push mower, but it's been an excellent machine. I would say 30 years of service is pretty good! :-) Off to the Shindaiwa store I go!!!!