Gadge and Jack,
Thanks for your replies. It's been very wet where I am and I haven't had time to do much with it lately. But I was going to ask whether if I could step back and actually adjust the height, that would change things. What confuses me is that when I tested it (before I paid for it) it cut the grass perfectly. It rolled as it should and there was no indication that the grass wasn't being properly cut. So I'm surprised to hear that the cutting blade probably needs replacing.

Gadge, what's wrong with WD-40?

Jack, I would at least like to have a go at getting it working, even if I can't restore it. I'm not sure what you mean by economically not worth it, perhaps you're saying that it would be cheaper for me to buy a new one?

By the way, can someone explain how to get this system to send me an email when someone replies to a post?

Last edited by user101; 31/01/15 10:16 PM.